how-to
How to Verify a Plumber's License and Insurance in 2026
Table of Contents
- Step 1: Use Your State's Plumbing Contractor License Lookup
- Step 2: How to Request a Certificate of Insurance From a Plumber
- Step 3: Questions to Ask a Plumber Before Hiring
- Step 4: Why License and Insurance Checks Matter
- Frequently Asked Questions
Last Updated: September 19, 2026
Step 1: Use Your State's Plumbing Contractor License Lookup
Learning how to verify plumber license and insurance starts with one free public tool: your state's plumbing contractor license lookup, which lets you verify plumber license details in minutes. QuickHotWater.com matches homeowners with local, licensed and insured plumbers.
There is no single national license, plumbing is licensed at the state or local level.
The basic steps work the same almost everywhere:
- Find your state's licensing board and search "[your state] plumbing contractor license lookup."
- Enter the license number or business name.
- Check the status, you want "active," not "expired" or "suspended."
- Read the complaint history and any disciplinary action.
- Confirm the license classification covers a full replacement.
Some states run their own board; others leave licensing to counties and cities, so you may need a local office too.
Step 2: How to Request a Certificate of Insurance From a Plumber
Knowing how to request a certificate of insurance from a plumber is simple: ask the company to email or mail you one before work begins.
It should show general liability insurance (covers damage to your home), workers' compensation coverage (protects you if a worker gets hurt on your property), and the policy dates and insurer's contact information.
Don't stop at the paper. Call the insurance company and confirm the policy is active. Certificates can be faked, and policies can lapse.
Bonding matters too: a license proves the plumber met state requirements, insurance covers injuries and damage, and a surety bond lets you recover money if the contractor breaks the contract or fails to pay for permits and materials.
If a plumber refuses to hand over proof of insurance, treat that as a red flag.
Step 3: Questions to Ask a Plumber Before Hiring
The best questions to ask a plumber before hiring confirm credentials, clarify who does the work, and pin down the permit:
- What is your license number, and what does it cover?
- Can you send your certificate of insurance and bond information?
- Will you pull the permit, or is that on me?
- Who will actually do the install, your crew or a subcontractor?
- Is the quote a firm price, or can it change once you see the setup?
Plumbers confirm the final price on-site after bidding, because nobody can see your setup through a phone screen.
Step 4: Why License and Insurance Checks Matter
Skipping the check is how homeowners end up paying twice. Unlicensed work can fail inspection, void your homeowner's insurance claim, and leave you covering repairs yourself.
A few habits keep you safe: never pay in full up front, get license and insurance details in writing, keep copies of every document, and confirm the license is still active the day work starts.
For water heater replacement, QuickHotWater.com connects you with local, licensed, and insured plumbers who bid competitively. You can request an instant water heater replacement quote in about 30 seconds, no sales visits, and the permit is included. Plumbers confirm the final price on-site after bidding, so the estimate is a starting point, not a locked-in number. If you're a licensed plumber looking for work, you can also apply to join our plumber network.
Frequently Asked Questions
How do I know if a plumber's license is currently active?
Check your state's licensing board website and search by license number or business name. The listing will show status: active, expired, suspended, or revoked. Also look for the license classification to confirm it covers the type of work you need, such as water heater replacement. If the status is anything other than active, do not hire that plumber. You can also call the board directly to confirm.
Can I ask a plumber for proof of insurance?
Yes. Ask for a certificate of insurance showing general liability and workers' compensation coverage. The certificate should list the insurance company, policy number, coverage amounts, and expiration date. Call the insurance company to verify the policy is current. If the plumber cannot provide this, that is a red flag. Reputable plumbers expect this request and will provide it without hesitation.
What should I look for when checking a plumbing contractor's license status?
Verify the license is active, the classification matches the work (e.g., residential plumbing), and the business name matches who you are hiring. Check for any disciplinary actions or complaints. Confirm the license number is valid through your state's online verification tool. Also ask for the license number before work begins and compare it to the state database. This protects you from hiring unlicensed individuals.
Hiring a plumber shouldn't feel like a gamble. QuickHotWater.com matches you with local, licensed and insured plumbers who bid competitively, so you get a fair price without the guesswork. Get your instant estimate, review real bids, and move forward with confidence.