The short answer: Plumbing businesses sell for a median of about 2.24×, 2.62× SDE (most deals 1.66×, 3.15×), with a 2025 median sale price near $837,500. The critical catch: the company must operate under a licensed master plumber as its qualifying party, and some jurisdictions, notably NYC, which requires 51% master-plumber ownership, can block an out-of-trade buyer. Most buyers finance with an SBA 7(a) loan at ~10% down. Price a target in the valuation calculator.
The plumbing deal, at a glance
Why plumbing is a stable business to buy
A backed-up sewer line or a burst pipe is not a "maybe next month" purchase. That non-discretionary demand is why plumbing revenue holds up in downturns and why 2025 was a banner year: profit margins on plumbing businesses that sold hit a five-year high of about 26.7%, and the median sale price climbed 46% from 2022. (BizBuySell) It's one of the first trades we point new buyers toward, for two reasons:
- Recurring service & repeatable demand. Water heaters fail, re-pipes come due, and commercial buildings need maintenance contracts. High-quality shops derive 40 to 60% of revenue from recurring work, the stickiest, highest-value dollars in the business.
- An installed crew and license base. The workforce shortage that plagues HVAC hits plumbing too. Buying an established shop means buying trained plumbers, apprentices, and, crucially, the licenses that let the company operate.
What plumbing revenue is made of
The more revenue sits in contracted maintenance, the higher the multiple, that's the dollar buyers pay up for.
In plumbing, you're not just buying customers and trucks. You may be buying the one thing you legally cannot operate without: a license attached to a person.
What do plumbing businesses sell for?
The 2.62× anchor sits above the market median of ~2.24×, a reminder that revenue mix moves the number a lot:
| Revenue type / size | Typical multiple | Basis | Notes |
|---|---|---|---|
| New-construction-heavy | 2.0×, 3.0× | SDE | Lumpy, lower-margin, cyclical |
| Residential service | 3.0×, 4.0× | SDE | Steadier, repeat customers |
| Commercial recurring-maintenance | 4.0×, 5.5× | SDE | Contracted, sticky, premium |
| $1M, $2M EBITDA shop | 5.0×, 7.0× | EBITDA | Above the "$1M EBITDA cliff", PE/search-fund buyers |
See the live figure on plumbing multiples. Note the $1M EBITDA cliff: below it you sell to individual SBA buyers at 2 to 4.5× SDE; clear it and private equity pays 5 to 9× EBITDA. A buyer who grows a shop past that threshold earns real multiple expansion at their own exit.
The $1M EBITDA cliff
Grow a shop across the threshold and the same dollar of profit is worth roughly 2× more at your own exit.
Plumbing licensing rules for buyers
This is the one that catches out-of-trade buyers, and it separates plumbing from every other trade in this hub. A plumbing contractor license requires the business to employ a licensed master plumber, the "qualifying party" or responsible individual. If the departing owner is that license-holder and you haven't planned for it, you can lose the legal basis to operate the day you take over. Worse, some jurisdictions tie the license to ownership:
- New York City requires that at least 51% of the controlling stock be owned by a licensed master plumber, a direct obstacle for an out-of-trade buyer.
- Minnesota requires the responsible licensed individual to be an owner, officer, member, or a W-2 employee actively engaged in the plumbing work.
- Most states require general liability of $500,000, $1,000,000 and municipal permit surety bonds.
- Backflow prevention is a separate specialty certification that gates certain commercial and municipal work. Check which of your plumbers hold it.
How to handle the license before you buy
Your options: retain the seller's master plumber through a transition (often 12+ months), hire a qualifying master plumber onto payroll, partner with one on ownership where required, or earn the license yourself. Make license continuity a closing condition in your deal structure. (ServiceTitan; UpCodes; state boards)
What to check before buying a plumbing business
- License-holder dependence, the #1 risk. Who holds the master license? Are they staying, and for how long? This is a deal-killer if unresolved.
- Customer concentration. A top customer under 20% of revenue is clean; 25%, 35% typically warrants a 0.25×, 0.5× discount and a retention earnout; builder or property-management concentration is the biggest flag.
- Recurring revenue share. Commercial shops with 40%+ contracted recurring revenue trade 1 to 1.5× EBITDA higher than those under 15%.
- Service vs. new-construction mix. A quality-of-earnings review will scrutinize this. Recurring service is worth materially more than one-time new-construction.
- Warranty & callback liability. Implied and express workmanship warranties transfer with the business; callbacks erode job margin.
- Crew, apprentices & on-call rotation. Labor is the binding constraint. Verify tenure and retention.
Plan for a 60 to 90 day diligence window. See the full framework in how to buy a business and browse real deals in case studies.
Seasonality and cash flow
Plumbing is less weather-dependent than HVAC. Demand spikes around winter freeze events, frozen and burst pipes, boiler and heating work, and again in early spring, with a quieter summer for urgent repairs. It's a flatter curve than HVAC's twin summer/winter peaks, but unmanaged seasonal cash-flow gaps can still cost a small shop $15,000, $40,000 in missed annual growth. Reserve for the slow stretch and bill maintenance contracts monthly to smooth it. (Fergus; Catalyst for the Trades)
How to finance a plumbing business purchase
| Source | Amount | % of price |
|---|---|---|
| SBA 7(a) bank loan | $720,000 | 90% |
| Your cash injection | $40,000 | 5% |
| Seller note (full standby) | $40,000 | 5% |
| Total | $800,000 | 100% |
Where the $800K comes from
Lenders size the loan to a DSCR of ~1.15×, 1.25×. See the full money math on what it costs to buy a plumbing business and take-home on how much plumbing owners make.
Price a plumbing deal in minutes
Drop in SDE and a multiple for a defensible valuation range.
Frequently asked questions
A median of roughly 2.24×, 2.62× SDE, most deals 1.66×, 3.15×. Commercial recurring shops hit 4×, 5.5×, residential service 3×, 4×, new-construction 2×, 3×. Above $1M EBITDA it shifts to 5×, 9× EBITDA. See plumbing multiples.
Not personally, but the company must employ a licensed master plumber as its qualifying party. Some places go further, NYC requires 51% master-plumber ownership, which can block an out-of-trade buyer unless the license-holder stays or partners with you.
Solo owner-operators take home $50K, $100K; established multi-crew firms $150K, $250K+. On shops that sell, median owner earnings (SDE) run ~$276,000. See plumbing owner earnings.
The 2025 median sale price was ~$837,500. With an SBA 7(a) loan you need ~10% down, and up to half can be a standby seller note, so your own cash on an $800K deal could be near $40,000 plus closing costs. See cost to buy.
