Plumbing problems have a way of feeling urgent. A leaking pipe, a broken water heater, a backed-up drain — the discomfort pushes homeowners to hire quickly, often without asking a single meaningful question. That urgency is exactly when bad hires happen.

Even when it’s not an emergency, most people hire a plumber the same way: they call whoever comes up first, accept a price without understanding what it covers, and hope for the best. When things go wrong — and they do — they have no documentation, no recourse, and no clear picture of who is responsible.

The questions in this guide change that. They slow you down just enough to hire smart — whether you have a week to plan or you’re dealing with water on the floor right now.

“The calls I get from homeowners in trouble almost always start the same way: ‘I hired someone fast and didn’t ask enough questions.’ Plumbing mistakes are expensive to fix and easy to hide behind walls. The two minutes you spend verifying a licence and asking about the warranty are worth far more than the time you think you’re saving by just picking whoever is available.”

— Dritan Zaka, licensed master plumber with 19 years of experience in residential and light commercial plumbing in the local area

Before You Call Anyone

image 15
Questions to Ask a Plumber Before You Hire One 1

Is this actually a plumbing emergency?

Before you start calling plumbers, assess what you’re dealing with. A burst pipe spraying water requires immediate action. A slow drain, a dripping tap, or a hot water heater that’s underperforming does not. The distinction matters because emergency rates — often charged after hours, on weekends, or when a homeowner is visibly panicked — can be two to three times the standard rate.

If water is actively causing damage, shut off your main water supply first. In most homes it’s located near the water meter or where the supply line enters the building. Then call. If it’s not an emergency, take the time to get multiple quotes.

Do I need a plumber or a handyman?

Not all plumbing work requires a licensed plumber. Simple fixture swaps — replacing a faucet, installing a new showerhead — can often be done by a competent handyman. But anything that involves moving pipes, connecting to the main supply or drain, or work that requires a permit must be done by a licensed plumber. Knowing which category your job falls into helps you hire the right person at the right price.

Questions to Ask Before Hiring

a man working on a pipe in a cabinet
Questions to Ask a Plumber Before You Hire One 2

Are you a licensed plumber in this region or state?

This is the first question, every time. Plumbing is a licensed trade in every Canadian region and most US states. A licensed plumber has completed a formal apprenticeship, passed a technical exam, and is accountable to a regulatory body. An unlicensed person doing plumbing work may not know the code, may not pull the required permits, and leaves you with no recourse if the work fails.

Ask for the licence number and verify it. In many regions, you can check the relevant trade licensing body. Other regions have equivalent bodies.

What a good answer looks like: A licence number given immediately, with the class of licence specified — journeyperson or master, depending on the scope of work.

Do you carry liability insurance and workers’ compensation coverage?

Liability insurance covers damage the plumber causes to your property. Workers’ compensation coverage (or equivalent workers’ compensation in other regions and US states) covers their workers if injured on your property. Without it, you may be liable for an injury that happened in your home.

Ask for a certificate of insurance and verify it. For workers’ compensation coverage in many regions, you can request a clearance certificate directly from the workers’ compensation coverage portal.

For a full breakdown: Questions to Ask a Plumber About Licensing and Insurance

What a good answer looks like: A current certificate of insurance and workers’ compensation coverage clearance, provided within 24 hours of asking.

Are you a journeyperson or master plumber, and does my job require a master?

In many regions and many other jurisdictions, certain plumbing work — particularly work that connects to the main supply or drain stack — must be performed or directly supervised by a master plumber. A journeyperson plumber is qualified for most residential work but may be limited on complex jobs. Ask which licence class your job requires and confirm the person doing the work holds it.

What a good answer looks like: A clear explanation of their licence class and confirmation that it’s appropriate for your specific job.

Have you done this type of job before, and recently?

Plumbing covers a wide range of work — from drain cleaning to full bathroom rough-ins to water heater replacements to sump pump installations. Ask specifically whether the plumber has done your type of job in the last 12 months. Recent relevant experience matters more than years in the trade.

What a good answer looks like: Specific examples of comparable recent jobs, ideally with photos or references available.

Questions About the Quote

Is this a flat-rate quote or an hourly rate?

Most plumbers quote either a flat rate (a fixed price for the job) or an hourly rate plus materials. Both are legitimate — but you need to know which one you’re agreeing to before work starts. Hourly rates expose you to cost overruns if the job takes longer than expected. Flat rates give you certainty but may come with exclusions if unexpected complications arise.

For a full breakdown: Questions to Ask When Getting a Plumbing Quote

What a good answer looks like: A clear statement of the billing structure, with the rate or total price confirmed in writing before work begins.

What is and isn’t included in this price?

Materials, labor, permit fees, disposal of old fixtures or equipment — ask what’s in the price and what isn’t. A low quote that excludes materials or a permit fee isn’t necessarily a better deal. Get the full picture before comparing.

What could cause the price to change?

Even on a flat-rate job, unforeseen conditions — corroded pipe behind a wall, inadequate water pressure, code-non-compliant existing work — can add cost. Ask the plumber upfront what conditions would trigger a price change and how that would be communicated and documented.

What a good answer looks like: A clear list of potential variables, with a commitment to notify you in writing before any additional work begins.

Questions About the Job Itself

Do you pull your own permits?

Any plumbing work that affects the supply or drain lines, installs new fixtures in a new location, or is required by your municipality to be inspected must be done under permit. The permit must be pulled by the licensed plumber performing the work — not by you as the homeowner.

A plumber who suggests you pull your own permit, or who says permits aren’t required when they obviously are, is raising a serious red flag. For a complete guide: Questions to Ask a Plumber About Permits and Inspections

What a good answer looks like: “We pull all required permits. It’s included in our process and our pricing.”

What is the timeline, and what could affect it?

For larger plumbing jobs — a bathroom renovation, a water heater replacement, a full re-pipe — ask for a timeline. When will work start? How long will it take? What would cause delays? For emergency work, ask how quickly they can arrive and what their realistic response time is.

Who will actually be doing the work?

Will the licensed plumber you’re speaking with be on the job, or will an apprentice or assistant be doing the work while the plumber supervises remotely? On most residential jobs, an apprentice doing the hands-on work under a licensed plumber’s supervision is acceptable — but you should know that’s the arrangement, and the licensed plumber should be reachable and present for key stages.

Questions About Emergencies

If you’re dealing with an active plumbing emergency, the questions are slightly different — faster, more focused. See: Questions to Ask a Plumber About Emergency Plumbing

The core questions in an emergency:
– What is your emergency rate, and does it apply to the full job or just the after-hours portion?
– How quickly can you be here?
– Will you provide a written price before starting work?

Questions About Warranties

What warranty do you provide on your work?

A reputable plumber offers a written warranty on their workmanship — typically one year minimum. Materials may carry separate manufacturer warranties. Get both in writing before paying.

For a full breakdown: Questions to Ask a Plumber About Warranties on Their Work

What a good answer looks like: A written warranty document specifying duration, what’s covered, what’s excluded, and how to make a claim.

Red Flags to Watch For

No licence number when asked. A licensed plumber has a number and will give it to you without hesitation.

Asking for cash only with no receipt. Cash payments remove your paper trail. Always pay by cheque or e-transfer.

Quoting verbally without a written confirmation. Any price you agree to should be in writing before work starts.

Recommending extensive additional work on the spot. A drain cleaning that suddenly becomes a full pipe replacement, diagnosed without any investigation, is a common upsell tactic. Get a second opinion before agreeing to major unplanned work.

No permit for work that clearly requires one. If the job involves anything beyond a simple fixture swap and the plumber says no permit is needed, verify that with your municipality.

For a full guide: Red Flags When Hiring a Plumber

Before They Start: A Quick Checklist

  • Licence number verified independently
  • Certificate of insurance and workers’ compensation coverage clearance received
  • Written quote with scope, inclusions, and exclusions confirmed
  • Payment terms agreed in writing
  • Permit responsibility confirmed
  • Warranty terms discussed

Related Questions

Have a question we didn’t cover? Submit it below.

Was this question list helpful?

by WikiQuestions