Hiring a plumber is one of the higher-stakes decisions a homeowner makes. Bad work is expensive to fix; unlicensed work can void your insurance and complicate your home's resale. This guide walks the verification process the way HomeClip itself runs it, license check, red flags, written quote comparison, and Trust Score sanity-check.
Skip the guide and jump to verified plumbers:
Step 1: Verify their state credentials
In Texas, plumbers are required by law to hold an active license from Texas State Board of Plumbing Examiners. Anyone performing work for hire without one is operating illegally. You can look up a license directly: TSBPE license search ↗.
Red flags, walk away if you see these
⚠ No state license, or refusing to provide a license number
In Texas, plumbing work must be performed by a licensed plumber registered with the TSBPE. Any contractor who can't or won't give you their license number is operating illegally for any non-cosmetic plumbing work. Verify the number directly on the TSBPE website, don't rely on a screenshot or written claim.
⚠ Quote without seeing the work in person
A plumber who quotes a re-pipe, sewer line, or water-heater install over the phone without inspecting your system is either underbidding to get the job (and will up-charge later) or overbidding to deter you. Reputable plumbers come out for a free or low-cost diagnostic before pricing major work.
⚠ Asking for >50% payment up front
Material costs justify some deposit on large jobs (water heater installs, re-pipes). 'Pay us in full before we start' is a textbook scam pattern, especially for emergency work where you're under pressure.
⚠ Discount for cash, no invoice, no receipt
A cash-discount paired with no paper trail means no warranty, no recourse if the work fails, and likely no insurance carrying the risk. The 'discount' is them not paying taxes, you're the one absorbing the risk.
⚠ Refusing to pull permits for work that requires them
Water heater replacements, gas line work, sewer line repairs, and most repipes require permits in Texas. A plumber who suggests skipping the permit to save time or money is exposing you to insurance issues and resale problems later.
⚠ Unmarked or magnetic-sign vehicle for big jobs
Major plumbing work warrants a real business with a real vehicle. Magnetic decals over an unmarked truck for a five-figure repipe is a red flag, that's a person who can disappear, not a company you can sue if things go wrong.
The 6-step verification process
Run every plumber you're considering through these steps before signing anything or paying any deposit.
- 1. Get the license number and verify it on the TSBPE site. Ask for the plumber's Responsible Master Plumber (RMP) number and verify it at tsbpe.texas.gov/license_search.html. You're checking: license is Active, no disciplinary actions, RMP name matches who's actually doing the work.
- 2. Ask for proof of liability insurance and worker's comp. Request a Certificate of Insurance (COI) showing general liability + worker's comp coverage. If a worker is injured on your property and the plumber isn't insured, your homeowner's insurance can be on the hook.
- 3. Get 3 itemized written quotes. Quotes should break out labor, materials, permits, and warranty terms separately. A vague flat number ('$8,000 for the repipe') hides where the money is going. The HomeClip Get 3 Quotes flow sends your job to 3 verified plumbers in your city; they reach out, you compare.
- 4. Check Trust Score + check Reddit independently. Pull the contractor's HomeClip Trust Score (combines license verification + review sentiment from Google and Reddit + HomeClip's own verified reviews). Also search Reddit independently, local subreddits like r/Austin often have unfiltered opinions. A plumber praised on Google but dragged on Reddit is a yellow flag.
- 5. Confirm permits will be pulled by them, not you. Texas permits the plumber's responsibility for licensed work. If they ask you to pull the permit yourself, that means YOU are legally responsible if anything goes wrong. Walk away.
- 6. Get the warranty in writing. Standard for major plumbing work: 1-year labor + manufacturer warranty on parts. Anything less is below market. Anything verbal-only is worthless.
What a fair quote looks like
Pricing varies by region, complexity, and material choice, but these Texas benchmark ranges are a sanity check. Quotes well outside these ranges in either direction warrant a second look.
| Job type | Fair range (Texas) |
|---|---|
| Service call (diagnostic) | $50–$150 |
| Water heater install (gas, 50gal) | $1,800–$3,500 |
| Drain unblock | $150–$450 |
| Copper repipe (2,000 sq ft) | $18,000–$40,000 |
| Sewer line replacement | $5,000–$15,000 |
How HomeClip helps
Every plumber on HomeClip has a 0–100 Trust Score combining TSBPE license verification + reliability + quality + Google and Reddit sentiment, responsiveness, and pricing fairness. Paying us never changes a Trust Score, the ranking you see is the actual ranking.
Want quotes without doing the vetting work yourself? Get 3 free quotes from verified plumbers , we send your job to the 3 highest-scored plumbers in your city; they reach out to you within the hour. Your leads go only to you, never shared.
Frequently asked questions
How do I verify a plumber's license in Texas?
Go to tsbpe.texas.gov/license_search.html and enter their Responsible Master Plumber (RMP) number. You'll see license status, expiration date, and any disciplinary actions. The license must be Active (not Expired or Suspended) and the RMP's name should match who is doing the work on your project.
What is a fair price for a re-pipe in Austin?
Copper repipe of a typical 2,000 sq ft Austin home: $18,000-$40,000 depending on access, slab vs. crawl space, and fixture count. PEX repipe is typically 40-60% cheaper. Any quote outside that range, especially significantly under, deserves extra scrutiny.
Should a plumber charge for a diagnostic visit?
For emergencies (burst pipe, no hot water), most reputable plumbers waive the trip charge if you proceed with repair. For larger planned work (repipe, sewer), a diagnostic fee of $50-150 is standard and is usually credited toward the job if you hire them.
Can I do plumbing work myself in Texas without a license?
A homeowner can do plumbing work on their own residence (not rental or commercial property). The work still must meet code, and most jurisdictions still require permits for non-cosmetic work. Resale buyers and insurance adjusters can dispute unpermitted DIY work.
Are lead-generation marketplaces a reliable way to find a plumber?
On a pay-to-rank directory or shared-lead marketplace, placement is typically driven by ad spend rather than by license verification or reputation, and the same plumbing job is often sold to several contractors at once who then race to call you. HomeClip ranks plumbers by an un-buyable Trust Score that combines TSBPE license verification with review sentiment from Google and Reddit plus HomeClip's own verified reviews.