AC Installation Cost in Seattle 2026
AC Installation in Seattle costs between $5,650 and $16,950 in 2026, with the average around $9,887. Seattle pricing runs 41% above the US national average. Installation of a new central air conditioner with matched outdoor condenser and indoor evaporator coil, refrigerant charge, and thermostat. Includes electrical connection and a startup test.
What ac installation includes in Seattle
Installation of a new central air conditioner with matched outdoor condenser and indoor evaporator coil, refrigerant charge, and thermostat. Includes electrical connection and a startup test.
Typical time on site: 1 to 2 days. Local labor rate: $39/hour for an experienced hvac pro.
What changes the price of ac installation in Seattle
- Cooling capacity in tons
- SEER efficiency rating
- Coil and line set condition
- Electrical and pad work
- Removal of old unit
A ac installation quote priced off statewide averages will be off by 10 to 20 percent for Seattle, because the metro has its own labor pool, material delivery distances, and permit timelines.
Seattle climate and demand for hvac
Mild winters with persistent rain (moss/moisture on roofs); rare snow loads; minimal AC historically but warming trend
Seattle permits for ac installation
Building department: Seattle Department of Construction and Inspections (SDCI). https://www.seattle.gov/sdci
Typical permit cost: $400 - $5,000 residential. Inspection time: 10-25 business days; plan check 6-12 weeks. Seattle rule: Seattle SDCI has strict energy code (Stretch Code). Tree ordinance affects site work. ADU streamlined permitting. WA L&I license required for all contractors.
Washington sales tax and licensing for HVAC
Washington sales tax: 6.5% + local (~9.3% combined avg) + 0.471% B&O. WASHINGTON TAXES CONTRACTOR LABOR. Retail Sales Tax applies to total construction contract (labor + materials) on speculative builders. Custom construction taxed differently.
State license: Washington Department of Labor and Industries (L&I), required: $117 (initial) + $12K bond + insurance.
Get accurate AC Installation quotes in Seattle with KaamCam
KaamCam helps Seattle hvac pros send branded estimates by text, take deposits online, and schedule jobs from one app. The estimate templates auto-fill Washington sales tax and Seattle permit fee lines. $12 per user per month. Start a 7-day free trial.