Tankless water heater installed in Calgary, what should the price be?

A tankless gas water heater supplied and installed in Calgary typically runs $2,200 to $5,000, and if the gas line needs to be upgraded to handle the higher BTU demand, add another $400 to $1,500 on top of that. Where your quote lands depends heavily on a few variables specific to your house.

What moves the price

The unit itself is the biggest factor: entry-level residential tankless heaters cost less than high-efficiency condensing models, and the labour to install them differs too. Condensing units also need a condensate drain and their own venting, which changes the installation. Where the heater goes matters as well. A straightforward swap in a utility room with an existing gas line nearby costs less than a new location that requires running a longer gas line, adding a dedicated cold-air intake, or cutting through an exterior wall.

Calgary's hard water is worth factoring into the decision. Scale can build up inside a tankless unit, so check the manual for the descaling interval, and ask whether the installer includes the first service in the price.

After-hours or emergency installs carry a premium, roughly $150 to $250 an hour versus $85 to $150 during regular hours, plus a call-out fee that often runs $50 to $150 or more.

Permits and certification in Calgary.

A tankless unit is almost never a straight like-for-like swap. Changing from a tank to a tankless heater, upgrading the gas line, or modifying the venting all trigger permit requirements under the City of Calgary. The City issues both the plumbing and gas permits here. A homeowner in Calgary cannot take out a gas permit unless they are themselves an Alberta-certified journeyman gasfitter; gas work on a tankless installation must be done by a certified gasfitter under a gas permit. The contractor pulls the permit, and the City inspects the work.

The gas code in force in Alberta is CSA B149.1:25, in effect since March 1, 2026. The gasfitter designs the installation to that standard and the City's inspector signs off.

What a fair quote includes.

Ask for a written, itemized quote that covers:

• The unit by make, model and BTU rating
• Labour (fixed price or hourly rate plus call-out fee)
• Any gas line work and the materials involved
• Venting, condensate drain if applicable, and any wall penetrations
• The permit fee and who pulls it
• Removal and disposal of the old unit
• GST (5%)
• Warranty terms on both parts and labour, in writing

Before signing, ask to see the gasfitter's Alberta trade certificate, confirm the contractor holds an Alberta prepaid contracting licence if you are paying any deposit before the work is complete, and request a WCB-Alberta clearance letter.

Before the quote is finalized, ask the gasfitter directly which permits are required for this specific installation and whether the City inspection is included in the price or billed separately if a re-inspection is needed.