Boiler Installation Cost Toronto 2026

If your boiler is leaking, kettling, or simply getting old, the first question is almost always: how much will a new one cost? In Toronto and the GTA in 2026, boiler installation runs roughly $5,500 to $13,000 — a wide range, because the type of boiler and the condition of your existing setup make a real difference.

Here's exactly what you can expect to pay and what drives the number.

Quick Answer: 2026 Boiler Price Ranges

Boiler Type	Installed Price (2026)
High-efficiency combi boiler	$6,000 – $11,000
Condensing system boiler	$7,000 – $13,000
Conventional like-for-like swap	$5,500 – $9,500
Combi conversion (boiler + tank removed)	$6,500 – $12,000

All ranges include equipment, labour, the applicable permits and inspections. Significant gas-line upgrades, extensive re-piping, or electrical work are quoted separately when needed.

What Drives the Cost

1. Boiler Type and Brand

A wall-mounted combi boiler (heat plus hot water) and a dedicated condensing system boiler sit at different price points, and premium brands cost more than value lines. We install Navien and Rinnai combis most often in the GTA — both offer strong value and parts availability.

2. Replacement vs. Conversion

A like-for-like swap (same fuel, same type, same location, reusable venting) is the most affordable job. Converting an old atmospheric boiler to a modern condensing unit — or swapping a separate boiler and tank for one combi — costs more because it involves new near-boiler piping, PVC venting, and sometimes condensate drainage. It also delivers the biggest efficiency gain.

3. Condition of Your Existing Piping

Old, corroded near-boiler piping, undersized gas lines, or a chimney that needs lining all add to the job. We note these during the on-site assessment so there are no surprises — the quote you get is the price you pay.

The Permit and Inspection

Permit and inspection requirements depend on the project scope and municipality. Gas work must be performed by properly certified technicians through a TSSA-registered contractor. A proper quote should identify and include any approvals required for the specific job.

Comparing quotes? Ask each contractor: "Does your price include the gas permit, required safety inspection, and removal of the old unit?" Make sure you're comparing the same scope before you judge on price alone.

How to Keep Costs Reasonable

Replace proactively in spring or fall, not mid-winter when demand and pricing peak
Right-size the unit — oversizing wastes money up front and runs less efficiently
Bundle a boiler + tank into a single combi to cut long-term running costs
Get a written, itemized quote so you can compare scope, not just headline price

Want a real number for your home? See our boiler installation page or call for a fixed written quote across Toronto and the GTA.

Boiler Installation Cost — Common Questions

Boiler installation in the GTA in 2026 typically runs $5,500–$13,000 installed. A high-efficiency combi boiler runs $6,000–$11,000, a condensing system boiler $7,000–$13,000, and a like-for-like conventional swap $5,500–$9,500. Prices include equipment, labour, applicable permits and inspections.

A conversion replaces an old boiler (and often a separate tank) with a modern condensing combi, which requires new near-boiler piping, PVC venting, and sometimes condensate drainage and gas-line changes. That extra work costs more than reusing existing venting on a like-for-like swap, but it delivers the biggest efficiency gain and frees up space.

Permit and inspection requirements depend on the project scope and municipality. Gas work must be performed by properly certified technicians through a TSSA-registered contractor. We confirm and arrange any approvals required for your job.

Spring and fall (the shoulder seasons) generally offer the best availability and pricing. Mid-winter is the most expensive and busiest time because emergency no-heat demand peaks. If your boiler is showing its age, replacing it proactively in the off-season is almost always cheaper than an emergency replacement.

A well-maintained boiler typically lasts 15–25 years — often longer than a forced-air furnace. Annual servicing (descaling, pressure and combustion checks, heat-exchanger inspection) is the biggest factor in reaching the upper end of that range.

Boiler Installation Cost in Toronto & GTA — 2026 Guide