How to Value a Plumbing and Electrical Business: Moving from SDE to EBITDA

Owners often ask a simple question: “What is my plumbing and electrical business worth?” The more useful question is more specific: “Which earnings measure and valuation methods fit this company, this buyer, this purpose, and this evidence?” That distinction matters because a small owner-operated repair shop, a multi-crew service contractor, and a project-heavy commercial subcontractor may all have similar revenue but very different transferable cash flow, risk, documentation, and buyer appeal.

For many smaller trade businesses, seller’s discretionary earnings, or SDE, can be a practical starting point because it looks at the economic benefit available to one working owner, assuming the owner actively participates in the company. For larger, management-run, acquisition-financed, or more transferable contractors, EBITDA often becomes more useful because buyers, lenders, and appraisers need a clearer view of enterprise earnings after owner-specific benefits and replacement management costs are considered. CFI’s educational materials describe SDE and EBITDA as different earnings concepts, while professional valuation sources emphasize that any conclusion of value should be developed and reported with appropriate scope, assumptions, evidence, and methods (AICPA & CIMA, n.d.; Corporate Finance Institute, n.d.-a, n.d.-b; International Valuation Standards Council [IVSC], n.d.; National Association of Certified Valuators and Analysts [NACVA], n.d.).

This article does not publish a universal SDE, EBITDA, revenue, or asset multiple for plumbing contractors, electrical contractors, or combined plumbing and electrical businesses. The Phase 1 and Phase 1B research for this article did not verify a credible current universal multiple range from a source suitable for publication. That is not a weakness. It is the point. A selected multiple, if one is used, should be supported by normalized earnings, comparable transaction evidence, growth, risk, transferability, asset intensity, and deal terms. Damodaran’s chapter on earnings multiples warns that multiples are widely used and can be misused when definitions and fundamentals are ignored (Damodaran, n.d.). In contractor valuation, that caution is especially important.

A business valuation for a plumbing and electrical company should therefore start with what is actually being valued. Is the subject a one-owner shop where the seller still estimates jobs, answers emergency calls, and holds key relationships? Is it a mixed residential and light-commercial service provider with dispatch systems and trained crews? Is it a commercial contractor with WIP, backlog, retainage, bonding, and change-order risk? The answer determines how the appraiser bridges SDE to EBITDA and how much weight to place on the market approach, discounted cash flow, and asset approach.

Quick answer for owners: what drives value in a plumbing and electrical contractor?

The short answer is that a plumbing and electrical business is usually valued from normalized cash flow, not revenue alone. Revenue tells you activity level. It does not tell you whether jobs are profitable, whether the owner is replaceable, whether add-backs are credible, whether the fleet is worn out, whether receivables are collectible, whether customer relationships transfer, or whether safety and licensing issues could affect expected cash flow.

A useful owner-facing valuation summary looks at six core questions:

1. What earnings base is supportable? The appraiser rebuilds SDE and EBITDA from tax returns, financial statements, trial balances, payroll, general ledger detail, and other source documents.
2. How dependent is the business on the seller? A company where the owner sells, estimates, dispatches, performs field work, and manages key accounts usually requires a different earnings bridge than a company with transferable management depth.
3. What is the revenue mix? Emergency repair, maintenance, replacement, remodel, commercial construction, residential service, subcontract work, and warranty service can have different risk and cash-flow patterns.
4. How reliable are job costing, WIP, backlog, and working capital records? Project-heavy contractors need documentation that connects revenue, cost, change orders, retainage, billings, deposits, and cost to complete.
5. What risks could change future cash flow? Labor shortages, key licenses, customer concentration, insurance claims, bonding, safety programs, code compliance, warranty exposure, and fleet condition all matter.
6. Which valuation methods fit the purpose? A professional business appraisal may consider the market approach, discounted cash flow or other income approach methods, and the asset approach, then reconcile the evidence into a conclusion or calculation based on the engagement scope (AICPA & CIMA, n.d.; IVSC, n.d.; NACVA, n.d.).

The following table shows why similar revenue can lead to different valuation implications. It is qualitative only. It is not a multiple table.

Scenario	Earnings lens	Revenue mix	Owner dependence	Records and compliance	Qualitative valuation implication
A. Owner-operated repair shop	SDE likely important	One-time calls and seller relationships	High	Basic accounting, limited service-line reporting	Value support depends heavily on whether a buyer can replace the seller’s labor and relationships
B. Growing mixed-trade contractor	SDE and EBITDA both useful	Service, replacement, and light projects	Moderate	Better revenue categories, payroll detail, and job records	The SDE to EBITDA bridge can clarify transferable earnings and replacement management cost
C. Management-run multi-crew platform	EBITDA likely central	Repeat service, maintenance, replacement, and projects	Lower	Job costing, safety records, licenses, fleet, customer data, and working capital documented	Stronger evidence may support enterprise cash-flow analysis if diligence confirms the records
D. Project-heavy contractor with weak WIP	EBITDA may be volatile	Construction projects, change orders, retainage, subcontract work	Mixed	WIP, backlog, billings, and costs to complete are uncertain	Higher diligence risk may reduce weight on historical earnings even if revenue is large

The practical takeaway is simple: a plumbing business valuation or electrical contractor valuation should explain the earnings bridge before applying a formula. If the normalized earnings base is weak, a market approach multiple will not fix the problem. If the earnings base is strong but the business depends entirely on the seller, EBITDA may still need meaningful replacement management adjustments. If the business owns significant equipment but lacks transferable earnings, the asset approach may become more important.

What kind of business is being valued?

Before selecting valuation methods, the analyst needs to define the business. The U.S. Census Bureau and Office of Management and Budget’s 2022 NAICS Manual identifies Industry Group 2382 as building equipment contractors. The manual describes this group as establishments primarily engaged in installing or servicing equipment that forms part of a building mechanical system, including electricity, water, heating, and cooling, with work that may include new work, additions, alterations, maintenance, and repairs (U.S. Census Bureau & Office of Management and Budget, 2022).

Within that group, NAICS 238210 covers electrical contractors and other wiring installation contractors. NAICS 238220 covers plumbing, heating, and air-conditioning contractors (U.S. Census Bureau & Office of Management and Budget, 2022). A combined plumbing and electrical business may include activity that resembles both categories. However, NAICS is a classification system, not a business valuation model. It does not determine a company’s margin, risk, growth, EBITDA, SDE, or multiple.

Electrical contractor activity versus plumbing and HVAC activity

A business with “plumbing and electrical” in its name may perform residential repairs, commercial buildouts, panel upgrades, wiring, drain work, fixture replacement, water heater installation, service agreements, HVAC-adjacent work, or subcontracted project labor. A valuation should not assume the economic profile from the label. The appraiser should request revenue by trade, customer type, geography, job type, technician or crew, and month if available.

This matters because a company may have one set of books but several risk profiles inside those books. Electrical service calls may depend on licensed electricians and safety procedures. Plumbing repair may depend on emergency availability, parts inventory, and technician retention. Commercial project work may depend on bidding, change orders, general contractor relationships, retainage, and WIP discipline. Maintenance and service agreements may be more visible if contract terms, renewal history, billing practices, and customer transferability are documented.

Service work, maintenance work, replacement work, and construction projects

The valuation process should separate work type as much as the records allow. Service and repair revenue may be recurring in practice even if it is not contractually recurring. Maintenance agreements can be helpful evidence only if they are active, assignable, priced profitably, and supported by retention data. Replacement work may be seasonal or tied to demand cycles. Project work may produce high revenue but also large swings in gross margin, receivables, and working capital.

None of these categories is automatically better or worse. A project-heavy electrical contractor with strong estimating, job costing, change-order control, and backlog documentation may be more supportable than a service contractor with weak customer records. Conversely, a service-focused company with disciplined dispatch, trained technicians, diversified customers, and documented repeat work may support a cleaner forecast than a project contractor with disputed change orders. The valuation question is evidence, not labels.

Why a company name is not enough for a business appraisal

A professional business appraisal needs the actual subject interest. Is the valuation of equity or invested capital? Does the valuation include cash, debt, working capital, vehicles, tools, inventory, trade names, customer relationships, real estate, or separately appraised equipment? Is the purpose a sale, buyout, gift or estate matter, divorce, litigation, shareholder dispute, SBA-financed acquisition, internal planning, or financial reporting? NACVA, AICPA, IVSC, and ASA resources all point toward disciplined valuation practice, professional qualifications, and appropriate reporting or engagement scope rather than generic calculator output (AICPA & CIMA, n.d.; American Society of Appraisers, n.d.; IVSC, n.d.; NACVA, n.d.).

This is why a business appraisal starts with documents and purpose. A value conclusion for a 100 percent controlling interest in an operating company may not answer the same question as a minority interest in a partner dispute. A value used for lender underwriting may not be the same process or report as a planning estimate used before a sale. The methods may be familiar, but the scope and conclusion depend on the facts.

Why the SDE to EBITDA bridge matters

SDE and EBITDA are related, but they are not interchangeable. SDE is often used in smaller owner-operated businesses because it tries to show the economic benefit available to one full-time working owner. It may begin with pretax income and add back owner compensation, discretionary expenses, certain nonrecurring items, interest, depreciation, amortization, and other adjustments if they are supportable. CFI’s SDE materials describe the concept as a measure often used for small business analysis (Corporate Finance Institute, n.d.-b).

EBITDA, by contrast, focuses on earnings before interest, taxes, depreciation, and amortization. It is commonly used as a profitability and valuation metric, but it still requires careful normalization. CFI’s EBITDA materials explain the basic formula, while professional valuation sources provide the broader framework for deciding what adjustments are appropriate in a valuation engagement (AICPA & CIMA, n.d.; Corporate Finance Institute, n.d.-a; IVSC, n.d.; NACVA, n.d.).

For a small contractor where the buyer expects to work in the field and run the office, SDE may be highly relevant. For a larger contractor with field supervisors, dispatch staff, service managers, estimators, and less seller involvement, EBITDA may be more meaningful because the business should be able to generate earnings after paying for management. The bridge from SDE to EBITDA is therefore not a trick for increasing value. It is a translation from seller benefit to transferable enterprise earnings.

SDE for an owner-operated trade business

Consider a small plumbing and electrical repair company where the seller is the licensed owner, lead estimator, emergency contact, dispatcher, and sometimes a field technician. The tax return may show modest profit because the owner takes salary, runs some expenses through the company, and manages the business informally. SDE can help a buyer understand the total economic benefit if that buyer will step into the seller’s role.

Even then, SDE is not whatever the seller says it is. Add-backs need evidence. A one-time legal expense may be supportable if documents show it was nonrecurring and not related to ongoing operations. A personal vehicle expense may be rejected if the vehicle is actually required for business or if the documentation is weak. Family payroll may be adjusted only after the appraiser understands the work performed and what replacement cost would be. Owner compensation should not be double counted.

EBITDA for a management-run contractor

EBITDA becomes more central when the business is no longer simply a job for one owner. A multi-crew contractor may have service managers, licensed supervisors, dispatchers, bookkeepers, estimators, and a defined organization chart. Buyers and lenders may ask whether the company can run after the seller exits. In that setting, EBITDA is often a better starting point than SDE because it reflects earnings after paying the people needed to operate the business.

However, EBITDA can still be overstated. If the owner performs high-value management work but takes below-market salary, EBITDA may need a management compensation adjustment. If related-party rent is below market, rent may need normalization. If depreciation is added back, the analysis still needs to consider future capital expenditures for trucks, tools, software, safety equipment, and shop improvements. EBITDA is a useful metric, not a complete valuation.

Replacement management compensation

The most common misunderstanding in the SDE to EBITDA bridge is replacement management. Sellers often add back their entire salary to calculate SDE. That may be acceptable for an SDE calculation if the buyer is expected to replace the seller’s labor personally. It may not be acceptable for EBITDA if a buyer must hire a general manager, service manager, estimator, dispatcher, or licensed qualifier to replace what the seller did.

The appraiser should identify the seller’s actual roles, hours, licenses, relationships, and decision-making authority. Then the analysis should estimate which roles must be replaced and what the company would have to pay for those functions. That replacement cost reduces enterprise earnings. It is one reason a company can show high SDE but lower normalized EBITDA.

Hypothetical SDE to EBITDA bridge

The following calculation is hypothetical only. It is not a market multiple, not a valuation conclusion, and not a statement about typical contractor margins.

Hypothetical only: SDE to normalized EBITDA bridge

Book pretax income                                      $420,000
Add back owner salary included in expenses              $180,000
Add back documented nonrecurring legal expense            $35,000
Add back personal vehicle expenses rejected by buyer        $0
Estimated SDE before buyer review                       $635,000

Subtract market salary for replacement general manager  ($150,000)
Subtract normalized dispatcher role performed by seller  ($45,000)
Add back depreciation and amortization already included   $70,000
Normalize related-party rent to market                  ($25,000)
Estimated normalized EBITDA                             $485,000

This example shows why the bridge matters. The company did not become less real when EBITDA came in below SDE. The analysis simply recognized that a buyer who does not personally perform the seller’s work may need to pay others to do it. Conversely, if a company already has a management team and the seller is not essential to daily operations, the adjustment could be smaller. The correct answer depends on evidence.

Why add-backs are evidence, not wishes

Every add-back should answer three questions. First, did the expense actually occur in the historical financial statements? Second, is it nonrecurring, discretionary, nonoperating, or owner-specific under the valuation purpose and buyer perspective? Third, is the adjustment documented well enough that a buyer, lender, or appraiser can rely on it?

Unsupported add-backs create valuation risk. They can reduce the weight placed on management’s adjusted earnings, lead to a wider range of indicated values, or cause the appraiser to use more conservative assumptions. A seller who waits until the sale process to assemble add-back support may find that buyers do not accept adjustments that could have been documented earlier.

Normalizing earnings for plumbing and electrical contractors

Normalizing earnings means adjusting historical results to better reflect the economic performance relevant to the valuation purpose. It is not a license to remove every unpleasant expense. It is a disciplined process of identifying unusual, nonrecurring, nonoperating, discretionary, owner-specific, or market-level adjustments and then documenting them.

For plumbing and electrical contractors, normalization often goes beyond the income statement. The appraiser may review tax returns, financial statements, trial balances, general ledger detail, payroll records, owner compensation, credit card detail, bank statements, loan schedules, related-party transactions, lease agreements, insurance claims, warranty history, WIP schedules, backlog reports, retainage, deposits, and customer credits. Professional valuation standards and valuation-service resources support the need for appropriate procedures, documentation, assumptions, and reporting discipline, but they do not prescribe a one-size-fits-all adjustment list for every contractor (AICPA & CIMA, n.d.; IVSC, n.d.; NACVA, n.d.).

Adjustment category	Possible treatment	Evidence needed	Common risk
Owner compensation	Normalize to market replacement cost or add back in SDE analysis, depending on purpose	Payroll records, owner role description, hours, organization chart, replacement roles	Seller performed several jobs that cannot be replaced by one hire
Personal or discretionary expenses	Add back only if truly nonbusiness or discretionary and documented	General ledger, receipts, tax support, explanation of business purpose	Buyer rejects vague add-backs or expenses needed to operate
Related-party rent	Adjust to market rent if supportable	Lease, property details, market rent support, occupancy needs	Rent is above or below market, or real estate is outside scope
Nonrecurring legal or insurance items	Adjust if unusual and not expected to recur	Invoices, settlement documents, claim history, counsel input	Expense is actually part of ongoing risk
WIP and retainage	Reconcile revenue, cost, receivable, backlog, and cost to complete	WIP schedule, contracts, billings, change orders, retainage aging	Earnings are overstated on unfinished or disputed jobs
Warranty and callbacks	Normalize expected recurring exposure if material	Warranty claims, callback logs, service history, job records	Future costs are not reflected in EBITDA
Fleet, tools, and equipment	Separate depreciation add-back from future capital expenditure needs	Asset list, VINs, leases, liens, mileage, repair logs, replacement plan	Aging fleet requires near-term spending despite EBITDA add-back
Working capital	Analyze normal AR, AP, inventory, deposits, deferred revenue, payroll accruals	Balance sheets, aging reports, inventory lists, bank statements	Purchase price negotiations change if working capital is deficient

Weak bookkeeping can undermine both SDE and EBITDA

A contractor with strong field work can still have weak valuation support if the books do not connect revenue to cost. If revenue is recorded only as deposits arrive, if parts and labor are not tied to jobs, if credit card expenses lack detail, or if personal and business costs are mixed, the appraiser may not be able to rely fully on management’s adjusted earnings. Weak records do not mean the business has no value. They mean the valuation must handle greater uncertainty.

The issue is especially important when the company is moving from SDE to EBITDA. SDE can sometimes tolerate owner-operated informality because the buyer may be buying a job plus assets plus customer relationships. EBITDA requires clearer proof of enterprise earnings. Buyers who pay for EBITDA usually want evidence that earnings will continue without the seller doing unpaid or underpaid work.

Depreciation add-backs and future capital expenditures

EBITDA adds back depreciation and amortization by definition. That does not mean trucks, tools, lifts, diagnostic equipment, inventory systems, safety equipment, and software are free. A contractor with an old fleet may show healthy EBITDA while facing large replacement costs. A business appraisal or buyer model should distinguish the accounting add-back from the actual capital needed to maintain operations.

For this reason, an appraiser may analyze EBITDA, capital expenditures, working capital, and asset condition together. In a discounted cash flow analysis, future fleet replacement and tool purchases can reduce free cash flow. In the market approach, differences in included assets and required capital spending can affect comparability. In the asset approach, tangible assets and liabilities may be central.

Contractor value drivers that affect the selected valuation approach

A plumbing and electrical contractor’s value drivers are practical. Buyers pay for cash flow they believe can transfer. Appraisers analyze whether the historical and forecast cash flow is supportable. The value drivers below do not produce automatic premiums or discounts. They affect the evidence used in the valuation.

Value driver	Stronger evidence	Weaker evidence	Valuation relevance
Revenue mix	Monthly revenue by service line, trade, customer type, and job type	Total sales only	Supports forecast quality and market comparability
Labor depth	Licensed supervisors, trained technicians, dispatch capacity, cross-training	Seller is key technician, estimator, and relationship holder	Affects transferability and replacement management cost
Job costing	Gross margin by job and work type, labor and materials tied to jobs	Costs not tied to jobs, limited WIP support	Affects EBITDA quality and DCF assumptions
Backlog and WIP	Contracts, billings, cost to complete, change orders, retainage aging	Informal backlog list or disputed change orders	Affects future cash flow and working capital risk
Safety and compliance	Documented training, safety policies, incident history, insurance records	Unknown safety record or unresolved claims	Affects buyer diligence, insurability, and risk assessment
Customer concentration	Diversified customers, transferable relationships, assignable contracts	Few customers or referral sources dominate	Affects company-specific risk and forecast reliability
Fleet and equipment	Current list with liens, leases, condition, mileage, and replacement plan	Unclear ownership or deferred maintenance	Affects asset approach, capex, and deal structure
Working capital	Clean AR, AP, inventory, deposits, deferred revenue, and payroll accruals	Aging problems, missing schedules, or cash-basis confusion	Affects equity value and closing negotiations

Revenue quality matters more than headline sales

Two contractors can each produce the same annual revenue and have very different value support. One may have diversified residential and commercial service revenue, documented maintenance renewals, clean job-costing, and low customer concentration. Another may have a few large projects, disputed change orders, heavy retainage, and limited cost-to-complete support. The second company might have larger jobs and more visible backlog, but also more uncertainty.

Revenue quality is not simply recurring versus project. It includes gross margin stability, collection history, seasonality, customer transferability, pricing discipline, technician utilization, service area, and the company’s ability to staff the work. BLS Producer Price Index sources can provide official pricing index context for electrical contractors and plumbing, heating, and air-conditioning contractors, but PPI data does not establish a specific company’s margins, value, or valuation multiple (U.S. Bureau of Labor Statistics, n.d.-a, n.d.-b).

Labor depth and licenses affect transferability

ONET maintains public occupation profiles for electricians and for plumbers, pipefitters, and steamfitters. Those profiles are useful context for understanding that the labor base involves skilled trade roles, not interchangeable generic labor (ONET OnLine, n.d.-a, n.d.-b). For valuation, the appraiser does not need to turn occupational profiles into wage claims or revenue claims. The practical issue is whether the company has enough qualified people, supervision, and processes to perform work after the seller leaves.

If the owner holds a key license, supervises complex jobs, manages customer relationships, and trains technicians informally, transferability risk may be higher. If the company has licensed supervisors, documented training, a dispatch process, key employee retention, and clear delegation, buyers may have more confidence in normalized EBITDA. The value impact is fact-specific and should not be quantified without support.

Safety, insurance, bonding, and claims history

Electrical and construction work carry safety and compliance considerations. OSHA maintains an electrical safety overview, a construction standards landing page for 29 CFR Part 1926, and control of hazardous energy resources. OSHA also publishes an electrical hazards booklet that cautions readers that current standards, interpretations, and legal sources determine compliance responsibilities (OSHA, 2002, n.d.-a, n.d.-b, n.d.-c). NFPA maintains a code-development page for NFPA 70, the National Electrical Code (National Fire Protection Association, n.d.).

A valuation article should not turn those sources into legal advice. Instead, they support a diligence point: buyers and appraisers may review safety programs, training records, incident history, open citations if applicable, insurance claims, bonding, permits, code issues, and license transferability. These items can affect expected cash flow, risk assumptions, deal terms, and willingness to rely on management forecasts.

The three core valuation methods for a plumbing and electrical business

Professional valuation frameworks commonly discuss market, income, and asset-based approaches, with specific methods selected based on the subject and purpose (AICPA & CIMA, n.d.; IVSC, n.d.; NACVA, n.d.). In owner-facing terms, the three core valuation methods for a plumbing and electrical contractor are the market approach, discounted cash flow or another income approach method, and the asset approach.

Valuation method	What it asks	Contractor evidence needed	When it is useful	Major limitation
Market approach	What did comparable businesses sell for?	Normalized SDE or EBITDA, trade mix, revenue mix, size, geography, assets, working capital, deal terms	When reliable comparable transaction data exists	Comparables can be noisy, and denominators may differ
Discounted cash flow or income approach	What are expected future cash flows worth today?	Forecasts, margins, backlog, WIP, labor capacity, capex, working capital, risk assumptions	When future cash flow can be forecast with support	Sensitive to assumptions and terminal value inputs
Asset approach	What are adjusted net assets worth?	Fleet, tools, equipment, inventory, receivables, payables, debt, leases, working capital	Asset-heavy, distressed, early-stage, or weak-cash-flow cases	May understate going-concern value for profitable transferable businesses

Market approach in a contractor business appraisal

The market approach can be useful when the appraiser has credible data from sales of comparable businesses. Private transaction databases may provide sale price, revenue, earnings, and other metrics. BizComps, for example, is a business sale statistics database source that can support discussion of private transaction data categories, but its public product page does not provide a verified plumbing or electrical multiple range for this article (BizComps, n.d.).

The appraiser must know what the comparable transaction includes. Was it an asset sale or stock sale? Did the price include working capital? Were vehicles and equipment included? Was debt assumed? Was there a seller note, earnout, consulting agreement, noncompete, or rollover equity? Was the earnings denominator SDE, EBITDA, seller cash flow, or something else? A mismatch in denominator can distort the multiple.

Discounted cash flow and income approach analysis

A discounted cash flow analysis estimates future cash flows and discounts them to present value based on risk and timing. For a plumbing and electrical business, forecast assumptions may include service call volume, maintenance renewal behavior, project backlog, gross margin by job type, labor capacity, wage pressure, material costs, warranty claims, receivables, retainage, deposits, capital expenditures, and customer concentration. The DCF method can capture company-specific facts better than a generic multiple, but it is sensitive to assumptions.

A DCF should distinguish revenue growth from cash-flow growth. A contractor can grow sales while reducing free cash flow if it takes underpriced work, stretches labor too thin, builds receivables, delays fleet replacement, or accepts high-risk jobs with disputed change orders. Conversely, a contractor with modest revenue growth but strong job-costing, disciplined pricing, diversified customers, and lower owner dependence may have more supportable cash flow.

Asset approach for trucks, tools, inventory, and working capital

The asset approach can matter when tangible assets are significant, earnings are weak, the company is distressed, or transferability is uncertain. Plumbing and electrical businesses may own vehicles, tools, lifts, diagnostic equipment, inventory, computers, software, leasehold improvements, and trade-specific equipment. They may also have receivables, retainage, deposits, payables, accrued payroll, debt, leases, and contingent liabilities.

For a profitable going concern, the asset approach may serve as a reasonableness check rather than the primary indication. For a company with weak transferable earnings but valuable equipment, the asset approach may deserve more weight. A business valuation may not include a separate real estate appraisal or separate equipment appraisal unless that work is within scope or separately engaged.

Market approach: how to use comparables without abusing multiples

The market approach is appealing because it seems simple. If another contractor sold for a certain multiple, why not apply that multiple to your business? The problem is that private contractor deals are rarely identical, and the public headline often omits essential details.

Damodaran explains that earnings multiples are common and can be attractive because of their simplicity, but they can lead to errors when fundamentals and definitions are ignored (Damodaran, n.d.). That warning applies directly to contractor valuation. A multiple of SDE is not the same as a multiple of EBITDA. A price that includes working capital is not the same as a price that excludes it. A company with documented service agreements is not the same as a project-heavy company with disputed WIP. A management-run company is not the same as one where the seller is the business.

Filter	Question before using the comparable	Why it matters
Earnings denominator	Is the metric SDE, EBITDA, seller cash flow, revenue, or another measure?	Denominator mismatch distorts the multiple
Trade mix	Plumbing, electrical, HVAC, mechanical, or mixed specialty trades?	Different work types may carry different risk and asset intensity
Revenue mix	Service, maintenance, replacement, emergency, project, subcontract, or warranty work?	Repeatability and margins may differ
Size and management	Owner-operated shop or management-run multi-crew business?	Affects SDE versus EBITDA relevance
Geography and licensing	Same market, labor pool, licensing environment, and service radius?	Local risk and transferability can differ
Asset inclusion	Are vehicles, equipment, inventory, and working capital included?	Price may need adjustment before comparison
Deal terms	Cash, seller note, earnout, assumed debt, consulting agreement, or rollover?	Headline price may not equal cash-equivalent value
Date and market conditions	When did the transaction close, and what was the economic context?	Financing, labor, materials, and buyer demand change over time

A responsible article can teach owners what to ask without inventing a multiple. If a broker, buyer, or online calculator gives a range, the owner should ask: what data supports it, what denominator is used, how many comparable transactions are truly comparable, how old are they, and what adjustments are required? The best market approach analysis usually combines transaction evidence with judgment about risk and comparability. It does not copy a number from a chart.

Discounted cash flow: how service mix, backlog, and risk affect value

Discounted cash flow can be especially useful when the company’s future differs from the past. A contractor may be adding crews, shifting from project work to service agreements, expanding geographically, improving dispatch systems, losing a key customer, or facing fleet replacement needs. A DCF can model those changes if the assumptions are supportable.

The DCF begins with expected future cash flow, not just EBITDA. EBITDA may be adjusted for taxes, capital expenditures, working capital, debt-free or equity cash flow treatment, and other assumptions depending on the valuation model. The appraiser then selects a discount rate or capitalization rate consistent with the risk of the cash flows and the standard of value. The exact model should be explained in the business appraisal, along with key assumptions and limitations.

For plumbing and electrical contractors, the following forecast areas deserve attention:

• Revenue by work type: service calls, maintenance, replacement, construction projects, emergency repair, residential, commercial, and subcontract revenue.
• Gross margin by job type: labor utilization, materials, subcontractors, callbacks, warranty work, and price discipline.
• Backlog and WIP: contracts, billings, change orders, cost to complete, retainage, and disputed items.
• Labor capacity: technician availability, licensed supervision, overtime, training, turnover, and seller replacement.
• Working capital: receivables, payables, inventory, deposits, deferred revenue, payroll accruals, and seasonal cash needs.
• Capital expenditures: vehicles, tools, safety equipment, software, leasehold improvements, and shop needs.
• Risk factors: customer concentration, safety history, insurance claims, permits, licenses, bonding, warranties, and key employees.

The following example is hypothetical and simplified. It does not calculate a value and does not imply a multiple.

Hypothetical only: DCF driver comparison, not a valuation conclusion

Company A: project-heavy contractor with weak WIP support
Year 1 normalized EBITDA: $500,000
Forecast issue: higher margin uncertainty, larger receivables, more retainage, and higher working capital needs
Risk result: higher company-specific risk may reduce supported value if diligence confirms the uncertainty

Company B: documented service-focused contractor with management depth
Year 1 normalized EBITDA: $500,000
Forecast issue: more visible service revenue, better labor scheduling, documented capex plan, and cleaner customer data
Risk result: stronger evidence may support lower risk assumptions if due diligence confirms transferability

Important: the difference comes from supportable forecast evidence, not from a generic industry multiple.

Discount rate and company-specific risk

A discount rate should match the cash flow being discounted. A forecast based on debt-free cash flow calls for a different analysis than a forecast based on equity cash flow. A mature, documented service contractor with diversified customers may support different risk assumptions than a project contractor with customer concentration and uncertain cost to complete. Public data sources, private transaction data, company-specific risk analysis, and professional judgment may all play roles, but the final assumptions must be explained.

Owners should be cautious when someone states a discount rate without showing the underlying logic. In contractor valuation, risk is not abstract. It lives in receivables, backlog, labor, licenses, customer relationships, safety programs, warranties, debt, equipment, and the owner’s role.

Asset approach: when tangible assets and working capital matter

The asset approach asks what the company’s assets and liabilities are worth after appropriate adjustments. It can be especially relevant when earnings are weak, the business is asset-heavy, the company is early-stage, or the value of tangible assets may exceed the value indicated by income methods. It can also be useful as a reasonableness check for a profitable contractor.

Asset and working-capital checklist

• Fleet list with VINs, mileage, leases, liens, titles, condition, and maintenance history.
• Major tools, lifts, diagnostic equipment, safety equipment, computers, and software.
• Inventory listing, obsolete parts, slow-moving materials, and job-specific inventory.
• Accounts receivable aging, retainage aging, collection history, and bad-debt experience.
• Accounts payable, accrued payroll, taxes payable, credit cards, customer deposits, and deferred revenue.
• WIP schedule, contracts, billings, change orders, cost-to-complete estimates, and disputed items.
• Warranty obligations, service callbacks, open claims, and unresolved customer credits.
• Shop, warehouse, yard, vehicle, and equipment leases.
• Insurance claims, litigation, OSHA citations if applicable, and contingent liabilities.
• Separate real estate or equipment appraisal needs if outside the business appraisal scope.

Working capital deserves special attention because deal value and closing proceeds can differ. A buyer might agree on enterprise value but negotiate a working capital target, debt payoff, cash retained by the seller, or adjustment for excess or deficient working capital. A company with strong EBITDA but slow receivables, large retainage, or underrecorded deposits may not deliver the same economic value at closing as the headline number suggests.

Asset value versus going-concern value

A profitable contractor may be worth more than the adjusted value of its vehicles, tools, and working capital because it has trained employees, customer relationships, systems, brand, and goodwill. A struggling contractor may be worth closer to adjusted net assets if cash flow is weak or not transferable. The appraiser should reconcile the asset approach with income and market evidence rather than assuming one method always controls.

Safety, licensing, code, and labor risk in valuation

Contractor valuation includes operational risk because operational risk affects expected cash flow. Plumbing and electrical work may involve skilled labor, code-sensitive work, safety procedures, permits, insurance, and customer trust. These issues do not automatically reduce value, but they can change buyer diligence and risk assumptions.

Electrical safety and lockout/tagout diligence

OSHA’s electrical overview and control of hazardous energy resources provide official safety context. OSHA’s 2002 electrical hazards publication also cautions that the booklet is a generic overview and that current standards and interpretations determine compliance responsibilities (OSHA, 2002, n.d.-a, n.d.-c). For valuation, the point is not to give compliance advice. The point is that buyers may ask whether the company has a safety program, training records, incident history, proper equipment, and procedures that reduce operational disruption.

A company with documented safety practices and insurance history may give buyers more confidence than a company with unknown practices or unresolved incidents. Any value effect still needs to be based on facts. A valuation report should not assign a blanket discount simply because the company performs electrical work.

Plumbing and mechanical labor depth

PHCC’s national association presence and ONET occupation profiles are useful context for the skilled nature of plumbing, heating, cooling, and related trade work (ONET OnLine, n.d.-b; Plumbing-Heating-Cooling Contractors National Association, n.d.). In valuation, labor depth means more than headcount. It means whether the company can schedule, supervise, train, and retain qualified people. It also means whether key employees are likely to stay after a sale.

If the owner is the only person who can estimate complex work, supervise crews, hold relationships, and solve field problems, the buyer may treat EBITDA cautiously. If the company has documented processes and multiple qualified leaders, the appraiser may have more support for transferable earnings. Again, the analysis is fact-specific.

Licenses, permits, and code compliance

Licensing and permit rules vary by jurisdiction and should be confirmed with local advisers. A valuation article should not state legal requirements beyond verified sources. What it can say is that buyers and appraisers commonly review licenses, permits, open violations, inspection issues, code-related disputes, and transferability of key operating requirements. NFPA’s NEC code-development page supports the high-level idea that electrical code development is a formal and important field, but it should not be used to state detailed code requirements without reviewing the specific code and jurisdiction (National Fire Protection Association, n.d.).

Insurance, bonding, claims, and open disputes

Insurance claims, bonding capacity, lawsuits, warranty disputes, and open customer claims can affect value because they can affect future cash flow, risk, and deal structure. A buyer may ask for representations, escrows, indemnities, price adjustments, or exclusions for unresolved liabilities. An appraiser may adjust cash flow, risk assumptions, or method weighting if the evidence shows material exposure.

SBA-financed acquisitions and lender-requested valuations

Some buyers of plumbing and electrical businesses use SBA financing. If SBA financing is involved, the buyer and seller should confirm current requirements with the lender, SBA adviser, CPA, attorney, and valuation professional. SBA rules are lender-program requirements and should not be applied to every private transaction.

The SBA’s official SOP 50 10 landing page was rechecked during Phase 3 drafting, and it linked to SOP 50 10 8 technical updates effective June 1, 2025 (U.S. Small Business Administration, n.d., 2025). In the change-of-ownership context, the SOP text reviewed in Phase 1B states that determining the value of a business, not including real estate separately valued through a real estate appraisal, is a key component of the analysis of any loan application for a change of ownership. It also states that the business valuation must be requested by and prepared for the lender and that the lender may not use a business valuation prepared for the applicant or the seller (U.S. Small Business Administration, 2025).

That SBA point has two practical implications. First, a seller’s planning valuation can be useful for setting expectations, but it may not satisfy lender-requested valuation requirements in an SBA-financed acquisition. Second, real estate and certain equipment questions may require separate appraisal work depending on the lender’s requirements and transaction structure. The correct process should be confirmed directly with the lender because current policy, internal bank procedures, property type, financing amount, and transaction facts can matter.

Case study 1: Owner-operated repair shop moving from SDE to EBITDA

This case study is hypothetical.

A small company provides residential plumbing repairs, minor electrical repairs, and emergency service in a local market. The owner holds key relationships, answers after-hours calls, estimates larger jobs, supervises technicians, and helps in the field when needed. The company has basic accounting records and tax returns, but revenue is not consistently separated by plumbing, electrical, emergency service, replacement work, and small projects.

The seller believes the company should be valued from SDE because a buyer can step into the owner’s role. That may be a reasonable starting point for an owner-operator buyer. The appraiser begins with book income, adds back supportable owner compensation and documented discretionary expenses, and reviews nonrecurring items. The appraiser also rejects unsupported add-backs for costs that appear necessary to operate the business.

When the same company is viewed through EBITDA, the analysis changes. A buyer who will not personally replace the owner must hire or retain management, dispatch, estimating, and technical supervision. Replacement management compensation reduces EBITDA. If the owner is the key license holder or primary referral source, the appraiser may also consider transferability risk in the selected methods and assumptions.

The lesson is not that SDE is wrong or EBITDA is right. The lesson is that each metric answers a different question. SDE may explain the opportunity for a working owner. EBITDA may explain transferable enterprise earnings after paying for the people needed to operate the company.

Case study 2: Multi-crew contractor where EBITDA becomes central

This case study is hypothetical.

A combined plumbing and electrical contractor has multiple crews, licensed supervisors, a service manager, dispatch software, monthly financial statements, revenue by service line, and documented customer history. The seller is involved in strategy and key relationships but no longer handles daily dispatch or field supervision. The company separates residential service, commercial service, maintenance, replacement, and project work.

In this setting, EBITDA becomes more central because the company already pays for much of the management needed to run the business. The appraiser still normalizes owner compensation, related-party expenses, nonrecurring items, depreciation, amortization, and other adjustments. But the replacement management adjustment may be smaller than in the owner-operated example.

The market approach may be useful if comparable transaction data is available and truly comparable. A discounted cash flow analysis may also be useful because the company’s records support forecasts by service line, labor capacity, gross margin, working capital, and capex. The asset approach may serve as a reasonableness check for fleet, tools, equipment, inventory, and working capital.

The lesson is that EBITDA becomes more persuasive when it is backed by systems, people, and records. Buyers do not pay for the word EBITDA. They pay for supportable cash flow that can continue after closing.

Case study 3: Project-heavy contractor with backlog and WIP risk

This case study is hypothetical.

A commercial electrical and plumbing subcontractor reports strong revenue and attractive adjusted EBITDA. The company has several large projects in progress, significant retainage, change orders awaiting approval, and a backlog schedule prepared by management. However, job-costing reports are incomplete, cost-to-complete estimates are inconsistent, and some change orders are disputed.

The appraiser does not automatically accept management’s EBITDA. Instead, the valuation analysis reviews contracts, billings, costs incurred, estimated cost to complete, retainage, disputed change orders, warranty exposure, and receivable aging. If the evidence suggests that margins may reverse on unfinished jobs, historical EBITDA may receive less weight. The DCF may require higher risk assumptions, lower projected margins, or working-capital adjustments.

The market approach also becomes harder. A comparable service contractor with clean recurring revenue may not be comparable to a project-heavy subcontractor with disputed WIP. A transaction multiple from another industry or work type could be misleading. The asset approach and working-capital analysis may become more important because receivables, retainage, deposits, payables, and equipment affect the real economics of the transaction.

The lesson is that high revenue does not guarantee high value. Backlog and WIP are valuable only when they are profitable, collectible, and supported.

Case study 4: Strong assets but weak transferable earnings

This case study is hypothetical.

A contractor owns a strong fleet, tools, lifts, and a well-located shop. The balance sheet shows meaningful tangible assets. However, the company has inconsistent profits, weak service-line reporting, heavy owner dependence, and customer relationships that may not transfer. The seller argues that the equipment alone should support a high price.

The appraiser considers the asset approach carefully. Fleet and tools matter, but the appraiser also reviews liens, leases, condition, mileage, repair history, inventory quality, receivables, payables, customer deposits, warranty claims, and debt. If equipment values are material and outside the business valuation scope, a separate equipment appraisal may be needed.

The income approach may indicate lower value if normalized EBITDA is weak or uncertain. The market approach may be limited if comparable sales assume transferable earnings that this company does not have. The final conclusion depends on reconciling the evidence, not simply adding a goodwill premium to asset value.

The lesson is that tangible assets can support value, but buyers usually care about what those assets earn. A fleet that is busy, maintained, and supported by transferable customer demand is different from a fleet attached to owner-dependent revenue.

Seller preparation: how to support a stronger valuation 12 to 24 months before exit

Owners who want a stronger, more defensible valuation should begin before they are ready to sell. The best preparation is not cosmetic. It is operational and documentary. A buyer or appraiser should be able to understand how the company makes money, who makes it happen, and what risks could change future cash flow.

Document request checklist for a contractor valuation

• Federal tax returns and year-end financial statements for at least the requested historical period.
• Monthly profit and loss statements, balance sheets, trial balances, and general ledger detail.
• Payroll records, owner compensation detail, family employee roles, benefits, and contractor payments.
• Revenue by trade, service line, job type, customer type, and month if available.
• Job-costing reports, WIP schedules, backlog, billings, cost-to-complete estimates, change orders, and retainage.
• Customer list, top customer report, customer concentration, contracts, service agreements, and assignment terms.
• Licenses, permits, safety policies, training records, OSHA logs or citations if applicable, insurance, and bonding.
• Fleet, tools, inventory, leases, liens, titles, mileage, condition, and capital expenditure history.
• Accounts receivable aging, accounts payable aging, inventory, deposits, deferred revenue, and other working-capital schedules.
• Owner role description, organization chart, key employee list, compensation, retention issues, and management succession plan.
• Related-party transactions, leases, personal expenses, nonrecurring items, litigation, claims, and contingent liabilities.

Clean up accounting and service-line reporting

A seller who can show revenue and gross margin by service line gives buyers more confidence than one who can show only total sales. Start by separating plumbing, electrical, maintenance, repair, replacement, projects, emergency work, residential, commercial, and subcontract work if the accounting system allows it. Tie labor and materials to jobs. Reconcile tax returns to internal statements. Remove personal expenses from the business or document them clearly.

Reduce owner dependence

Owner dependence is one of the biggest issues in moving from SDE to EBITDA. A seller can reduce that risk by documenting processes, delegating estimating and dispatch, training supervisors, retaining licensed employees, strengthening customer records, and building a management team. The goal is not to make the owner irrelevant overnight. It is to make the company’s cash flow more transferable.

Professional CTA

If you need an independent business valuation for a plumbing, electrical, or combined specialty trade contractor, Simply Business Valuation can help evaluate normalized SDE, EBITDA, valuation methods, risk factors, and supportable value evidence in a professional valuation report. A valuation cannot promise a sale price, financing approval, tax result, legal conclusion, or specific multiple, but it can help owners, buyers, attorneys, CPAs, and lenders understand the evidence before negotiations begin.

Buyer diligence: what to test before paying for EBITDA

Buyers should rebuild earnings from source documents rather than accepting seller adjustments at face value. This does not mean assuming the seller is wrong. It means verifying the earnings base that supports the price.

A buyer should test owner compensation, family payroll, related-party rent, discretionary expenses, nonrecurring items, revenue recognition, job costing, WIP, backlog, retainage, receivables, deposits, warranties, leases, fleet condition, licenses, permits, safety records, insurance claims, bonding, and key employee retention. If SBA or other third-party financing is involved, the buyer should coordinate with the lender early because lender-requested valuation requirements, appraisal requirements, and underwriting procedures may affect timing.

What to test before accepting SDE

For SDE, buyers should test whether the seller’s claimed add-backs are real, documented, and relevant. If the seller adds back auto expenses, ask who uses the vehicles and whether they are needed for operations. If the seller adds back family payroll, ask what work family members performed. If the seller adds back legal expenses, ask whether the issue is truly resolved. If the seller adds back rent, ask whether the facility is needed and what market rent would be.

What to test before accepting EBITDA

For EBITDA, buyers should test whether management compensation is normal, whether depreciation add-back hides required capex, whether revenue recognition is reliable, whether WIP is profitable, whether receivables are collectible, and whether the owner is still providing unpaid labor. EBITDA can be a powerful valuation metric only when it represents transferable earnings.

Valuation conclusion: the earnings bridge matters because buyers pay for transferable cash flow

The move from SDE to EBITDA is one of the most important steps in valuing a plumbing and electrical business because it changes the lens from owner benefit to enterprise earnings. SDE can be useful for an owner-operated buyer. EBITDA can be useful for a management-run company, lender review, or strategic acquisition. Neither metric is automatically superior. The right lens depends on the business, buyer, purpose, and evidence.

A supportable valuation usually improves when the company has clean financials, defensible add-backs, lower owner dependence, documented service-line revenue, reliable job costing, credible WIP and backlog, labor depth, safety and compliance discipline, transferable customer relationships, current fleet records, and clear working-capital schedules. A generic online multiple cannot replace that analysis.

For owners, the practical advice is to prepare early. Build records that show how the business makes money without relying entirely on the seller. For buyers, the advice is to verify the bridge from SDE to EBITDA before paying for enterprise earnings. For advisers, the advice is to match valuation methods to purpose and evidence, then document the assumptions clearly.

Simply Business Valuation can assist with independent business valuation analysis for plumbing, electrical, and other specialty trade contractors. A professional valuation report can help frame normalized earnings, market approach evidence, discounted cash flow assumptions, asset approach considerations, and contractor-specific risk factors in a format suitable for informed decision-making.

FAQ

1. What is the best way to value a plumbing and electrical business?

The best way is to define the valuation purpose, normalize earnings, decide whether SDE, EBITDA, or both are relevant, evaluate risk and transferability, and apply appropriate valuation methods. A professional business appraisal may consider the market approach, discounted cash flow or another income approach method, and the asset approach, then reconcile the evidence based on scope and purpose (AICPA & CIMA, n.d.; IVSC, n.d.; NACVA, n.d.).

2. Should I use SDE or EBITDA for a plumbing business valuation?

It depends on owner involvement, buyer type, size, and management depth. SDE may be useful for a small owner-operated shop where a buyer expects to replace the seller’s labor. EBITDA often becomes more useful when the company has transferable management, multiple crews, lender scrutiny, or strategic buyer interest. The best analysis often shows both and explains the bridge.

3. Does moving from SDE to EBITDA increase value?

No. Moving from SDE to EBITDA does not increase value by itself. It clarifies the earnings base after normalizing discretionary items, owner compensation, replacement management, depreciation, amortization, related-party costs, and other adjustments. Value still depends on cash flow, growth, risk, assets, transferability, and comparable evidence.

4. What multiple is an electrical contractor worth?

This article does not publish a universal electrical contractor multiple because no credible universal current range was verified for publication. A selected multiple should be supported by comparable transaction data, normalized earnings, denominator consistency, company size, work mix, customer concentration, assets, working capital, growth, risk, and deal terms. Damodaran’s discussion of earnings multiples supports caution against using multiples without consistent definitions and fundamentals (Damodaran, n.d.).

5. Why can revenue multiples mislead contractor owners?

Revenue does not show profitability, owner dependence, job-costing quality, WIP risk, receivable collection, customer concentration, safety issues, asset condition, working capital, or capital expenditure needs. Two contractors with the same revenue can have very different normalized EBITDA and risk.

6. What add-backs are common in contractor valuations?

Possible add-backs or adjustments may involve owner compensation, family payroll, related-party rent, nonrecurring legal or insurance items, documented discretionary expenses, depreciation, amortization, and market-level rent or management compensation. Each adjustment must be supported. Buyers, lenders, and appraisers may reject weak or undocumented add-backs.

7. How do WIP and backlog affect value?

WIP and backlog affect forecast reliability, margin quality, working capital, receivables, retainage, and risk. A backlog schedule is stronger when supported by contracts, billings, change orders, cost-to-complete estimates, and customer status. Informal backlog can be useful context, but it is weaker valuation evidence.

8. How does discounted cash flow apply to a plumbing or electrical contractor?

Discounted cash flow estimates future cash flows and discounts them to present value based on risk and timing. For contractors, forecast assumptions may include service mix, backlog, WIP, gross margin, labor capacity, working capital, capex, warranty exposure, customer concentration, and safety or licensing risk. The method is useful when assumptions are supportable, but it is sensitive to inputs.

9. When does the asset approach matter most?

The asset approach may matter most for asset-heavy, distressed, early-stage, low-earnings, or weak-transferability contractors. It can also serve as a reasonableness check for profitable businesses. Important assets and liabilities include fleet, tools, inventory, receivables, retainage, payables, debt, leases, deposits, and deferred revenue.

10. Can safety or licensing issues reduce business value?

They can affect buyer risk, insurability, transferability, expected cash flow, and deal terms, but the value effect must be based on facts. OSHA, NFPA, licensing, insurance, and legal issues should be reviewed with qualified advisers. A valuation should not assign a generic discount without evidence.

11. Do NAICS codes determine business value?

No. NAICS codes classify business activity. The 2022 NAICS Manual identifies electrical contractors under NAICS 238210 and plumbing, heating, and air-conditioning contractors under NAICS 238220, but classification does not determine value, margins, risk, or multiples (U.S. Census Bureau & Office of Management and Budget, 2022).

12. Can SBA financing require a business valuation for a contractor acquisition?

In SBA-financed change-of-ownership contexts, current SBA SOP requirements should be confirmed with the lender and advisers. The SOP 50 10 8 technical updates reviewed for this article state that the business valuation must be requested by and prepared for the lender and that the lender may not use a valuation prepared for the applicant or seller (U.S. Small Business Administration, 2025). SBA requirements should not be generalized to non-SBA transactions.

13. What documents should I prepare before ordering a business appraisal?

Prepare tax returns, financial statements, trial balances, general ledger detail, payroll records, revenue by service line, job-costing reports, WIP, backlog, retainage, change orders, customer data, service agreements, licenses, permits, safety records, insurance claims, fleet lists, equipment lists, inventory, leases, debt, and working-capital schedules.

14. How can I make my plumbing and electrical business more transferable before a sale?

Reduce owner dependence, document processes, delegate estimating and dispatch, train supervisors, retain qualified employees, separate revenue by service line, improve job costing, build customer records, clean up add-backs, document licenses and safety practices, and maintain fleet and working-capital schedules.

15. Should I get a professional valuation before selling?

Often yes. A professional business valuation can help identify supportable SDE, normalized EBITDA, valuation methods, risk factors, asset and working-capital issues, and diligence gaps before negotiations begin. It cannot guarantee a sale price or financing outcome, but it can help owners and advisers make better-informed decisions.

References

AICPA & CIMA. (n.d.). Statement on Standards for Valuation Services (VS Section 100). https://www.aicpa-cima.com/resources/download/statement-on-standards-for-valuation-services-vs-section-100

American Society of Appraisers. (n.d.). Business valuation (BV). https://www.appraisers.org/disciplines/business-valuation-BV

BizComps. (n.d.). BIZCOMPS: Business sale statistics. https://bizcomps.com/

Corporate Finance Institute. (n.d.-a). EBITDA margin. https://corporatefinanceinstitute.com/resources/valuation/ebitda-margin/

Corporate Finance Institute. (n.d.-b). Seller’s discretionary earnings. https://corporatefinanceinstitute.com/resources/accounting/sellers-discretionary-earnings/

Damodaran, A. (n.d.). Chapter 18: Earnings multiples. New York University Stern School of Business. https://pages.stern.nyu.edu/~adamodar/pdfiles/valn2ed/ch18.pdf

International Valuation Standards Council. (n.d.). International valuation standards. https://ivsc.org/standards/

National Association of Certified Valuators and Analysts. (n.d.). NACVA professional standards and ethics. https://www.nacva.com/standards

National Fire Protection Association. (n.d.). NFPA 70, National Electrical Code code development. https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70

O*NET OnLine. (n.d.-a). Electricians: Summary report for 47-2111.00. https://www.onetonline.org/link/summary/47-2111.00

O*NET OnLine. (n.d.-b). Plumbers, pipefitters, and steamfitters: Summary report for 47-2152.00. https://www.onetonline.org/link/summary/47-2152.00

Plumbing-Heating-Cooling Contractors National Association. (n.d.). PHCC. https://www.phccweb.org/

U.S. Bureau of Labor Statistics. (n.d.-a). PPI industry data for electrical contractors and other wiring installation contractors, series PCU23821X23821X. https://data.bls.gov/timeseries/PCU23821X23821X

U.S. Bureau of Labor Statistics. (n.d.-b). PPI industry data for plumbing, heating and air-conditioning contractors, series PCU23822X23822X. https://data.bls.gov/timeseries/PCU23822X23822X

U.S. Census Bureau & Office of Management and Budget. (2022). North American Industry Classification System, United States, 2022. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf

U.S. Department of Labor, Occupational Safety and Health Administration. (2002). Controlling electrical hazards [PDF]. https://www.osha.gov/sites/default/files/publications/OSHA3075.pdf

U.S. Department of Labor, Occupational Safety and Health Administration. (n.d.-a). Electrical. https://www.osha.gov/electrical

U.S. Department of Labor, Occupational Safety and Health Administration. (n.d.-b). 1926 safety and health regulations for construction. https://www.osha.gov/laws-regs/regulations/standardnumber/1926

U.S. Department of Labor, Occupational Safety and Health Administration. (n.d.-c). Control of hazardous energy (lockout/tagout). https://www.osha.gov/control-hazardous-energy

U.S. Small Business Administration. (n.d.). Lender and development company loan programs. https://www.sba.gov/document/sop-50-10-lender-development-company-loan-programs

U.S. Small Business Administration. (2025). SOP 50 10 8 technical updates effective June 1, 2025 [DOCX]. https://www.sba.gov/sites/default/files/2025-05/SOP%2050%2010%208%20Technical%20Updates%20effective%206.1.2025.docx