Cost to replace a furnace in Seattle, WA (2026)
The cost to replace a furnace in Seattle, WA averages about $6,500, though real quotes vary from $3,600 to $11,500 depending on the specifics of your home. Prices here sit above the national average.
What drives the cost
- Fuel type (gas, electric, oil) and efficiency (AFUE)
- Home size and BTU output needed
- Ductwork condition
- Brand and install complexity
What's typically included
- New furnace unit
- Removal of old unit
- Connections, venting and thermostat
- Labor and permits
Where the money typically goes
As a rough rule of thumb for home systems (HVAC, electrical, plumbing) projects, quotes tend to break down like this — actual splits vary by contractor and scope:
How to get the best price in Seattle
Get 2–3 itemized quotes from licensed, insured local pros and compare the same scope and materials. Ask about off-season timing and bundling related work. The lowest bid isn't always the best value — check reviews, licensing and warranty.
Local factors in Seattle, WA
Seattle's building code layers Washington State's energy code (one of the more stringent in the country) on top of standard permitting, affecting insulation and window specs on larger projects. The city's hillier terrain and higher rainfall also make drainage and retaining-wall considerations more common on exterior and foundation work than in flatter, drier markets.
Frequently asked questions
How much does it cost to replace a furnace in Seattle, WA?
In Seattle, WA, it typically costs $3,600 to $11,500, with an average of about $6,500. Your exact price depends on fuel type (gas, electric, oil) and efficiency (afue) and home size and btu output needed.
What affects the price the most?
The biggest cost drivers are: Fuel type (gas, electric, oil) and efficiency (AFUE); Home size and BTU output needed; Ductwork condition; Brand and install complexity. Getting 2–3 itemized quotes is the best way to see how these apply to your specific project.
What's usually included?
A standard quote to replace a furnace generally includes: New furnace unit; Removal of old unit; Connections, venting and thermostat; Labor and permits. Always confirm what's in (and out of) scope before signing.
How can I save money?
Get multiple quotes, ask about off-season scheduling, bundle related work, and make sure you're comparing the same scope and materials. The cheapest bid isn't always the best value — check licensing, insurance and reviews.
Are these prices exact?
No — they're estimated local ranges for planning, derived from national averages adjusted for Seattle, WA costs. For an exact number, get a free in-person quote from a local pro.