AC Installation Cost in Washington

New AC installation in Washington costs $4,600 to $10,400 in 2026, though city-to-city prices vary quite a bit. Heating drives most HVAC spending in Washington: its larger communities average 4,897 heating and 272 cooling degree days a year.

AC Installation Prices in Washington Cities

From 2020 through 2025, NOAA recorded 830 winter storm and ice events, 204 heat events, 25 extreme cold events and 37 hail reports in Washington. Those are the days when emergency HVAC calls pile up.

When It Makes Sense

• The AC is 12 to 15 years old or more
• It still runs on R-22 refrigerant
• It has had more than one refrigerant leak
• The house can't reach the thermostat setting on hot afternoons
• Summer electric bills keep going up

What Moves the Price

• Tonnage, based on house size and local climate
• SEER2 rating and whether the compressor is single-stage or variable-speed
• Whether the coil and line set also need replacing
• Electrical work such as a new disconnect, breaker or wiring
• The pad, permit and refrigerant (R-410A or the newer R-454B)

Common Questions