Seattle HVAC costs
HVAC project costs in Seattle, WA run about 18% above the national average. Each range below is our national figure adjusted to local pricing — pick a project for the full breakdown and estimator.
- Central air conditioner replacement in SeattleWhat it costs to replace a central AC condenser and coil, including installation.$4,100 – $14,200
- Ductwork replacement in Seattle$1,650 – $11,200
- Gas furnace replacement in SeattleReplacing a residential gas furnace, unit plus installation.$3,300 – $14,200
- Heat pump installation in SeattleInstalling a whole-home air-source heat pump, ducted or ductless.$7,100 – $23,600
- Mini-split installation in Seattle$2,800 – $17,700
- Water heater replacement in SeattleReplacing a standard tank water heater, gas or electric, installed.$950 – $4,100
Tech-sector wage competition pulls up pay for skilled trades across the metro, and strong, steady demand leaves many contractors with little scheduling downtime. The Seattle Department of Construction and Inspections (SDCI) processes permits online, but timelines vary widely — simple permits often clear in 2–4 weeks, while structural work or an accessory dwelling unit (ADU) can take 3–6 months. Seattle's wet climate makes roofing and decking material choices matter more than in drier regions; composite decking and metal roofing cost more upfront but hold up better against sustained rainfall than wood or standard asphalt. ADU construction is especially active here, driven by the region's housing shortage and comparatively permissive local rules.
Get real quotes for your Seattle HVAC
Our ranges are for planning. The only way to know your real price is itemized quotes from licensed local pros — always get at least three before you hire.
Tip: search for licensed, insured Seattle HVAC contractors in your area, check reviews and references, and compare written itemized bids — not just bottom-line numbers.
See all Seattle costs on the Seattle home costs hub, or compare nationally on the HVAC cost guide.