Water Heater Installation & Repair in Ontario
Water heater work covers a few distinct jobs: replacing a failing tank, installing a new tankless unit, repairing leaks or pilot light issues, and swapping out a rented tank for one you own outright (or vice versa). Toronto's older housing stock means a lot of this work happens in tight basements and utility closets, often with venting or gas line changes that need to meet current code, not whatever was legal when the house was built. We've catalogued 96 businesses in the city that do this work, ranging from small owner-operated plumbing outfits to larger crews that run installs every day.
What to check before you hire
Confirm the company pulls permits when required (gas water heaters almost always need one in Toronto) and that technicians are licensed gas fitters if you're dealing with gas rather than electric. Ask whether the quote includes removal and disposal of the old tank, and whether it's a flat price or subject to change once they're on site. A good contractor will ask about your household's hot water usage before recommending a size, not just swap in the same capacity you had.
How we score contractors
Our rankings weigh review consistency, response times, and how businesses handle complaints, not just star averages. The full method is laid out on our methodology page, and you can see how these 96 stack up against each other, plus other trades, on the best plumbers in Toronto guide.
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All water heater installation & repair, ranked by score and relevance
264 businesses. The order weighs each business's overall score by how much of its reviewed work is water heater installation & repair, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
Enquiries submitted through this site's contact forms may be passed to partner providers who can carry out the work, and the site may receive a referral fee. Rankings and scores are determined only by the site's published method and are not affected by referral fees.
Common questions about water heater installation & repair
- How much does water heater installation cost in Toronto?
- A standard tank replacement typically runs from the mid-hundreds to around $2,000 depending on tank type, size, and whether venting or gas line work is needed. Tankless units cost more upfront, often $3,000 to $5,000 installed, because they usually require additional venting and sometimes electrical or gas line upgrades.
- How often does a water heater need to be replaced?
- Most tank water heaters last 8 to 12 years. If yours is rusting at the base, making rumbling noises, or not holding temperature, it's worth getting it inspected rather than waiting for it to fail outright and flood the area.
- What should I expect on installation day?
- Expect the water and gas or power supply to be shut off, the old tank drained and removed, and the new one connected, tested, and checked for leaks. A straightforward tank swap usually takes two to four hours; tankless installs or venting changes can take longer.
- How can I tell if a water heater repair was done well?
- Ask for a test run with hot water at full flow before the technician leaves, and check that any pressure relief valve and shutoff valves were replaced or inspected, not just the obvious faulty part. A company that explains what failed and why is generally more trustworthy than one that just swaps parts silently.