Gas boiler & water heater repair

Gas boiler and water heater repair in Canada

Updated 4 November 2026

A minor gas boiler or water heater repair in Canada usually costs CA$150 to CA$400, while replacing a standard tank water heater runs about CA$1,200 to CA$2,500 with permits. Diagnostic visits typically cost CA$89 to CA$129, so describe the fault on BlaBlaPrice to compare current quotes from local sellers.

Licences and gas permits

In British Columbia and Ontario, gas appliance work must be done by a licensed gas fitter. In British Columbia, replacing a gas boiler almost always needs a gas permit from the provincial safety authority, and the permit fees we found ran from CA$80 to CA$220 depending on the appliance. Ask the seller who applies for the permit and whether its cost is in the quote.

Season and timing

Winter runs from December to February, and the heating season peaks in those months. Book a check in November, before the coldest weeks, so the boiler is ready when the heat comes on. A boiler that fails in January leaves a house without heat in the coldest weeks, so an autumn check is a good idea.

How it is priced and what to check

Repairs are quoted per job, with parts and labour, and the diagnostic is often charged separately. Weekend diagnostic rates are higher than weekday rates, so book a weekday visit if you can. Ask for the repair warranty in writing, and ask whether the tank size or boiler type changes the price. Use litres for tank size and kilowatts for boiler output when you describe the unit.

Where and when

Say which city you are in, Toronto, Montreal, Vancouver, Calgary or Ottawa, or another city, and whether you need a visit in the morning or the afternoon. Tell the seller the appliance age and the boiler type, because an older unit may need parts that are harder to find.

What to write in your request

Give the device type, the make and model, the fault or service needed, the boiler type, the appliance age, your address area, the date you want the work done, the repair warranty you want and your budget. Photos of the data label and of the fault help sellers quote the job accurately.

On BlaBlaPrice you describe the problem in your own words in a chat, and you can add a photo. The AI asks for anything missing, looks through sellers' websites and price lists in Canada, and shows the prices and businesses it finds. Sellers registered on BlaBlaPrice reply in the chat with their own price and terms. Your contact details stay hidden, and buyers pay nothing. Start from the home page, or see Repair & servicing of appliances & electronics for related work.