HVAC System Replacement Cost in Washington

Full HVAC system replacement in Washington costs $11,600 to $25,300 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.

HVAC System Replacement Prices in Washington Cities

City	Estimate	Heating / cooling degree days
Seattle	$12,600 to $27,400	4,482 / 210
Spokane	$9,600 to $20,900	6,018 / 506
Tacoma	$10,000 to $21,800	4,332 / 211
Vancouver	$9,800 to $21,400	4,400 / 399
Bellevue	$12,600 to $27,400	4,482 / 210

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 Replacement Makes Sense

Both the heating and cooling equipment are 15 years old or more
Both units keep needing repairs
Some rooms are uncomfortable, and the energy bills are high
An old R-22 AC paired with an aging furnace

What Moves the Price

Furnace plus AC, or heat pump plus air handler
Efficiency ratings: SEER2, AFUE and HSPF2
Equipment sized to the house and climate
Duct repair or replacement
Thermostat and zoning upgrades
Permits and electrical work

Common Questions

How often should an HVAC system be replaced?

Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.

Can I replace only the AC and keep my furnace?

Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.

Other HVAC Prices in Washington

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