2026 Pricing Guide
What Does a Tankless Water Heater Cost in Toronto?
Toronto-area installers publish about $3,500 to $6,500 installed for most homes. This page lists who published what and when, then covers the add-ons that move the price and how to compare quotes.
Quick Answer: Tankless Water Heater Cost in Toronto
Most published Toronto-area prices land between $3,500 and $6,500 installed. A simple gas swap sits near the low end. Extra venting, a larger gas line, or an electrical panel upgrade pushes the total up. The only way to know your number is a written quote for your house.
Market ranges published by other installers, checked September 2026. Not a Megacity quote.
What Local Installers Publish
We read the public price pages of five Toronto-area installers in September 2026. Each range is quoted as the company published it, with the date shown on its page where there was one. Ranges differ because the installers price different scopes.
| Installer | Published price | Scope | Page date |
|---|---|---|---|
| Installer A (GTA) | $3,500 – $6,500 | Installed, most GTA homes | Page dated May 30, 2026 |
| Installer B (Ontario) | $2,800 – $5,500 | Fully installed, gas tankless | 2026 guide |
| Installer C (Ontario) | $3,900 – $6,500 | All-in, most Ontario homes | Page dated December 2024 |
| Installer D (Toronto) | $5,200 – $8,500 gas, $4,500 – $7,000 electric | Installed | Undated page |
| Installer E (Toronto) | From $3,500 | Installed | Page dated May 11, 2026 |
Five Toronto-area installers' public price pages, read September 19, 2026. Prices on those sites may have changed. We keep the source pages on file. These are other companies' figures, not Megacity prices.
Why Two Tankless Quotes Can Be Far Apart
The heater itself is only part of the bill. These are the items that most often change the total, with the figures the same installers publish.
| Item | Published cost | Why it comes up |
|---|---|---|
| Venting | $400 – $1,200 for a vent upgrade (one GTA installer). $250 – $600 for a vertical roof vent or long horizontal run (another installer). | Tankless units need a different vent than a tank. Old chimney vents often cannot be reused. |
| Gas line | One published example: a 1/2 inch line upgraded to 3/4 inch over an 8 ft run cost $580. | A tankless heater burns much more gas at once than a tank, so the existing line has to be able to supply it. |
| Electrical (electric models) | One GTA installer puts a whole-house electric install with a panel upgrade at $2,700 – $6,000. | Electric tankless units draw a lot of power. An older panel may not have room. |
| Flow rate and fuel | Gas whole-house units cost more than point-of-use units. Propane and electric sit at different price points. | Size to the fixtures you run at the same time, not to the number of people. |
Same installer pages, read September 19, 2026. The gas line figure is one job example, not a range.
How to Compare Tankless Quotes
- Brand, model, and flow rate in gallons per minute, written on the quote.
- What is included for venting, gas line work, permit, and removal of the old heater.
- Warranty terms on the unit and on the labour, in writing.
- The company's licence and insurance, and whether a licensed gas fitter does the work.
Want the Megacity side of it? See our tankless water heater installation page, or read rent, lease-to-own or buy if you are weighing a lease.
Tankless Cost FAQs
How much does a tankless water heater cost in Toronto?
Is that the price Megacity charges?
Why is a tankless heater more expensive to install than a tank?
Are there rebates for a tankless water heater?
Can I lease a tankless water heater instead of paying upfront?
How do I compare tankless quotes?
Get a Written Tankless Quote
Tell us what you have now and we will quote your house, not an average. Ask about lease-to-own through Enbridge Sustain when you call.
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