Furnace is 15 years or older and needs frequent repairs
Heating · Seattle, WA
Furnace Installation in Seattle, WA
Most furnace installations in Seattle run $4,800 to $9,800 installed, depending on unit size, fuel type, and ductwork condition. SPS Pro Services installs furnaces throughout Seattle and King County, with most single-furnace jobs completed in one day by a two-person crew.
Typical cost$4,800–$9,800
WarrantyWorkmanship warranty
AvailabilitySame-week visits
HoursMon–Fri 8am–6pm
Seattle homeowners heat with a mix of natural gas and electricity, and the choice affects your monthly bill more than most people expect. Puget Sound Energy (PSE) supplies natural gas citywide and offers rebates on qualifying high-efficiency furnaces, while Seattle City Light's hydro-based electric rates keep electric resistance and heat pump backup costs relatively low compared to other parts of the state. We help you weigh upfront installation cost against realistic monthly operating cost before you sign off on equipment.
Local knowledge
What's different about furnace installation in Seattle
A few things about working in Seattle shape how we quote and schedule this job.
Many Seattle homes in neighborhoods like Ballard, Wallingford, and Rainier Valley were built before 1960, so we often resize or reseal ductwork rather than assume the old furnace's output still matches the house.
PSE gas service covers most of Seattle, and current rebate programs can offset part of the cost of a 95%+ AFUE furnace, which we factor into the quote before you commit to a model.
Seattle's mild, wet winters mean furnaces run fewer hours than in colder climates, so right-sizing the unit matters more here than in Eastern Washington to avoid short-cycling and wasted gas.
Symptoms we see daily
Signs you need furnace installation in Seattle
Uneven heating between rooms or floors
Energy bills rising without a change in usage
Furnace short-cycles, turning on and off repeatedly
Unusual noises, a burning smell, or a yellow pilot flame
No surprises
How a Seattle furnace installation visit works
1
Home and duct assessment
We inspect your existing furnace, ductwork, and gas or electric hookups, and measure your home's square footage to calculate the correct BTU output.
2
Fuel and efficiency comparison
We walk through gas versus electric options and current PSE rebate eligibility so you can compare installed cost against expected monthly utility bills.
3
Written estimate
You get a fixed quote covering equipment, labor, permits, and any duct or venting work, with no surprise add-ons after the crew arrives.
4
Installation day
A licensed crew removes the old unit, sets the new furnace, connects gas or electrical lines, and tests airflow and safety controls, typically within a single day.
5
Startup and walkthrough
We run the system through a full heating cycle, check carbon monoxide and gas line safety, and show you thermostat settings and filter locations before we leave.
Flat-rate pricing
Furnace Installation in Seattle — 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 installationTypical single-system job | $4,800–$6,470 |
| Mid-range furnace installationHigher-capacity or multi-zone equipment | $6,470–$8,130 |
| Complex furnace installationPremium 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 Installation in Seattle — FAQ
Do I need a permit for furnace installation in Seattle?
Yes, the City of Seattle requires a mechanical permit for furnace replacement, and gas line work often needs inspection. We pull the permit as part of the installation and schedule the required inspection so you're not left handling paperwork.
Are there rebates available for a new furnace in Seattle?
PSE periodically offers rebates on qualifying high-efficiency natural gas furnaces for customers in its Seattle service area. Rebate amounts and eligibility change, so we check current offers at the time of your quote rather than promise a fixed number upfront.
Is gas or electric cheaper to run in Seattle?
It depends on your home's insulation and current setup. Seattle City Light's hydro-based electric rates are lower than the national average, which narrows the gap between gas and electric heating costs here compared to other regions, so we run the comparison against your actual usage.
How old is too old for my Seattle furnace?
Most gas furnaces last 15 to 20 years, and many homes in older Seattle neighborhoods still have units installed before 2005. If yours is past 15 years, rising repair frequency and declining efficiency usually make replacement the better financial call.
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 in Seattle and across the Seattle metro.
Prices reviewed July 2026
Also in Seattle
Other services our crew handles on the same routes.
Need furnace installation in Seattle?
Call (206) 427-8907 to get a firm furnace installation quote for your Seattle home, Monday through Friday, 8am to 6pm.