How to Choose a Plumber: 9 Questions to Ask Before You Hire

Most people go looking for a plumber at the worst possible moment: water on the floor, no hot water before work, or a toilet that will not stop running. That is exactly when it is easiest to hire the first number that answers. A few minutes of questions, even on the phone, can save you from a repair that has to be redone, a surprise bill, or a permit problem when you sell your home.

This guide walks through what to check, what to ask, and what should make you hang up and call someone else. It works whether you need an emergency repair today or you are planning a bathroom remodel next spring.

Start with the right kind of plumber

"Plumber" covers a lot of ground. Before you start calling, know roughly what kind of job you have:

• Service and repair: leaks, clogs, running toilets, faucets, garbage disposals, water heaters.
• Drain and sewer: main line backups, root intrusion, camera inspections, line replacement.
• Remodel and new construction: moving fixtures, re-piping, rough-in work for kitchens and bathrooms.
• Gas lines: gas appliance hookups and gas leak repairs, which many areas license separately.

Many companies do several of these, but not all of them. Asking "Is this the kind of work you do every week?" is a fast way to narrow your list.

The 9 questions to ask

1. Are you licensed, and for what?

Plumbing licenses in the US are issued by states, and in some places by counties or cities, so the rules depend on where you live. Ask for the license number and the name it is issued under, then look it up with your state or local licensing board. Confirm the license is active and covers the type of work you need. If a company tells you no license is needed for your job, check that claim with the licensing board rather than taking their word for it.

2. Do you carry liability insurance and workers' compensation?

Liability insurance covers damage the plumber causes to your home. Workers' compensation covers their employees if someone is hurt on your property. Ask for a certificate of insurance and check the dates. Without coverage, an accident during the job could become your problem.

3. How do you charge?

Plumbers commonly use one of a few pricing models: a flat price per job, an hourly rate plus parts, or a trip or diagnostic fee followed by a quote. None of these is wrong, but you should know which one applies before anyone shows up. Ask whether the trip fee is credited toward the repair if you go ahead.

4. Will I get a written quote before work starts?

For anything beyond a quick fix, ask for a written quote that lists the work, the parts, and the total. A good plumber will explain what could change the price, such as finding corroded pipe once a wall is open, and will check with you before going over.

5. Who will actually do the work?

Some companies send licensed plumbers; others send apprentices supervised by a licensed plumber; some subcontract. Any of these can be fine, but you want to know who is coming and who is responsible if something goes wrong.

6. Does this job need a permit, and who pulls it?

Water heater replacements, re-piping, sewer line work and remodels often require a permit and an inspection. Requirements vary by city and county. A professional plumber should know the local rules and pull the permit. Be cautious if someone suggests skipping it to save time; unpermitted work can cause trouble with insurance claims and home sales.

7. What warranty do you offer?

Ask separately about labor and parts. Manufacturers often warranty fixtures and water heaters, while the plumber's own warranty covers their workmanship. Get both in writing, and ask what happens if the same leak comes back next month.

8. Can you show me the problem?

A trustworthy plumber is happy to show you the leak, the clog on the camera screen, or the failed part. Seeing it yourself helps you understand the repair and makes it much harder for anyone to sell you work you do not need.

9. What are my options?

Many plumbing problems can be solved more than one way: repair or replace, a basic fixture or a premium one, a spot repair or a full line replacement. Ask for the options and the trade-offs of each, not just a single price.

Getting and comparing quotes

For planned work, try to get at least two or three quotes. When you compare them, make sure they describe the same job. One quote may include hauling away the old water heater, a new expansion tank, and the permit; another may not. The lowest number is not always the cheapest outcome.

What moves the price of a plumbing job, in general:

• How hard it is to reach the problem (behind finished walls, under slabs, in crawl spaces).
• Materials and fixture quality.
• Permit and inspection requirements in your area.
• After-hours, weekend or holiday service.
• Whether related problems turn up once the work begins.

Red flags

Keep looking if a plumber:

• Will not give a license number, or the license does not match the business name.
• Asks for full payment, or a large cash deposit, before any work starts.
• Gives a price over the phone for a complex job without seeing it, then raises it once on site.
• Pressures you with "this price is only good today."
• Recommends replacing everything without showing you why a repair will not work.
• Has no physical address, no reviews, or reviews that all sound the same.

When it is an emergency

If water is actively leaking, shut off the water first. Most homes have a main shutoff valve near where the water line enters the house or near the water meter, and many fixtures have their own shutoff valve underneath. Knowing where these are before you need them is one of the most useful things a homeowner can do. If you smell gas, leave the house and call your gas utility's emergency line or 911 from outside.

Once things are stable, you will still have time for a few of the questions above, even if it is just license, insurance, and how they charge.

Find a plumber near you

When you are ready to compare, browse plumbing services in the directory, read their reviews, and check how long they have been in business. You can also browse by city to see who serves your area.