How to Choose a Licensed Plumber in Addison, TX: 10 Questions to Ask Before You Hire

A plumber comes into your home, works on gas lines, cuts into walls, or opens your foundation. Picking the wrong one costs real money and sometimes real safety. In Addison and across Dallas County, state law requires every plumber to be licensed through the Texas State Board of Plumbing Examiners — but less than half of the "plumbers" who show up in Google ads hold the required Responsible Master Plumber (RMP) credential.

Here are the 10 questions that separate real licensed pros from the kind of operator you only hire once, plus the four credentials you can verify in under five minutes before signing anything.

1. "What is your Texas State Board of Plumbing Examiners license number?"

Every Texas plumber must hold one of four credentials: Tradesman-Limited, Journeyman, Master, or Inspector. All plumbing work must be performed or supervised by a licensed Responsible Master Plumber (RMP) — the business must have an RMP named on the state record. Ask for the exact RMP license number, write it down, and verify at the TSBPE license search site.

If the plumber refuses to share the number, that answers the question.

2. "Can I see your certificate of insurance?"

Minimum you want: $1M general liability + workers compensation + commercial auto. Property-manager-ready contractors carry $2M liability and send the COI to your management company before the first visit. If the plumber hesitates or offers to "email it later" — pass.

3. "Will the Town of Addison plumbing permit be pulled, and who handles it?"

Water heaters, slab leak repairs, sanitary sewer relays, gas line work, and water distribution piping in Addison typically require a plumbing permit and inspection. A legitimate contractor:

• Confirms whether a permit is required for your scope
• Pulls it (not asks you to)
• Coordinates the inspection
• Hands you the passing paperwork for your resale file

A plumber who waves off the permit requirement is cutting corners you'll pay for later.

4. "Is the quote flat-rate in writing before you start?"

Industry-standard legitimate quotes contain:

• Problem observed + diagnostic method used
• Recommended repair + at least one reasonable alternative
• Line-item labor, materials, access, excavation, restoration costs
• Exclusions ("if we open the wall and find X, that would be $Y extra")
• Post-work testing + warranty + payment terms

An hourly estimate for anything beyond a 30-minute fixture call is a red flag. See our full plumbing cost guide for Addison.

5. "What is your warranty — on labor AND manufacturer parts?"

Industry standard: 1 year labor + full manufacturer coverage on installed parts (PEX = 25 years, water heaters = 6-12 years, tankless = 10-20 years with annual descale). Get this in writing. Verbal warranty = no warranty.

6. "Who actually does the work — you or a subcontractor?"

For gas lines, slab leaks, sewer line replacement, and repipes, you want the responsible master plumber or a direct employee on site — not a subcontractor the plumber met last Tuesday. Belt Line Plumbing never uses subcontractors on licensed work.

7. "What is your dispatch and emergency response coverage?"

If the website says "24/7" but a call center picks up and asks you to "please hold for the next available dispatcher," that's not 24/7 plumbing — that's a lead-aggregation service that resells your call. A legitimate local emergency plumber picks up live and walks you through the main shutoff before dispatching.

8. "Have you worked in my part of Addison before?"

Belt Line Rd Restaurant Row, Addison Circle condos, Vitruvian Park apartments, and the 1970s Belt Line townhome belt each have specific plumbing patterns a local plumber already knows. If the contractor doesn't know your neighborhood or asks for your HOA name twice, they're not local to you.

9. "If financing is offered, what are the written terms?"

Legitimate plumbing financing comes through third-party lenders (Synchrony, Wells Fargo, GreenSky) with disclosed APR, payment schedule, and cancellation policy. "Buy now, pay later" with no disclosed APR is a trap — ask for the full disclosure before signing. For context on scope, see our repiping cost in Dallas County 2025 guide.

10. "Can I see dated local case studies or recent reviews from my area?"

Not generic 5-star screenshots. Specific examples:

• A camera-video of a sewer repair done on a street near yours
• Before/after photos of a slab leak repair in a similar home
• Recent Google reviews with named Addison neighborhoods (Addison Circle, Vitruvian, Belt Line, Midway)

A plumber who serves your actual market will have this. One who claims "we serve all of DFW" and nothing specific — pass.

The four credentials you can verify in 5 minutes

1. TSBPE license — https://www.tdlr.texas.gov/LicenseSearch/ — search by RMP number or company name
2. Texas Secretary of State business registration — confirms a real business entity, not a side gig
3. Google Business Profile — confirms a verified physical address, review history, Q&A engagement
4. BBB / local chamber — Addison Chamber of Commerce membership is a soft but useful signal

What Belt Line Plumbing puts on paper before every Addison job

• Texas RMP license number — verifiable at TSBPE
• $2M general liability + workers comp + commercial auto
• Flat written quote with scope + alternatives + exclusions
• 1-year labor warranty + full manufacturer parts coverage
• Town of Addison permits pulled when scope requires one
• Response-time commitment: 30 minutes inside Addison / Tollway corridor
• 24/7 line answered by a licensed plumber, not a call center

Call (831) 290-4327 for a flat written quote on any plumbing scope in Addison, TX — or send a message through our contact form and a licensed plumber will call you back within the hour during business hours.