Furnace is 15 years or older and repair calls are becoming frequent
Heating · Greater Seattle
Furnace Replacement in Greater Seattle
Furnace replacement in Greater Seattle typically runs $4,800 to $9,800 depending on system size, ductwork condition, and efficiency rating. SPS Pro Services installs high-efficiency furnaces throughout King and Snohomish counties, matching equipment to your home's square footage and existing duct layout for reliable winter heat.
Licensed, bonded & insured in WashingtonMon–Fri 8am–6pm · 24/7 emergencies
A full furnace replacement includes removing the old unit, adjusting ductwork transitions where needed, setting up the thermostat, and testing gas or electric connections for safe operation. Homeowners across Bellevue, Redmond, Lynnwood, Everett, and the rest of King and Snohomish counties typically replace a furnace when it's 15 to 20 years old, needs frequent repairs, or can't keep up with Western Washington's damp winters. New systems improve efficiency and lower monthly heating costs.
Symptoms we see daily
Signs you need furnace replacement
Uneven heating between rooms or a thermostat that won't hold temperature
Energy bills climbing with no change in how the home is used
Pilot light burns yellow instead of blue, or you notice odd smells when it runs
Banging, rattling, or grinding noises when the furnace starts up
No surprises
How a furnace replacement visit works
1
In-Home Assessment
A technician inspects your current furnace, ductwork, and venting, then measures the home to determine proper sizing.
2
Equipment Selection
You choose between efficiency tiers and fuel types based on your budget, home layout, and whether you're on natural gas or electric service.
3
Old Furnace Removal
The existing unit is disconnected and removed, with gas or electrical lines safely capped or prepped for the new system.
4
New Furnace Installation
The new furnace is set, connected to ductwork and utilities, and the thermostat is wired and configured.
5
Testing and Walkthrough
The system runs through a full heating cycle test, and the technician walks you through operation, filters, and maintenance basics.
Why quotes range from $4,800 to $9,800
These factors decide where your job lands in the range — and we walk you through each one on the written quote.
- Home size and duct condition, since many houses built before 1990 in this region need duct modifications during replacement
- Efficiency rating selected, such as an 80% AFUE unit versus a 96% AFUE high-efficiency model
- Fuel type, including natural gas furnaces on PSE lines versus electric furnace installs common in Snohomish PUD service areas
- Attic or crawlspace access, which can add labor time in older Seattle-area homes with tight mechanical rooms
Flat-rate pricing
Furnace Replacement — what it costs
Conservative ranges for the Seattle metro. Your written quote is exact before work begins.
| Job | Typical price |
|---|---|
| In-home estimateExact flat quote for your home | Free |
| Standard furnace replacementTypical single-system job | $4,800–$6,470 |
| Mid-range furnace replacementHigher-capacity or multi-zone equipment | $6,470–$8,130 |
| Complex furnace replacementPremium equipment or difficult access | $8,130–$9,800 |
Prices reviewed by Sergei Petrov · July 2026. Parts availability can shift ranges — the quote you sign is final.
24/7 Emergency Line
Emergency dispatchNo heat at 11pm? We pick up.
Office hours are Mon–Fri, but the emergency line never closes. Call any hour and we dispatch a licensed tech across Greater Seattle.
Straight answers
Furnace Replacement questions we hear most
How long does a furnace replacement take?
Most residential furnace replacements are completed in a single workday, roughly 4 to 8 hours depending on ductwork changes or venting adjustments needed for the new unit.
Do you install both gas and electric furnaces?
Yes. SPS Pro Services installs natural gas furnaces for homes on PSE gas lines and electric furnaces for homes served by Snohomish PUD or PSE electric, matching the system to your existing utility setup.
What size furnace do I actually need?
Correct sizing comes from a load calculation, not just square footage. Insulation levels, window count, ceiling height, and duct layout all factor in, which is why we assess the home in person before recommending equipment.
Is there a warranty on the installation labor?
Yes, installation labor is covered by a 1-year workmanship warranty. Equipment components are covered separately under the manufacturer's warranty, which typically ranges from 10 to 12 years depending on the unit.
Founder & Lead HVAC Technician, SPS Pro Services
EPA Section 608 UniversalNATE Core Certified14+ years in the trade
Reviews the pricing and service guidance on this page against SPS Pro Services's actual job records across King and Snohomish counties.
Prices reviewed July 2026
Furnace Replacement available in your city
King & Snohomish counties — local pages with city-specific pricing notes.
Need furnace replacement? Get a straight answer today.
Call (206) 427-8907 to schedule an in-home furnace replacement estimate anywhere in King or Snohomish County.