Selling an HVAC or plumbing business

Define the business a buyer is actually underwriting

"HVAC company" and "plumbing company" are not operating models. One company may be primarily residential repair with a large maintenance membership base; another may install equipment in new construction; another may combine commercial service, replacement, plumbing, drain, refrigeration, or controls. Before discussing value, produce a service-mix bridge that connects each defined category to revenue, direct cost, gross margin, customer type, geography, seasonality, working capital, and responsible team.

The Census Bureau groups plumbing, heating, and air-conditioning contractors under NAICS 238220 and notes that work can include installation, service, maintenance, repair, additions, and alterations. ¹ That classification is useful for scope, not valuation: the mix within the code can produce very different economics and risks.

Compare this service-business evidence with other sector-specific owner decisions in the industry field-guide desk.

Write the owner's current job description. Does the owner sell replacement systems, estimate commercial projects, maintain key accounts, hold a required license, supervise technicians, dispatch after hours, approve purchasing, or manage cash? Identify who performs each task, how much time it requires, which credentials are needed, and what it would cost to replace. A business that cannot explain the post-owner operating model is not ready to support a maintainable earnings claim.

Reconcile earnings from the job ticket up

Start with three years of monthly financial statements, tax returns, general-ledger detail, current year-to-date results, and bank reconciliations. Tie revenue to the field-service or dispatch platform and define when a job is sold, performed, invoiced, and collected. Reconcile technician payroll, commissions, materials, equipment, subcontractors, permits, warranties, callbacks, rebates, memberships, fleet, and inventory.

Job-level gross margin is meaningful only when the cost rule is consistent. If one division assigns technician payroll, truck cost, or warranty work differently from another, the comparison can mislead. Document category definitions and reconcile them to the general ledger. Show maintenance agreement cohorts by start period, renewal, cancellation, service usage, and deferred obligation rather than presenting the total agreement count as guaranteed recurring revenue.

The shared valuation evidence chain behind this vertical analysis appears in the general owner-value guide.

Proposed earnings adjustments need a schedule. For each item, show the account, period, amount, invoice or payroll support, business purpose, reason it changes, and expected post-close treatment. Owner compensation is not one automatic add-back. Replacement cost may be required for sales, estimating, license coverage, technical supervision, or general management. AICPA valuation resources reinforce the need for defined scope, methods, assumptions, and support in professional valuation work. ²

• Reconcile invoiced and collected revenue to job, dispatch, and bank records.
• Use one documented cost rule for technician labor, fleet, warranties, and callbacks.
• Show maintenance-agreement cohorts, renewals, cancellations, usage, and deferred obligations.
• Support each earnings adjustment with its account, period, evidence, and post-close treatment.

A worked service-company earnings bridge

Hypothetical example—not a market multiple, appraisal, or estimate for a real company. Northline Mechanical reports $900,000 of EBITDA. The reviewer proposes adding $90,000 of documented personal and nonoperating owner costs, subtracting $140,000 for a general manager who would replace work still performed by the owner, adding $35,000 for a completed one-time dispatch-software implementation, and subtracting $45,000 for an inventory and callback cost that the latest period did not capture consistently.

Provisional normalized EBITDA is $900,000 + $90,000 - $140,000 + $35,000 - $45,000 = $840,000.

None of those adjustments is automatic. The general-manager cost needs a job description, market support, benefit load, and explanation of any owner duties it does not replace. The software invoices must show that implementation is complete while ongoing subscription and training remain in expenses. Inventory and callback treatment should reconcile to job records and the accounting policy.

For sensitivity only, assume invented factors of 4.0 and 5.5 times the $840,000 result. The enterprise-value scenarios would be $3.36 million and $4.62 million. Those factors are not observed HVAC or plumbing multiples and are not a market range. Debt, cash, working capital, customer deposits, deferred membership obligations, vehicle or equipment leases, earnout, rollover, escrow, taxes, and expenses can materially change cash at close and net proceeds.

Show that customers and work can transfer

Build customer cohorts by service line, geography, residential/commercial classification, first service date, last service date, revenue, margin, agreement status, and concentration. Avoid publishing customer identities or sensitive addresses. A buyer may test whether work comes from repeat service, membership, referral, paid lead, manufacturer or home warranty channel, property manager, general contractor, or a small number of commercial accounts. The source and terms of demand matter as much as the word recurring.

Operational evidence should include booking and cancellation, call conversion if reliably measured, average ticket by defined category, technician utilization, first-time completion, callback and warranty policy, after-hours coverage, backlog, open estimates, permit status, purchasing, inventory, fleet maintenance, and capacity by role. Do not turn every dashboard metric into a valuation claim; use it to explain how the company performs and where the result depends on one person, channel, season, or undocumented practice.

Workforce evidence deserves special care. BLS describes HVAC mechanics and installers as a trained occupation in which workers may need a license or certification, and it describes plumbing as commonly apprenticeship-based with state and local licensing requirements. ³⁴ National employment statistics do not establish the company's labor shortage, wage, or value. The seller should use its own open-role history, tenure, compensation, certifications, productivity, turnover, and geography.

Treat licenses, refrigerant, and safety records as operating assets

For HVAC work that can release regulated refrigerants, EPA states that technicians must hold Section 608 certification and describes related proof and recordkeeping requirements. ⁵⁶ A seller should inventory technician certification types, copies, employment status, refrigerant purchasing controls, required invoices or service records, and any open compliance matter. The buyer and counsel must confirm what remains valid, what belongs to an individual, and what the company must maintain.

Plumbing contractor and individual licensing varies by state and locality. BLS notes that most states require plumbers to be licensed and that some require master-plumber status for a contractor license. ⁴ That is a starting point, not a state-specific conclusion. Identify the license holder, qualifying-party role, ownership or employment requirement, renewal, disciplinary history, and transition plan with local counsel and the relevant authority.

Safety records also belong in the sale file. OSHA explains that many employers above applicable thresholds must maintain injury and illness records and sets broader employer responsibilities for training and hazard communication. ⁷⁸ Determine which rules apply; do not assume a record is required or exempt. Prepare OSHA logs where applicable, workers' compensation history, vehicle incidents, safety programs, training, claims, and material investigations under a counsel-approved disclosure process.

Model seasonality and working capital before signing an LOI

Monthly results can reveal weather-driven demand, maintenance cycles, construction schedules, rebate timing, inventory purchases, customer deposits, accounts receivable, retainage, and payable swings that a trailing-twelve-month total hides. Build a monthly working-capital schedule using the proposed purchase-agreement definitions. Separate normal operations from debt-like, transaction, owner, and unusual items.

A membership payment received before service may create cash and a future obligation. A large replacement deposit may be associated with equipment ordered but not installed. Commercial projects may include retainage or unbilled work. A buyer and seller can disagree about which items remain with the company and the level needed to deliver a normal operation.

Resolve the accounting definition and measurement period early, with deal and accounting specialists, instead of treating working capital as a closing-day detail.

To place this operating evidence beside the available industry-specialist coverage, use the disclosed vertical-specialist practice map.

Reconcile cash conversion by service line as well. Show when a customer is quoted, deposits, when equipment or materials are ordered, when work is completed, when invoices are issued, and when cash arrives. This timeline distinguishes profitable work that temporarily consumes cash from margin or collection problems. Use the company's actual records; an industry average cannot replace its billing and purchasing cycle.

Use a controlled sale sequence

Define owner goals and sale route; reconcile earnings and job-level data; map owner replacement, licenses, and key people; resolve material financial, legal, safety, fleet, inventory, customer, and compliance issues; choose the appropriate valuation and advisor scope; prepare a confidential information package; qualify buyers; compare indications and letters of intent; complete staged diligence; negotiate definitive documents; and execute employee, customer, vendor, license, fleet, data, and owner handoffs.

SBA acquisition guidance emphasizes valuation, complete asset and liability schedules, pre-close access, sale-agreement detail, permits, and legal review. ⁹ It is general guidance, not a substitute for trade, state, environmental, tax, or transaction counsel. In a covered asset sale, Form 8594 can require buyer and seller reporting of allocation when goodwill or going-concern value attaches or could attach. ¹⁰

Compare offers on cash at close, financing, working-capital peg and definition, debt and debt-like items, customer deposits, deferred revenue, fleet and equipment, real estate, seller note, earnout, rollover, escrow, employment, license support, restrictive terms where lawful, taxes, and transition. Stress-test contingent value and the owner's required role.

Interview a sector advisor without outsourcing judgment

Cetane Associates, a Greenwood-affiliated firm, publicly identifies propane/delivered fuels, HVAC/plumbing, pest control, lawn care, landscaping, and route-based service companies among its sectors. ¹¹ That verifies Cetane's stated focus, not its quality, market leadership, transaction outcomes, or fit.

Ask Cetane and other candidates for comparable assignments, the actual senior team, treatment of licenses and recurring agreements, source of valuation evidence, buyer-identification process, conflicts, registrations or licensed activity, fee and exclusivity terms, responsibilities after an LOI, and references the owner can contact. Verify public claims and have counsel review the engagement. Greenwood affiliation must never determine inclusion or selection.