What makes a plumbing company worth more?

What is a plumbing business worth? Start with what it earns, then a multiple. Small, owner-run plumbing companies sold on BizBuySell from 2021 to 2025 went for a median 2.24x seller's discretionary earnings, with the middle half between 1.66x and 3.15x. Where your company lands in that range, or whether it moves up to the adjusted EBITDA prices larger companies get, depends on the 23 drivers below. Most of them you can improve. A few take years, so it pays to know which ones before a buyer tells you.

The effects in the tables are our estimates, in turns of an adjusted EBITDA multiple, built from published buyer criteria, disclosed deals and advisor judgment. If your company is small enough to be priced on SDE, cut each effect roughly in half: one turn of SDE carries about twice the weight of one turn of EBITDA. The time needed is our estimate too. Nothing here is a price for your company.

Illustrative estimate

The drivers, ranked

We group the 23 drivers into five themes, ranked by how often they decide whether a plumbing deal happens and at what price.

1. License, people and how much the business needs you

This theme stops more plumbing deals than any other. A master license is issued to a person and does not transfer in a sale; if you are the only qualifier, the buyer can't operate after closing.

Driver	What buyers check	Effect on the multiple (our estimate)	How to improve	Time needed
Master license and qualifier depth	Whose license you work under, and how many other masters are on payroll	Only you with no plan: down 0.5x to 1.5x, or no deal. One other master: up 0.25x. Two or more: up 0.5x to 0.75x	Hire or develop a second master, or plan to stay as license holder	12 to 24 months
Owner dependence	Who sells, prices, dispatches and holds customer relationships	Down 1.0x if it all runs through you, up 0.5x if it runs without you	Hand off one job at a time: phone, pricing, then sales	12 to 24 months
Management depth	A service manager, dispatcher and office lead who run the day	Up 0.25x to 0.75x for a proven number two	Promote or hire a number two and let them run a month	12 months or more
Technician bench and tenure	Number of licensed plumbers and drain techs, and how long they stay	Up 0.25x to 0.75x for 10 or more techs, most with 3 years or more. Down 0.5x for owner plus 1 to 3 techs	Retention pay, training path, written stay bonuses	1 to 3 years
Labor, licensing and insurance compliance	W-2 versus 1099 plumbers, permits pulled, liability insurance, callbacks	Down 0.25x to 1.0x, or an escrow, when problems surface	Move key plumbers to W-2 with your CPA, keep permits and certificates on file	6 to 12 months

Labor matters because there are about 42,000 plumber openings projected each year, so a retained, licensed crew is hard for a buyer to replace. Chisel says 15 or more licensed plumbers can add up to a full turn. In Texas, a Responsible Master Plumber must also carry at least $300,000 of liability insurance and pull permits, and buyers verify both. For the license rules state by state, read does my plumbing license transfer when I sell. To score how much the company leans on you, take the owner dependence test.

2. What kind of work you do

Driver	What buyers check	Effect on the multiple (our estimate)	How to improve	Time needed
Service and repair vs new construction	Share of revenue from repair, drain and replacement versus builder rough-in	Up 0.25x to 0.75x at 80% or more service. Down 0.5x to 1.5x at 40% or more new construction	Grow service and replacement calls, stop chasing low-margin bids	2 to 3 years
Residential vs commercial mix	Homeowners versus businesses, property managers and institutions	Commercial service under contract: 0 to up 0.5x. Commercial bid work: down 0.25x to 0.75x	Turn project customers into service contract customers	1 to 2 years
Drain and sewer share	Drain cleaning, camera, jetting, sewer repair and trenchless work	Up 0.25x to 0.5x at 25% or more of revenue with owned gear	Own the camera and jetter, train crews, track it as its own line	1 to 2 years
Water heater and replacement share	Tank, tankless and heat pump water heaters, repiping, fixtures	0 to up 0.25x for a strong book. Down 0.25x if 15% or more of revenue and tank-only	Train crews on heat pump and tankless installs	6 to 12 months
Multi-trade fit	HVAC, electrical or water treatment alongside plumbing	0 to up 0.5x for a licensed second trade at 15% or more of revenue	Usually not worth starting just to sell; show the cross-sell you have	Years

Builder work is bid thin, paid slowly and tied to the housing cycle, so the more gross profit comes from service calls, the more buyer interest you get. Ad Astra's illustrative comps price a 60/40 service and new construction owner-operator at 3.5x against 6.0x to 7.5x for service-heavy peers. Water heaters matter now because most electric storage water heaters must use heat pumps from May 6, 2029 under the Department of Energy rule, and buyers ask whether your techs install them.

3. Recurring revenue and customers

Driver	What buyers check	Effect on the multiple (our estimate)	How to improve	Time needed
Membership and maintenance plans	Customers paying every year for inspections, drain care, flushes, priority service	Up 0.25x at 10% to 30% recurring. Up 0.5x to 1.0x at 30% or more with high renewal	Sell a simple plan on every call, track renewals	1 to 3 years
Commercial service contracts	Written yearly agreements: backflow testing, grease traps, property portfolios	Up 0.25x to 0.5x when 30% or more of commercial revenue is under contract	Put repeat commercial work on written annual terms	6 to 18 months
Customer concentration, including home warranty	Share of revenue from your single largest customer	Down 0.25x at 10% to 25%. Down 0.5x to 1.5x above 25%	Grow other customers so no one is over about 10%	1 to 3 years
Builder concentration and terms	How many builders give you work, how fast they pay, retainage	A further 0.5x to 1.0x down when one builder supplies most new construction	Spread builder work, tighten payment terms	1 to 2 years
Lead sources and reputation	Share of calls from repeat, referral and organic search versus paid ads; reviews	Down 0.25x to up 0.25x	Ask for reviews, track lead source on every job	6 to 12 months

Chisel says 30% or more recurring revenue can add up to a full turn. Plumbing plans are less common than HVAC ones, so a working plan stands out. Home warranty work keeps trucks busy but warranty companies pay fixed rates and can cut labor rates at renewal, and lenders discount it.

4. Size, earnings and books

Driver	What buyers check	Effect on the multiple (our estimate)	How to improve	Time needed
Size and earnings base	SDE or adjusted EBITDA, which decides which buyers can look at you	Sets the base band rather than adjusting it	Document add-backs so your true earnings show	6 to 12 months
Margins	Earnings as a share of revenue	Down 0.5x under 10% EBITDA margin, up 0.5x at 20% or more	Price from a flat-rate book, cut unprofitable work	1 to 2 years
Financial records and job costing	Monthly CPA-reviewed statements, accrual books, job costing by work type	Down 0.5x for do-it-yourself or no books, up 0.25x for CPA-reviewed accrual books	Hire a bookkeeper, get a CPA review every month	12 months
Revenue trend and track record	Three-year revenue direction and years in business	Down 0.5x if declining, up 0.5x for steady growth	Show 2 to 3 quarters of steady or rising sales before going to market	6 to 12 months

Size decides your buyers. PE add-on buyers generally want about $1M or more of EBITDA, and individual buyers are limited by the $5M SBA 7(a) loan cap. Books matter more than they used to: SBA lenders now verify seller financials against IRS transcripts. To find what you can add back, use the plumbing add-backs checklist.

5. Operations, equipment and where you are

Driver	What buyers check	Effect on the multiple (our estimate)	How to improve	Time needed
Geography and buyer density	How many active buyers already operate near you	Up 0.25x to 0.5x in buyer-dense metros. Down 0.25x to 0.75x in rural markets	Not much to change; know who is buying nearby	None
Call handling and booking rate	Who answers the phone and what share of calls become jobs	0 to up 0.25x when tracked and staffed. Down 0.25x when you or your spouse answer	A dispatcher or answering service, and track the booking rate	1 to 3 months
Average ticket and pricing method	Average invoice and whether prices come from a flat-rate book	Down 0.25x to up 0.25x	Move to a written flat-rate price book	3 to 6 months
Fleet and equipment	Number, age and ownership of trucks, jetters, cameras, trenchless rigs	0 to down 0.25x, or a dollar deduction for near-term replacement	List every truck and tool with age, and show a replacement plan	1 to 3 months

ServiceTitan's data on more than 3,000 trade businesses put plumbing at the top of the trades for call booking at 43% in June, with top shops booking about 77%, so buyers see a well-run phone as easy growth. No one publishes plumbing multiples by region; Salt Creek says regional variation is real and unmeasured. What we can see is that the Midwest has been the active zone: at least 9 of 34 plumbing deals announced from January 2025 to October 2026 included a Midwest company.

How each buyer reads the same drivers

The same company can look very different to four kinds of buyer. That is why one number never tells the whole story. More on each in who buys plumbing companies.

Buyer	Who they are	What they pay for	What they punish
PE platform or add-on buyer	Sila, Redwood, Southern Home, Leap and similar	Service and replacement revenue, memberships, a bench of masters and techs, dense metro routes, cross-sell into HVAC and electrical	Builder exposure, a single license holder, callbacks, concentration, falling call volume
Commercial and mechanical contractors	Comfort Systems, Limbach, new commercial plumbing platforms	Backlog, commercial service contracts, estimating and project management	Thin bid margins, retainage, a few GCs supplying most work
Holding companies and search funds	Kingsway Skilled Trades, Chisel, family offices	Steady cash flow at about $0.5M to $4M EBITDA; flexible on your transition	Often pay part of the price later through seller notes and earnouts
Individual buyer with an SBA loan	Owner-operators, former managers, career changers	SDE they can repay a loan from	Builder and warranty work, a license only you hold, numbers that don't match tax returns

A PE-backed buyer was on 62.8% of 2026 HVAC, plumbing and electrical deals Salt Creek tracked, and their price is usually part cash, part rollover equity. Be careful with deferred pay: where an earnout paid anything, the median payout was 43 cents on the dollar (SRS Acquiom data via Salt Creek). For individual buyers, since June 2025 the SBA requires a 10% equity injection, and a seller note counts toward it only if it is on full standby for the life of the loan.

Worked example

Worked example: Same plumber, two versions, two prices

These numbers are made up. This is a sample Dayton, Ohio company we use to test our calculator, and the multiples are illustrative.

Version 1. $1.65M revenue, mostly repair, drain and water heater work. SDE is about $330,000 after averaging three flat years. The owner is the only master and would stay on as license holder for 1 to 2 years. The owner or spouse answers the phone, and the books are do-it-yourself.

Our calculator starts at about 2.20x SDE for a company this size, adds for the service-heavy mix, repeat and referral leads and Midwest buyer interest, and subtracts for the books, the phone and the single license. Net: 2.38x. $329,586 x 2.38 = about $784,000, in a range of about $590,000 to $1.09M.

Version 2. Same company a year later, with a bookkeeper producing monthly statements that tie to the tax return (worth 0.30x), an answering service on the phones (0.125x), and a little less owner involvement, a second in command and more members (together 0.025x, because positive adjustments are near our ceiling). Net: 2.38 + 0.30 + 0.125 + 0.025 = 2.83x. $329,586 x 2.83 = about $933,000, in a range of about $740,000 to $1.19M.

The gap: about $150,000, mostly from two fixes that cost far less than that. A second master on payroll would close the license gap too.

Red flags that stop or shrink a deal

Red flag	Why it hurts	What to do
You are the only master and there is no plan	The buyer can't legally work the day you leave	Get a second master on staff, or plan to stay as license holder for a year or two. Start at least 12 months before you sell
Half or more of revenue is new construction	Builder work is bid thin, paid slowly and lenders discount it	Grow the service side for 2 to 3 years before selling
One builder or customer is over half your revenue	That customer can walk after the sale	Expect part of the price to depend on them staying, through an earnout or seller note
More than 25% home warranty work	Fixed low rates that can be cut at renewal	Move even part of it to your own customers
It all runs through you and there is no number two	Buyers see the business as you	Plan a longer handover and expect more of the price paid later
Owner plus 1 to 3 techs, mostly new	Some PE buyers require 10 or more full-time techs	Your best buyers are likely a local competitor or an individual with an SBA loan
Most plumbers are 1099	Possible back payroll taxes, priced or held in escrow	Talk to your CPA about moving key plumbers to W-2 before you sell
Do-it-yourself books or none	Numbers a buyer can't verify get valued at the low end or not at all	A year of CPA-reviewed monthly statements
Revenue down 15% or more over two years	Buyers pay for where the business is heading	Show 2 to 3 quarters of steady or rising sales first
Owner earnings under 10% of revenue	Roto-Rooter franchisees with single-digit margins sold near 1.1x to 1.2x revenue	Work on pricing and call mix before growth
Old trucks, still financed	Buyers price replacement as a cost they must pay soon	Show a replacement plan, or expect a lower offer
Big water heater share, tank-only crew	The 2029 heat pump rule puts that revenue at risk	Train the crew on heat pump and tankless installs
You or your spouse answer every call, day and night	Calls and emergency work depend on your phone	A dispatcher or answering service

What to do in the next 12 to 24 months

Settle the license plan first. It is the slowest fix. Decide whether a licensed employee will qualify the company, whether you will stay on as license holder, or whether you expect the buyer to bring a qualifier. Check your state's rule.
Take the phone and the books off your desk. An answering service or dispatcher and a bookkeeper with monthly statements are the cheapest value boosts in the example above.
Find your number two. Give a service manager or office lead real authority and let them run a week, then a month.
Shift the mix toward service. Sell a simple maintenance plan on every call and stop bidding builder work that barely pays.
Keep your licensed people. A written stay bonus for key plumbers is something buyers can see and count.
Score yourself. Take the owner dependence test, then run the free plumbing estimate to see which drag costs you the most in dollars.

Sources

Questions owners ask

What is the single biggest thing that moves a plumbing company's value?

For most owners it is the master license. If you are the only licensed master and there is no plan to replace you, some buyers will not make an offer at all. After that, the share of service work versus new construction and how much the business needs you matter most.

Can I add value in one year?

Yes, some. Clean monthly books, an answering service and a written price book can all be in place within a year. The license plan, a number two and a membership base usually take longer, so start those first even if they finish later.

Do PE buyers pay more than a local buyer?

Often on the headline, because they price on adjusted EBITDA and value service revenue and memberships. But their price is usually part cash and part rollover equity or earnout. Compare cash at closing, not the headline, and ask your CPA what each structure means after tax.

Is a one-truck plumbing company worth anything?

It can be, but mostly to an individual buyer or a nearby competitor, and usually at the low end of Main Street multiples. Without a crew and a license plan, what a buyer gets is mostly customers and equipment. A second licensed plumber changes that.

Does my plumbing license transfer when I sell?
Can I sell my plumbing license? No, it belongs to you, not the company. What buyers need instead, the TX, FL, MA, NYC and CA rules, and a plan.
Who would buy my plumbing business?
Selling a plumbing business to private equity, a local rival or an SBA buyer: who buys companies your size, what each pays for, and who is active now.
How do I sell my roofing company, step by step?
How to sell a roofing company in nine steps, from deciding what you want to the handover. Buyers, the LOI, due diligence, closing and what to ask.
Is what I would get enough to retire on?
Is selling my business enough to retire on? Start with what you net, turn it into a yearly income range, then add Social Security and savings.

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This is an educational estimate, not an appraisal. RetireFromTrades gives an illustrative range based on what you told us and on general market information. It is not a formal business valuation or appraisal, and it is not an offer to buy your business. We are not a business broker, M&A adviser, CPA, lawyer or financial adviser, and nothing here is legal, tax, accounting or investment advice. Real offers depend on your actual financial records, buyer diligence, deal terms and market conditions, and can be higher or lower than this range. Before you make any decision, talk to a licensed professional. If you ask, we can introduce you to an independent licensed business broker; we do not broker, negotiate or take part in any sale.