How HVAC businesses are valued
Short answer
An HVAC company is usually valued on normalized earnings: reported profit adjusted to a market cost for every role the owner fills and a realistic reserve for replacing vans and equipment. That figure is then weighed for quality: the share of revenue from service, replacement and maintenance agreements versus new construction, technician depth, who holds the licence, customer concentration and seasonality. Companies with a large renewing agreement base and a team that runs without the owner are worth more for the same earnings.
Two HVAC companies with the same profit can be worth very different amounts. One has 1,500 maintenance agreement customers, eight technicians and an owner who mostly manages. The other is the owner, three helpers and a builder who sends most of the work. A valuation has to explain that difference with evidence, and a lender financing the purchase has to be comfortable with it. This page covers how HVAC companies are valued, the adjustments that matter, and how the valuation feeds an SBA acquisition loan under SOP 50 10 8.1 as of October 2026. For the buyer's side of finding one, see our sister site's guide to HVAC businesses for sale.
The approaches valuers use
A business valuation for a lender considers the income, market and asset approaches, as general valuation guidance such as the IRS's own business valuation guidelines describes, and reconciles them. For an established HVAC company, the income approach usually carries the most weight: normalized earnings capitalized or discounted at a rate that reflects the company's risk. Market evidence from sales of similar companies is used as a cross-check where reliable data exists. The asset approach, essentially the value of the vans, equipment and inventory, acts as a floor and becomes the main approach only when earnings are thin. See income-based valuation.
Value drivers
| Driver | Stronger value | Weaker value |
|---|---|---|
| Revenue mix | Service and replacement heavy | New construction heavy |
| Recurring base | Large, renewing maintenance agreements | Few or lapsing agreements |
| People | Deep technician bench, field supervisor, dispatcher | Owner is lead tech and salesperson |
| Licensing | Licensed managers in place who are staying | Only the seller licensed |
| Customers | Diverse residential and commercial | One builder or property manager dominates |
| Fleet | Maintained, staggered ages | Aging, deferred replacements |
| Systems | Job, dispatch and agreement data in software | Records in the owner's head |
Normalizing the earnings
Three adjustments do most of the work in trades businesses:
- The owner's roles. Owners in HVAC often work as lead technician, estimator, salesperson and manager. Each role the buyer won't fill personally needs a market wage subtracted. Owner pay above that market cost is added back.
- Fleet and equipment replacement. Vans and tools wear out on a cycle. If the seller has stopped replacing them, the valuation and the lender will deduct a realistic annual reserve.
- Non-recurring items. A one-off commercial project, an insurance recovery or a one-time grant gets removed; so do personal expenses run through the company, with evidence.
Every adjustment needs support. On deals of $3 million or more, SBA requires a Quality of Earnings report that identifies all add-backs and adjustments; see quality of earnings adjustments.
Worked example: the owner-replacement adjustment
Illustration, not a real deal
Say the owner of a combined HVAC and plumbing company draws $180,000 and also works as the lead plumber and estimator. EBITDA after the owner's draw is $260,000. You'll manage the business and hire a master plumber at $105,000 and an estimator at $70,000, and you'll pay yourself $120,000.
| Line | Amount |
|---|---|
| EBITDA after seller's draw | $260,000 |
| + Seller's draw | +$180,000 |
| − New master plumber and estimator | −$175,000 |
| − Your salary | −$120,000 |
| Adjusted EBITDA | $145,000 |
Adjusted EBITDA is well below the $260,000 headline, because the seller was doing three jobs. That is the figure a valuation capitalizes and the lender sizes the loan on. At SBA's 1.25x minimum, $145,000 supports annual debt service of $116,000.
Maintenance agreements and seasonality
Maintenance agreements are the closest thing an HVAC company has to subscription revenue. Valuers look at the number of agreements, renewal rate, price, how many visits each includes, and how often agreement customers buy replacements. A big agreement base also smooths the seasonal swing between peak heating and cooling months and the shoulder seasons. Ask for 36 months of monthly revenue: the lender will use it to judge working capital needs, and the valuer to judge how predictable the earnings are.
Builders and property managers
Commercial customers can be the best and the riskiest part of an HVAC book. A property manager with a portfolio of buildings or a builder with a steady pipeline can supply a large share of revenue, which is fine until the relationship ends, often when the person who held it leaves. Valuers look at revenue by customer for three years, contract terms, and whether the relationship sits with the seller or with staff who are staying. On SBA deals of $3 million or more, the Quality of Earnings report must assess customer concentration and contract continuity.
Working capital, parts and warranties
HVAC companies carry parts and equipment inventory, often buy systems before installation and wait for customer payment, and may have manufacturer warranty claims and callbacks in progress. A buyer who doesn't take the seller's receivables starts with none while still paying technicians and suppliers. Lenders look at the cash cycle month by month to decide how much working capital belongs in the project. Warranty and callback history also tells the valuer something about installation quality, which affects future costs.
Licensing and continuity
Many states and localities require a licensed contractor or master tradesperson to be tied to the business. If the seller is the only licence holder, the buyer needs a plan to have a qualified licence holder in place at closing, whether that's the buyer, an existing employee who is staying, or a new hire. Valuers treat licence continuity as a condition of the business continuing at all, and lenders won't close without it.
Financing an HVAC or plumbing purchase with SBA
HVAC and plumbing service companies are common SBA 7(a) acquisitions. The usual rules apply:
- At least 10% equity on the total project for an initial acquisition.
- Above a $350,000 Business Purchase Price, an independent valuation by a Qualified Source, ordered by and prepared for the lender; it must support the price.
- Historical debt service coverage of at least 1.25x, on adjusted earnings like the example above.
- The seller exits and can consult for up to 24 months.
- Vans and equipment as collateral at SBA's used-equipment haircut of 50% of net book value, or 80% with an orderly liquidation appraisal.
Already own an HVAC or plumbing company? Buying 100% of another company in the same four-digit NAICS industry group, after operating at least two full fiscal years under current ownership, may qualify as a Business Expansion, with a 1.15x coverage minimum instead of 1.25x. See SBA change-of-ownership transaction types.
What to collect before the valuation
| Item | Why |
|---|---|
| Revenue by service, replacement, new construction | Earnings quality and cyclicality |
| Maintenance agreement count, price and renewals | Recurring base |
| Technicians, tenure, pay; install crews | Capacity and retention risk |
| Licences and who holds them | Continuity |
| Fleet and equipment list with ages | Collateral and replacement reserve |
| Monthly revenue for 36 months | Seasonality and working capital |
| Top 10 customers and builder relationships | Concentration |
For how goodwill fits into an HVAC price, see financing goodwill; for the lender's full checklist, SBA loan requirements to buy a business. Rules checked against SOP 50 10 8.1 with technical updates (effective October 1, 2026).
Common questions
Are maintenance agreements valued separately?
Usually they're reflected in the quality and stability of earnings rather than priced one by one. A strong, renewing agreement base lowers risk in the valuation; for tax allocation, the agreements may be valued as a customer-based intangible.
How does new construction work affect value?
It adds revenue but tends to be more cyclical, often lower margin and concentrated with a few builders, so valuers give it less weight than service and replacement work.
What documents does a valuer need?
Three years of tax returns and financial statements, revenue by segment, maintenance agreement counts and renewals, a technician roster, a fleet list and the top customers by revenue.
What if the seller holds the mechanical licence?
You'll need a properly licensed person in place at closing, yourself or a key employee, depending on state and local rules. Lenders and valuers both treat a licence that leaves with the seller as a major risk.
Can I finance an HVAC purchase with an SBA loan?
Yes. HVAC and plumbing companies are common SBA 7(a) acquisitions under the normal rules: at least 10% equity, a valuation that supports the price and 1.25x historical coverage for an initial acquisition.
Related guides
Sources
This guide explains rules and practice in plain English. It isn't legal, tax or credit advice, and SBA and IRS rules change. Check the current SOP, regulations and your lender's requirements before you rely on anything here. Examples with made-up businesses are illustrations, not real deals.