531 HVAC Service Contractors in Seattle, WA

Seattle's hvac-service market has expanded significantly over the past three years as AC adoption has accelerated alongside the city's growth. With 97 contractors, a 4.5-star average across 26,685 reviews, and 17 providers offering 24/7 coverage, Seattle now has the contractor depth to support same-day service in most situations. Heat pump specialists have become a significant portion of the market given regional preference for all-electric systems.

Service call diagnostics run $81-$216. Routine tune-ups average $76-$216 per system, while standard repairs land at $162-$1,296 depending on scope. Washington has no statewide HVAC license — local and municipal requirements apply through Washington State Department of Labor & Industries, and jurisdiction-specific credentials vary across the metro area.

Greenwood Heating and Home Services (4.9 stars) leads in review count and consistently earns praise for fast response and professional workmanship. 2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air (4.9 stars) is noted for prompt scheduling across a broad range of services. Gene Johnson Plumbing (4.8 stars) earns strong marks for quick turnarounds and technical reliability — qualities customers return to mention in repeat-service reviews.