Water heater replacement cost in Ottawa
If your tank is leaking at the base, running out of hot water faster than it used to, or is past the 10-year mark, you are probably wondering what a replacement will cost. Here is a plain-language guide for Ottawa homeowners, with typical ranges from published sources (not our prices).
Typical price ranges (published sources)
These are typical ranges reported by cost guides. Your job can land above or below them.
| Type of job | Typical range | Source |
|---|---|---|
| Standard gas tank, like-for-like swap (40–50 gal) | about $1,200–$2,000 installed | Galaxy Plumbing, Ontario guide |
| Electric tank | about $1,600–$2,400 installed | Go Lime, Ontario 2026 guide |
| Gas tank | about $1,800–$2,800 installed | Go Lime, Ontario 2026 guide |
| Water heater installation, Canada-wide | $1,000–$1,850 | HomeStars Canada cost guide |
| Water heater installation, Ottawa reviews | average reported $2,727 (wide spread) | HomeStars Ottawa cost guide |
Sources: HomeStars Ottawa plumbing cost guide (updated Aug. 2026, based on 62 Ottawa homeowner reviews), HomeStars Canada plumbing cost guide, Go Lime, Galaxy Plumbing.
What moves the price
- Venting. A conventional (chimney-vented) tank is usually simpler than a power-vented tank, which needs a blower, wiring and PVC venting.
- Size and fuel. A 60-gallon tank costs more than a 40. Gas and electric units differ in both purchase price and install work.
- Access. A tank tucked in a finished basement closet takes longer to swap than one in an open utility room.
- Upgrades the old install needed. Missing expansion tanks, old shut-off valves, corroded connectors, or venting that no longer meets code all add work.
- Tankless conversions. Switching to tankless usually means new venting and often a larger gas line, so it sits in a much higher range than a tank swap.
Rented or owned?
Many Ottawa homes have a rented tank. Before replacing it, check your utility bill or rental agreement. If it is rented, you may need to contact the rental company about removal or a buyout, and that cost is separate from the installation.
Do I need a permit?
The City of Ottawa lists "replacing an existing hot water tank" among the projects that do not require a building permit (ottawa.ca, Projects not requiring building permits). The work still has to meet the Ontario Building Code, and gas work has its own rules. A new location, a new type of system or added piping may change the answer. Check our permit guide or ask the City if you are unsure.
Signs it is time
- Water pooling under the tank, or rust on the bottom seam
- Rusty or discoloured hot water
- Popping or rumbling noises as it heats
- The tank is 10–12+ years old (check the date on the rating label)
If water is actively leaking, close the cold-water valve on top of the tank and turn the unit off (gas to "pilot" or "off"; breaker off for electric) if it is safe to do so.
Get a personal quote from photos
Every Ottawa home is a little different, so we don't post one-size-fits-all prices. Send us:
- A wide photo of the tank and the space around it
- A close-up of the rating label (brand, size, date)
- A photo of the venting where it leaves the tank
A licensed plumber reviews every request and replies with a personal quote. No automatic estimates and no obligation. This is a small pilot, so we can't promise a response time, and the form is not for emergencies.