Last reviewed: .
When a Texas plumbing owner asks, “How do I sell my plumbing business?” they usually point to their truck count, their Google reviews, and last year’s tax return. Suppose the shop runs $3.8 million in revenue across Houston, DFW, Austin, or San Antonio and clears $750,000 in adjusted cash flow. The owner expects a clean 4.5x to 5.5x multiple and a $3.75 million check at closing.
Then the buyer’s diligence team opens your TSBPE records and your dispatch software (ServiceTitan, Housecall Pro, or FieldEdge) and checks three things that determine whether you get a premium all-cash exit or a discounted earnout:
- Is the selling founder the sole Responsible Master Plumber (RMP) registered with the Texas State Board of Plumbing Examiners (TSBPE)?
- How much of your gross profit comes from recurring residential service agreements, drain/sewer hydro-jetting, and water-heater replacements versus low-margin new-construction rough-in?
- If you do commercial or municipal work, is your Work-in-Progress (
WIP) schedule reconciled monthly, or have upfront mobilization billings already been spent?
Why Texas Occupations Code §1301.351 and 22 TAC §367.3 give buyers massive leverage
Under Texas Occupations Code Chapter 1301 (§1301.351) and 22 TAC §367.3, a Texas plumbing company does not hold a standalone corporate license independent of a person. Every plumbing company must operate under the certificate of insurance and active supervision of one designated Responsible Master Plumber (RMP) registered with TSBPE.
When the founder is the only Master Plumber on payroll and wants to walk away after closing, two statutory clocks collide:
- SBA 7(a) 12-month transition cap: Under SBA SOP 50 10 8, a selling owner cannot remain an officer, director, or key employee beyond a 12-month transition period. An SBA lender will not fund an acquisition where the business loses its legal right to pull municipal plumbing permits on Day 366.
- Private equity & strategic holdbacks: Regional MEP roll-ups and residential home-services platforms know that if your RMP designation leaves with you, every truck is parked until a replacement RMP is registered with TSBPE. To protect themselves, buyers hold back 35%–50% of the purchase price in a multi-year earnout or subordinated seller note tied to license continuity and technician retention.
How RMP continuity and service mix separate a 2.8x SDE shop from a 5.5x EBITDA platform
Look at how buyers and SBA underwriters price two Texas plumbing companies with the exact same $750,000 in trailing 12-month earnings:
| Valuation & Diligence Driver | Shop A: Owner-RMP New-Build / Builder Shop | Shop B: Non-Owner-RMP Service & Drain Platform |
|---|---|---|
| TSBPE Responsible Master Plumber (Tex. Occ. Code §1301.351) | Founder is the sole RMP; all field techs are Journeymen, Tradesman-Limited, or Apprentices. | W-2 Operations Manager or Senior Field Supervisor holds a Master Plumber license, completed RMP requirements, and is under a stay-bonus agreement. |
| Revenue & Gross Margin Mix | 75% tract/custom builder rough-in and top-out; top 3 builders represent 52% of revenue. | 70%+ residential service, slab-leak/re-pipe, hydro-jetting, and recurring maintenance memberships tracked in ServiceTitan/Housecall Pro. |
| Dispatch, Pricing & Call-Center Handoff | Owner prices bids off blueprints and fields builder superintendent calls on his personal cell. | Flat-rate pricebook, dedicated CSR/dispatch desk, and automated customer review/membership renewal cadence. |
| Valuation Multiple Applied | 2.5x–3.4x SDE (~$1.9M–$2.55M headline value) | 3.8x–6.2x Adjusted EBITDA (~$2.85M–$4.65M enterprise value) |
| Typical Cash Wired at Closing | 50%–65% cash at close; balance tied to builder retention and RMP transition milestones. | 80%–90% cash at close with a clean 90-to-180-day handoff. |
The 90-day sequence to eliminate the RMP discount before going to market
Before you sign a broker listing agreement (and hand over an 8%–12% commission) or grant a private equity scout 90 days of exclusivity, execute these four steps:
- Sponsor a W-2 Journeyman for the Master Plumber & RMP track: Audit your roster for senior Journeyman Plumbers who meet the TSBPE four-year (or 8,000-hour with approved training) eligibility requirement to sit for the Master Plumber exam. Pay for their exam prep and TSBPE registration, and sign a written qualifier retention bonus tied to staying 24 months post-close.
- Segment recurring service and drain margin in QuickBooks: Separate residential service/repair, membership renewals, water-heater/water-treatment replacements, and commercial/new-build work into distinct QuickBooks classes so a buyer’s Quality of Earnings team can verify your 60%+ service gross margin without guessing.
- Move flat-rate pricing and dispatch off the owner’s phone: Install a documented flat-rate pricebook and train a lead dispatcher/service manager to handle warranty callbacks, technician dispatch, and daily gross-margin-per-truck tracking.
- Reconcile commercial WIP and customer deposits: If you run commercial plumbing or multi-family rough-in jobs, build a monthly job-by-job WIP over/under-billing schedule so upfront mobilization draws do not become a surprise dollar-for-dollar deduction at the closing table.
Check your plumbing shop against a buyer’s scorecard first
SweetSpot Business Advisors is an operator-led Texas advisory firm. We never act as a broker and never charge a commission:
- Read our complete transaction guide on How do I sell my plumbing business in Texas? and visit our Texas Plumbing Business Advisory Hub.
- Flip through the 24-Page Plumbing Field Guide Sample or take the free 12-minute Sale Readiness Self-Assessment (
$0). - Order a custom 24-page $250 Sale Readiness Field Guide, commission a remote $2,500 Business System Inspection of your records, or book a 30-Minute Working Call.