Furnace/HVAC Replacement Cost in Seattle (2026)
Average cost in Seattle
$6,500 – $20,000
$15 – $18 per sq ft
In Seattle, the average is $11,731 and most projects cost between $6,500 and $20,000, or about $15 – $18 per sq ft. Prices are before tax and based on 14 sources.
Cost Breakdown
ItemizedHigh-efficiency unit, line sets, and components
51%
Installation, removal, and testing (approx. 24-30 hours)
24%
Contractor margin, insurance, and logistics
19%
Seattle SDCI fees and old unit recycling
6%
Sales Tax at 6.5%
📋What's Included
ScopeTypically Includes
- Furnace or AC unit
- Thermostat
- Basic ductwork connections
- Refrigerant
- Labor & installation
- Old unit disposal
Typically Excludes
- Full ductwork replacement
- Zoning systems
- Smart home integration
- Permits & inspections
- Humidifier or air purifier
Based on a standard 2,000 sq ft home with existing ductwork.
🧮Estimate your project
LiveYour estimate in Seattle
Likely range $6,500 – $20,001
- Equipment & Materials51%$5,983
- Labor24%$2,815
- Overhead & Profit19%$2,229
- Permits & Disposal6%$704
Furnace only
$11,731
AC only
$12,823
Furnace + AC
$18,283
Heat pump (full system)
$22,652
Calibrated to 14 researched sources for Seattle. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$10,812
Today
$11,731
Furnace/HVAC Replacement in Seattle is ↑ 8.5% compared to roughly a year ago — about $919 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top HVAC Replace Contractors in Seattle
Verified providersHotWire Furnace, Air Conditioning & Appliance Repair Seattle
10202 5th Ave NE Ste 200, Seattle, WA 98125, USA
261 reviews
Greenwood Heating and Home Services
14027 Interurban Ave S, Tukwila, WA 98168, USA
4,929 reviews
Essential Heating and Air
1520 14th St NW Unit A, Auburn, WA 98001, USA
1,805 reviews
Progressive Comfort Solutions
129 NW 85th St Ste B, Seattle, WA 98117, USA
164 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Seattle labor rates for HVAC trades are approximately 20% higher than the national baseline, with loaded wages averaging $57.50 to $120 per hour. Additionally, strict local energy codes and the city's marine climate require specialized equipment for humidity control and seismic bracing.
A standard heat pump installation typically ranges from $9,000 to $18,000. While the upfront cost is higher than a gas furnace (which averages $4,000 to $8,000), heat pumps provide both heating and cooling and are increasingly preferred due to Seattle's rising summer temperatures.
Starting January 1, 2026, the Seattle Department of Construction and Inspections (SDCI) implemented a 6.5% inflationary increase plus an 18% year-over-year hike for construction permits. Homeowners should budget between $500 and $1,000 for mechanical and electrical permits alone.
Standard estimates usually cover 'like-for-like' unit replacement. If full ductwork replacement is required, it typically adds $15 to $18 per square foot to the project, or a flat increase of $2,000 to $5,000 depending on home size and crawl space accessibility.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 1 months ago. Updates run weekly. All costs in USD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.