What does a tankless water heater cost in the GTA?

A tank-to-tankless conversion in the GTA runs $4,200 to $6,400 installed. A straight tankless-to-tankless swap is $3,200 to $4,600.

Will it save me money?

Most GTA households cut water-heating energy use by 25 to 35 percent, and the unit lasts roughly twice as long as a tank.

Do I need a bigger gas line?

Often yes on older homes. The calculator includes an allowance so your quote is not a surprise.

4.9★ from 743 GTA homeowners

Tankless Water Heater Installation Cost in the GTA — Get Your Price Instantly

High-efficiency tankless units supplied, vented and commissioned. See real tankless water heater installation prices in the GTA in under 60 seconds.

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Typical tankless water heater installation prices in the GTA
Job type	Typical price
Straight tankless swapLike-for-like replacement	$3,200 – $4,600
Tank to tankless conversionNew venting and condensate	$4,200 – $6,400
With gas line upsizeIncludes permit and TSSA sign-off	$5,200 – $7,800

Ranges reflect the GTA labour and material costs. Your calculator result is tailored to your answers.

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Licensed, insured, WETT & TSSA certified · 4.9★ from 743 GTA reviews

What the GTA homeowners say

Documentation on everything
Photos, readings, and a written summary after every visit. Makes it easy to keep records for the house file.

Doug T. · 2026-01-11

Bundled two services, saved the trip fee
Had the chimney and the dryer vent done on the same visit. Cheaper and half the disruption.

Farah N. · 2025-12-27

A real person answers the phone
No call centre, no chasing. Booked in two minutes and got a text when the truck was on the way.

Ryan K. · 2026-02-28

Reliable across three jobs
Used them for a sweep, a dryer vent, and a fireplace service. Same standard every time and the same technician twice, which I appreciated.

Helena B. · 2026-04-17

Tankless Water Heater Installation pricing questions

What does a tankless water heater cost in the GTA?: A tank-to-tankless conversion in the GTA runs $4,200 to $6,400 installed. A straight tankless-to-tankless swap is $3,200 to $4,600.
Will it save me money?: Most GTA households cut water-heating energy use by 25 to 35 percent, and the unit lasts roughly twice as long as a tank.
Do I need a bigger gas line?: Often yes on older homes. The calculator includes an allowance so your quote is not a surprise.

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