How to Hire a Plumber: 10 Questions to Ask Before Signing
A leaking pipe, broken water heater, or backed-up drain can derail your entire day — and hiring the wrong plumber can turn a minor problem into an expensive disaster. Whether you’re dealing with an emergency or planning a bathroom renovation, knowing how to hire a plumber the right way saves you money, stress, and regret.
This guide walks you through exactly what to look for, what to ask, and what red flags to watch before you sign any contract.
Why Choosing the Right Plumber Matters
Plumbing mistakes are rarely minor. A poorly installed pipe can lead to mold, structural damage, and thousands of dollars in repairs. Unlicensed work may not pass inspection — leaving you liable when you sell your home.
The good news: vetting a plumber thoroughly takes less than 30 minutes and protects you completely.
Step 1: Verify Licensing and Insurance Before Anything Else
Licensing
Plumbers must be licensed in most U.S. states. Licensing requirements vary, but a licensed plumber has passed exams, completed apprenticeship hours, and is legally authorized to perform plumbing work.
How to verify: Ask for the plumber’s license number, then check your state contractor licensing board website. Most boards offer free online lookup tools.
Never hire an unlicensed plumber. If something goes wrong, your homeowner’s insurance may refuse to cover the damage.
Insurance
Any plumber you hire should carry two types of insurance:
- General liability insurance — covers damage to your property if something goes wrong
- Workers’ compensation insurance — covers injuries to the plumber or crew while working on your property
Ask for a certificate of insurance and verify it’s current. A legitimate plumber will provide this without hesitation.
Step 2: Check References and Reviews
Online reviews tell part of the story. For bigger jobs, ask for 2–3 references from recent customers and actually call them.
Questions to ask references:
- Did the plumber show up on time?
- Was the final cost close to the estimate?
- Did they clean up after the job?
- Would you hire them again?
Look for patterns across reviews — one bad review can be a fluke, but consistent complaints about billing, no-shows, or shoddy work are warning signs.
Step 3: Get Multiple Quotes (At Least 3)
For any job over a few hundred dollars, get at least three written estimates. This gives you:
- A realistic sense of fair market pricing
- Leverage to negotiate
- Protection against wildly inflated quotes
Important: The lowest bid isn’t always the best. A quote far below market rate may mean the plumber plans to cut corners, use inferior materials, or is not insured.
Ask each plumber to break down their estimate: labor, materials, permits, and any potential additional costs.
Step 4: Understand Flat-Rate vs. Hourly Pricing
Plumbers typically charge one of two ways:
Flat-Rate (Fixed Price)
You pay a set price for the job, regardless of how long it takes. This is predictable and protects you if the job runs long.
Hourly Rate
You pay for time plus materials. This can work out cheaper for simple jobs, but can spiral on complex repairs.
Ask upfront: “Is this estimate flat-rate or hourly? What happens if it takes longer than expected?“
10 Questions to Ask a Plumber Before Signing
Use this checklist before hiring any plumber:
- Are you licensed in this state, and can I verify your license number?
- Do you carry general liability and workers’ comp insurance?
- How long have you been in business?
- Have you done this type of job before? Can you share references?
- Is this estimate flat-rate or hourly?
- What’s included in this estimate — labor, materials, cleanup?
- Do I need a permit, and will you pull it?
- What’s your timeline for completing this job?
- What’s your warranty on labor and parts?
- What payment methods do you accept, and when is payment due?
Never pay 100% upfront. A standard payment schedule is 10–30% deposit, with the balance due on completion.
Permits: Who Pulls Them and Why It Matters
Many plumbing jobs require permits — especially new installations, water heater replacements, and major repairs. Permits ensure the work gets inspected and meets code.
The plumber should pull the permit, not you. When a contractor pulls a permit, they’re legally responsible for the work passing inspection. If they ask you to pull your own permit, that’s a red flag — it shifts liability to you.
Red Flags to Watch For When Hiring a Plumber
Avoid any plumber who:
- Can’t provide a license number or certificate of insurance
- Demands full payment upfront before work begins
- Gives a quote over the phone without seeing the job (for anything complex)
- Offers a dramatically lower price than all other bids without explanation
- Pressures you to sign immediately or claims a “today only” discount
- Doesn’t provide a written contract or estimate
- Has no online presence, reviews, or verifiable address
- Asks you to pull the permit yourself
- Doesn’t guarantee their work in writing
Trust your gut. If a plumber makes you feel rushed or uncertain, keep looking.
Understanding Your Plumbing Contract
Before work begins, you should have a signed written agreement that includes:
- Scope of work — exactly what will be done
- Materials — brand, grade, and specifications
- Timeline — start and estimated completion date
- Total cost — broken out by labor and materials
- Payment schedule — deposit amount, payment milestones, final payment
- Warranty terms — how long labor and parts are covered
- Change order process — how additional costs get approved
Never rely on verbal agreements. If the plumber says “don’t worry, we’ll work it out” when you ask about a contract — walk away.
How Much Does a Plumber Cost?
Plumbing costs vary by region, job complexity, and contractor, but here are general benchmarks:
| Job | Typical Cost Range |
|---|---|
| Drain cleaning | $100–$300 |
| Faucet repair/replacement | $150–$350 |
| Toilet repair | $100–$250 |
| Water heater replacement | $800–$1,800 |
| Pipe repair | $150–$500+ |
| Full bathroom rough-in | $2,500–$5,000+ |
These are averages — always get a quote specific to your job and location.
Emergency Plumbing: What to Do When You Can’t Wait
For burst pipes, major leaks, or sewage backups, you may need to call immediately without time for multiple quotes.
In an emergency:
- Shut off your main water valve first
- Call a licensed emergency plumber (verify license later if needed)
- Document damage with photos before work begins
- Ask for a written scope and price estimate before they start — even in emergencies, reputable plumbers provide one
- File a claim with your homeowner’s insurance if applicable
Why ProCraft Makes Hiring a Plumber Easier
Finding a vetted, licensed, insured plumber on your own takes time and carries risk. ProCraft connects homeowners with pre-screened plumbing contractors who have been verified for licensing, insurance, and customer satisfaction ratings.
Every ProCraft plumber has passed our vetting process — so you skip the background research and get straight to getting your job done right.
Ready to hire a plumber you can trust? Find ProCraft-verified plumbers in your area — get matched and receive free quotes today.
Summary Checklist: Hiring a Plumber
- Verify license with your state board
- Request certificate of insurance (liability + workers’ comp)
- Get at least 3 written estimates
- Ask all 10 questions before signing
- Confirm permit responsibility
- Review and sign a written contract
- Never pay 100% upfront
- Watch for red flags
Taking these steps takes 30 minutes and can save you thousands. When in doubt, use ProCraft to find a vetted professional near you.