The best plumbers in Waterloo in 2026 are Pro House Maintenance, Cross Heating and Air Conditioning and Pure Life Plumbing and Drains, then five more top-rated firms. We started with 72 businesses on Google Maps. Only 13 Waterloo plumbers with a website and 4.5 stars or higher from 10 or more reviews made the cut. A gas tank water heater costs $1,800 to $2,800 to replace in Ontario.
- Only 13 of the 72 Waterloo businesses we found on Google Maps passed every filter, including 4.5 stars from 10 or more reviews.
- Five of the 7 ranked Waterloo plumbers hold a perfect 5.0 Google rating.
- A replacement gas tank water heater costs $1,800 to $2,800 in Ontario, according to a 2026 guide.
- Plumbers in the Kitchener-Waterloo-Barrie region earn a median wage of $32.50 an hour, Job Bank reports.
- The City of Waterloo takes up to 45% off the stormwater fee for homes that manage rainwater on site.
| Rank | Company | Best for | Credentials | Google rating | Based in |
|---|---|---|---|---|---|
| 1 | Pro House Maintenance | Comparing vetted plumbers for free | Every pro: licences, WSIB, insurance, references, background | Not applicable (matching service) | Serves Waterloo |
| 2 | Cross Heating & Air Conditioning Ltd. | Water heaters plus heating and cooling | TSSA registration | 5.0 (278 reviews) | Waterloo |
| 3 | Pure Life Plumbing & Drains Inc | Same-day calls and a one-year warranty | None stated on its website | 5.0 (246 reviews) | Waterloo |
| 4 | Flowline Plumbers Waterloo | Flat-rate pricing and late hours | Founded 2003 (company-stated) | 5.0 (134 reviews) | Waterloo |
| 5 | Pipe Dreams Plumbing Waterloo | Drain cleaning and urgent leaks | TSSA registration | 5.0 (58 reviews) | Waterloo |
| 6 | Transparent Backflow Services | Backflow testing and repairs | None stated on its website | 5.0 (36 reviews) | Waterloo |
| 7 | SMART HOME MECHANICAL & RENOVATIONS | Plumbing tied to a renovation | None stated on its website | 4.9 (37 reviews) | Waterloo |
| 8 | Reliance Heating, Air Conditioning & Plumbing | Water heater rentals and protection plans | None stated on its website | 4.8 (2,877 reviews) | Waterloo |
Who are the best plumbers in Waterloo in 2026?
The best plumbers in Waterloo in 2026 are Pro House Maintenance, Cross Heating and Air Conditioning and Pure Life Plumbing and Drains. Flowline Plumbers, Pipe Dreams Plumbing, Transparent Backflow Services, Smart Home Mechanical and Reliance complete the top eight. Five of the seven ranked plumbers hold a perfect 5.0 Google rating.
1. Pro House Maintenance: best for comparing vetted plumbers for free
Pro House Maintenance is our free matching service, and it ranks first because it does the screening for you. Plumbers we match in Waterloo have passed WSIB, insurance, reference and background checks. You describe the job once, get several written quotes and pick the one you want. Our satisfaction guarantee covers the plumber you hire.
Waterloo has a short list of rated plumbers. Our searches found 72 businesses, but only 13 Waterloo plumbers held 4.5 stars from 10 or more reviews. Several of the 7 picks are heating firms or specialists, so a matched plumber can save you a few calls.
- Trade licences. We confirm the plumber holds Ontario trade certification, plus a TSSA registration when the job involves gas lines or gas water heaters.
- WSIB clearance and liability insurance. We confirm a current WSIB clearance and commercial general liability insurance before a pro joins our network.
- Reviews and references. We read public reviews and speak with past clients before a pro is accepted, looking for patterns, not one-off complaints.
- Background checks. We run background checks before a pro is matched with homeowners, because the people in your home matter as much as the work.
- Tell us about the job. Share the project and your address through the free quote form. It takes about a minute.
- Get matched with vetted pros. We match you with several pros who have already passed our checks and serve your area.
- Compare written quotes. Each pro gives you a written quote, so you can compare price, scope and timing side by side.
- Hire with a guarantee behind you. You choose who to hire. Work from a pro we matched you with is backed by our satisfaction guarantee; ask us for the terms before you sign.
2. Cross Heating & Air Conditioning Ltd.: best for water heaters plus heating and cooling
- Google rating 5.0 from 278 reviews checked Oct 4, 2026
- Verified TSSA registered fuels contractor FS R0076567197 checked Oct 4, 2026
- Founded 1987 company website
- Based in Waterloo
- Visit the Cross Heating & Air Conditioning Ltd. website
Cross Heating and Air Conditioning is based on Northfield Drive West in Waterloo and holds a 5.0 Google rating from 278 reviews. Its website says it has served Waterloo, Listowel and Hanover since 1987. It installs and repairs water heaters, softeners and filtration, and we matched it to an active TSSA fuels registration.
- Watch-outs: It is mainly a heating and cooling company, so confirm it handles your plumbing job, such as a drain or a leak.
- Best for: A new water heater or softener from a TSSA registered firm.
3. Pure Life Plumbing & Drains Inc: best for same-day calls and a one-year warranty
- Google rating 5.0 from 246 reviews checked Oct 4, 2026
- Warranty One-year worry-free warranty company website
- Based in Waterloo
- Visit the Pure Life Plumbing & Drains Inc website
Pure Life Plumbing and Drains lists an office on Erb Street West in Waterloo and holds a 5.0 Google rating from 246 reviews. Its website describes a small, family-owned company that offers same-day emergency service and a one-year worry-free warranty. It handles drains, sewer blockages, cast iron removal, sump pumps and bathroom renovations.
- Watch-outs: It also serves Norfolk, Brant and Oxford County, so ask how quickly it can reach Waterloo.
- Best for: Clogged drains and old cast iron pipes.
4. Flowline Plumbers Waterloo: best for flat-rate pricing and late hours
- Google rating 5.0 from 134 reviews checked Oct 4, 2026
- Founded 2003 company website
- Based in Waterloo
- Visit the Flowline Plumbers Waterloo website
Flowline Plumbers Waterloo is based on Northfield Drive West in Waterloo and holds a 5.0 Google rating from 134 reviews. Its website says it has served the region since 2003 and is open 7 days a week, 7am to 11pm. It promises upfront flat-rate pricing and states WSIB clearance and insurance.
- Watch-outs: The site shows “4.9 · 500+ Google Reviews”, likely across several locations, so read this location’s reviews.
- Best for: An evening repair at a quoted flat price.
5. Pipe Dreams Plumbing Waterloo: best for drain cleaning and urgent leaks
- Google rating 5.0 from 58 reviews checked Oct 4, 2026
- Verified TSSA registered fuels contractor FS R000076641991 checked Oct 4, 2026
- Based in Waterloo
- Visit the Pipe Dreams Plumbing Waterloo website
Pipe Dreams Plumbing Waterloo lists an office on King Street North in Waterloo and holds a 5.0 Google rating from 58 reviews. Its website offers drain cleaning, residential repairs and 24/7 emergency plumbing for leaks and burst pipes. We matched it to an active TSSA fuels registration.
- Watch-outs: The website is brief and lists no warranty or founding year, so ask for both in writing.
- Best for: A kitchen, floor or main line drain clog.
6. Transparent Backflow Services: best for backflow testing and repairs
- Google rating 5.0 from 36 reviews checked Oct 4, 2026
- Based in Waterloo
- Visit the Transparent Backflow Services website
Transparent Backflow Services is based on Alexmuir Place in Waterloo and holds a 5.0 Google rating from 36 reviews. Its website says it specializes in backflow testing, repairs, installations and surveys, and its technicians are licensed. It serves Kitchener, Cambridge, Guelph, Hamilton, Toronto and other Southern Ontario cities.
- Watch-outs: It is a backflow specialist, so call someone else for general repairs or water heaters.
- Best for: A yearly backflow device test or a new backflow preventer.
7. SMART HOME MECHANICAL & RENOVATIONS: best for plumbing tied to a renovation
- Google rating 4.9 from 37 reviews checked Oct 4, 2026
- Based in Waterloo
- Visit the SMART HOME MECHANICAL & RENOVATIONS website
Smart Home Mechanical and Renovations is based on Cedarvale Crescent in Waterloo and holds a 4.9 Google rating from 37 reviews. Its website claims more than 15 years of experience and 24/7 emergency repairs. It offers plumbing, drains, water heaters, heating, cooling and renovation work across Kitchener, Waterloo, Cambridge and Guelph.
- Watch-outs: The site says it is licensed but gives no licence number, so ask for the plumber’s certificate.
- Best for: A bathroom or basement project that needs plumbing and heating.
8. Reliance Heating, Air Conditioning & Plumbing: best for water heater rentals and protection plans
- Google rating 4.8 from 2,877 reviews checked Oct 4, 2026
- Based in Waterloo
- Visit the Reliance Heating, Air Conditioning & Plumbing website
Reliance Heating, Air Conditioning and Plumbing has a Bathurst Drive location in Waterloo with a 4.8 Google rating from 2,877 reviews, the most on this list. Its website offers water heater rentals and purchases, plumbing and electrical services, and protection plans. It says its HVAC technicians are Red Seal.
- Watch-outs: Read any rental or protection plan contract closely, including the buyout and cancellation terms.
- Best for: Homeowners who would rather rent a water heater than buy one.
How much does plumbing work cost in Waterloo?
A replacement gas tank water heater costs $1,800 to $2,800 in Ontario, and a tankless unit costs $3,900 to $6,500, a 2026 guide says. Plumbers in the Kitchener-Waterloo-Barrie region earn a median of $32.50 an hour. The City of Waterloo offers up to 45% off the stormwater fee.
| Job | Typical cost (CAD) | Source |
|---|---|---|
| Electric tank water heater, replaced | $1,600 to $2,400 | Go Lime, 2026 |
| Gas tank water heater, replaced | $1,800 to $2,800 | Go Lime, 2026 |
| Tankless water heater, installed | $3,900 to $6,500 | Go Lime, 2026 |
| Tank water heater rental | $20 to $55 a month | Go Lime, 2026 |
| Plumber wage, Kitchener-Waterloo-Barrie (median) | $32.50 an hour | Job Bank, 2025 |
| City of Waterloo stormwater credit | Up to 45% off the stormwater fee | City of Waterloo |
Wages are what plumbers earn, not what a company bills, so expect a service call to cost more than the hourly wage. Job Bank’s regional range runs from $20.00 to $48.08 an hour. A rental tank costs less upfront but adds up over the years.
For national leak and repair data, read our 2026 plumbing statistics report. To price your own job, compare free plumbing repair quotes in Waterloo from screened local plumbers.
How do you choose a plumber in Waterloo?
Choose a Waterloo plumber by checking the plumber’s trade certificate, WSIB clearance and liability insurance, then get a written contract. Ontario treats plumbing as a compulsory trade. Ask the City of Waterloo about permits, use a TSSA registered contractor for gas, and keep the deposit at 10% or less.
- Check the licence. Ask for the plumber’s Ontario Certificate of Qualification. For gas lines or a gas water heater, also check the company in TSSA's contractor directory.
- Confirm WSIB clearance. Ask for the company’s WSIB account number and confirm a current clearance on WSIB’s free eClearance lookup.
- Ask for proof of liability insurance. A certificate of commercial general liability insurance should name the company that will do the work.
- Ask about city licences and permits. Ask Waterloo whether the job needs a municipal licence or building permit before work starts.
- Get it in writing. Under Ontario law, any home renovation contract worth more than $50 must be in writing, and the final price cannot exceed an estimate by more than 10% unless you agree (Ontario consumer protection rules).
- Keep the deposit small. Ontario recommends a down payment of no more than 10%, and never paying in full before the work is done.
Ontario’s advice on deposits is direct: “Keep down-payments to a minimum (we recommend no more than 10%) and never pay the full amount of the contract before the work is all done.” With only 13 Waterloo firms clearing our bar, get at least two written quotes before you sign.
Pro House Maintenance runs the WSIB, insurance, reference and background checks before a plumber is matched with you. If a burst pipe has already soaked the basement, you can also find water damage restoration in Waterloo through the same request.
How did we rank these Waterloo plumbers?
We ranked Waterloo plumbers with data, not ads. Our Google Maps searches for Waterloo found 72 businesses, but only 31 had plumbing as their main category. We kept 13 that are based in Waterloo, have a working website and hold 4.5 stars from 10 or more reviews, then ranked them by review-weighted rating.
| Step | Businesses remaining |
|---|---|
| Found on Google Maps | 72 |
| Primary Google category is a plumber | 31 |
| Open, with a website of its own | 24 |
| In Waterloo (by address or Google map pin) | 24 |
| 4.5+ stars from 10+ Google reviews | 13 |
| Website readable when checked | 12 |
| Listed on this page (top ranked) | 7 |
One of the 13 had a website we could not read, so 12 were ranked. The score blends each rating with its review count, so a 4.9 from 37 reviews edges a 4.8 from 2,877. On October 4, 2026, we also searched TSSA’s directory for the top 15 Waterloo plumbers.
We removed a design studio and a handyman service whose Google listings named them plumbers. Facts marked “company website” come from each plumber’s own pages, and we keep exact quotes in our research files. See something out of date? Please contact our editorial team and we will review it.
What do Waterloo homeowners ask before hiring a plumber?
Waterloo homeowners ask about plumber rates, water heater prices, licences and contracts before they book. These answers draw on Job Bank, a 2026 Ontario price guide, Skilled Trades Ontario, the City of Waterloo and Ontario consumer rules. Each one stands alone, so go straight to the question that fits your job.
How much does a plumber cost in Waterloo?
Job Bank lists plumber wages in the Kitchener-Waterloo-Barrie region from $20.00 to $48.08 an hour, with a median of $32.50. That is what plumbers earn, not what a company bills. For a common job, a 2026 Ontario guide puts a replacement electric tank water heater at $1,600 to $2,400.
Does Waterloo pay for flood protection like a backwater valve?
We found no City of Waterloo backwater valve subsidy when we checked. The city does offer a stormwater credit of up to 45% off the stormwater fee on your utility bill if you manage rainwater on your property. Applications are taken by email and mail.
Do plumbers need a licence in Waterloo?
Yes, a provincial one. Plumbing is a compulsory trade in Ontario. Skilled Trades Ontario sets training at 9,000 hours, with 8,280 on the job and 720 in school, and the certificate must be renewed. Ask for the number and check it on the Public Register.
What should a plumbing contract include in Ontario?
Ontario law requires a written contract for any home renovation worth more than $50. List the work, the price, the start date and the warranty. The final price cannot be more than 10% over the estimate unless you agree to new work or a new price.
Why does this list only include 7 plumbers in Waterloo?
Waterloo's field is small. Our searches found 72 businesses, but only 31 listed plumbing as their main Google category. Just 13 were Waterloo plumbers with a working website and 4.5 stars from 10 or more reviews. We list the 7 with the strongest review-weighted ratings.
Is Pro House Maintenance free to use?
Yes. Pro House Maintenance is free for Waterloo homeowners. You tell us about the job once, and we match you with several plumbers who have passed WSIB, insurance, reference and background checks. You compare their written quotes, hire the one you prefer, and our satisfaction guarantee backs the work.
Where can you find plumbers near Waterloo?
The closest plumbers lists to Waterloo cover Guelph (24 km away), Milton (52 km away) and Hamilton (57 km away). Each list follows the same method: 4.5-star Google ratings from 10 or more reviews, official registry checks where Ontario requires a licence, and free vetted matching from Pro House Maintenance at number one.
- Best plumbers in Guelph (24 km from Waterloo)
- Best plumbers in Milton (52 km from Waterloo)
- Best plumbers in Hamilton (57 km from Waterloo)
- Compare free plumbing repair quotes in Waterloo from vetted local pros
- Best plumbers across Ontario, city by city
- Plumbing Repair statistics and cost data from our research team
- Go Lime, Water Heater Replacement Cost in Ontario (2026 Guide)
- Job Bank (Government of Canada), Plumber wages in Ontario (updated November 19, 2025)
- City of Waterloo, Apply for a stormwater credit
- Skilled Trades Ontario, Plumber trade information
- TSSA, Authorized Heating Fuel Contractors directory
- Government of Ontario, Your rights when starting home renovations or repairs