How much does it cost to buy an existing HVAC company?

Most small-to-midsize HVAC businesses sell for roughly 2 to 4 times annual earnings (SDE or EBITDA), so a company earning $300,000 a year often lists between $600,000 and $1.2 million. The multiple rises with recurring maintenance-contract revenue, a trained team that stays after the sale, and clean financials.

Can I get an SBA loan to buy an HVAC business?

Yes. The SBA 7(a) program is the most common way to finance an HVAC acquisition, typically funding up to $5 million with a 10-year term and a down payment around 10%. Lenders favor HVAC because of its recurring service revenue and tangible equipment, but they'll want to see the target's tax returns and a clear transition plan.

What's the most important thing to check before buying an HVAC company?

Verify that the revenue and customer relationships survive the owner's exit. Check how much business depends on the seller personally, the size and renewal rate of the maintenance-contract base, the condition and age of the fleet and equipment, and whether key technicians plan to stay. Recurring, owner-independent revenue is what you're really buying.

Should I use seller financing when buying an HVAC business?

Often yes. A seller note covering 10–25% of the price lowers your cash down, and it keeps the seller financially invested in a smooth handoff. SBA lenders frequently allow a seller note to count toward the equity injection, which can make an otherwise tight deal work.

Buying an Existing HVAC Company: Due Diligence & Financing

How to buy an existing HVAC company in 2026 — what to check in due diligence, how to value the business, and how to finance the acquisition with SBA and seller financing.

Buying an existing HVAC company means acquiring its customers, technicians, equipment, and recurring service revenue rather than building from zero. Most small-to-midsize HVAC businesses sell for about 2 to 4 times annual earnings, and the acquisition is usually financed with an SBA 7(a) loan — often paired with a seller note — at roughly 10% down over a 10-year term. The deal lives or dies on due diligence: whether the revenue survives the current owner's exit.

Buying an established HVAC company is one of the fastest ways to own a profitable trades business. The customers, the trucks, the trained crew, and the maintenance contracts already exist — you're stepping into cash flow on day one instead of chasing your first job. The risk is that you pay for revenue that quietly walks out the door with the seller. Good due diligence and the right financing structure are what protect you.

The short version

Pay 2–4× earnings, expect to finance most of it with an SBA 7(a) loan (~10% down, 10-year term) plus a seller note, and spend your diligence energy on one question: does the revenue depend on the owner, or on systems and contracts that stay after the sale?

What you're actually buying

A turnkey HVAC business is worth more than its trucks and tools. The value sits in things that are hard to build:

A recurring maintenance-contract base — predictable revenue that renews each year
An established customer list with repeat and referral history
A trained, licensed technician team that knows the local market
Equipment and a service fleet already in operation
Permits, licensing, and supplier relationships already in place

The catch: each of these only has value if it survives the handoff. That's what diligence verifies.

Due diligence: what to check before you sign

Verify the financials

Get three years of tax returns and P&Ls. Confirm reported earnings match what the bank deposits show. "Add-backs" should be reasonable, not a wish list.

Measure owner dependence

How much revenue comes from the seller's personal relationships or hands-on work? The more the business runs without them, the safer — and the more it's worth.

Audit the contract base

Count active maintenance agreements and their renewal rate. Recurring contract revenue is the most durable, financeable part of an HVAC company.

Inspect the fleet and equipment

Age, condition, and upcoming replacement costs. A cheap purchase price means little if half the vans need replacing next year.

Lock in the team

Talk to key technicians (within the bounds of the deal) and plan retention. If the crew leaves, you bought a customer list you can't service.

Owner-dependent revenue is the #1 acquisition trap

If most of the company's business comes because customers trust the current owner personally, that revenue can evaporate the day they leave. Discount the price for owner dependence, and structure a transition period (and often a seller note) so the handoff is gradual, not a cliff.

How HVAC acquisitions get valued

Most deals price off a multiple of earnings — Seller's Discretionary Earnings (SDE) for smaller shops, EBITDA for larger ones:

Typical HVAC acquisition valuation factors (general ranges — varies by market)
Factor	Lower multiple (~2x)	Higher multiple (~4x)
Revenue mix	Mostly one-time installs	Heavy recurring maintenance contracts
Owner dependence	Owner does the selling	Runs on managers & systems
Team	Few or at-will techs	Trained crew committed to stay
Financials	Messy / cash-based	Clean, documented, taxable

Financing the purchase

Almost no one buys an HVAC company with cash. The common structure stacks a few sources:

SBA 7(a) loan — the workhorse for acquisitions up to $5M: ~10% down, 10-year term, and lenders like HVAC for its recurring revenue and hard assets. See our business acquisition loan guide for the mechanics.
Seller financing — a seller note for 10–25% of the price lowers your cash down and keeps the seller invested in your success. SBA lenders often let it count toward your equity injection.
Your equity injection — typically ~10% of the deal, sometimes partly satisfied by the seller note.

A typical $900,000 acquisition might look like an SBA 7(a) loan for ~$720K, a seller note for ~$90K, and ~$90K of your own cash.

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The bottom line

Buying an existing HVAC company buys you instant cash flow — if the revenue is real and durable. Spend your diligence on owner dependence and the contract base, value the business on a sensible multiple of verified earnings, and finance it with an SBA loan plus a seller note so the structure itself keeps the seller invested in a clean handoff. Get those three right and you own a profitable business from day one instead of grinding for your first customer.