HVAC Services in Seattle, WA

Seattle's mild, wet winters and moderate summers — rarely pushing past 76°F — have historically made it a heating-dominant market, but recent heat waves have rapidly shifted demand. Heat pump adoption is accelerating across the city, and HVAC companies in Seattle are increasingly being called for both installation and cooling system upgrades. With 100 contractors averaging a strong 4.5 stars across nearly 27,000 reviews, Seattle's market is mature and well-established for both heating and the growing cooling workload.

Project costs span from routine maintenance visits to full system replacements near $88,000. Washington requires no statewide HVAC contractor license — compliance falls to local city and county licensing under the Department of Labor and Industries. Confirm your contractor meets Seattle's specific requirements before scheduling any major work.

The best hvac Seattle contractors earn their reputations through fast scheduling and technical knowledge. Greenwood Heating and Home Services and 2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air both hold 4.9-star ratings, with reviewers most often citing prompt response times and professional workmanship. Gene Johnson Plumbing (4.8 stars) also draws consistent praise for clean installations and clear communication throughout the service process.