AC Installation Cost in Spokane, Washington
Expect to pay $3,700 to $8,400 for new AC installation in Spokane, WA. Most homeowners end up near $6,300, depending on the equipment tier and how much of the old setup can be reused.
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Spokane Weather and HVAC Load
In a normal year, Spokane racks up 6,018 heating and 506 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here. The AC still runs every summer, but it works far fewer hours than the furnace does. A normal year brings 123 nights at or below freezing and 29 days over 90°F. Snowfall averages about 45 inches. On the cooling side, a 2,000 sq ft house here usually needs around 2.5 tons. A tight, well-insulated house may get by with half a ton less.
| Heating degree days / year | 6,018 |
|---|---|
| Cooling degree days / year | 506 |
| Nights at or below 32°F | 123 |
| Days above 90°F | 29 |
| Average low / high | 38.9°F / 60.7°F |
Spokane Housing Stock
The median Spokane home dates to 1961, according to the Census ACS. That makes the typical house about 65 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Spokane has roughly 56,000 owner-occupied homes, or 58.3% of households. The median home value is $326,200, and median household income is $65,745. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 5 hail days and 12 days with damaging thunderstorm winds in Spokane County. The largest hail reported was 2.75 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. Spokane County also had 2 tornado days in that period.
When It Makes Sense
- It has had more than one refrigerant leak
- The AC is 12 to 15 years old or more
- It still runs on R-22 refrigerant
- Summer electric bills keep going up
What Moves the Price
- Electrical work such as a new disconnect, breaker or wiring
- Whether the coil and line set also need replacing
- SEER2 rating and whether the compressor is single-stage or variable-speed
- Tonnage, based on house size and local climate
- The pad, permit and refrigerant (R-410A or the newer R-454B)
We lowered the national figures about 12% for Spokane using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- The new condenser, coil and, if needed, line set
- The electrical disconnect and wiring
- Removing the old condenser and coil
- Startup, an airflow check and warranty registration
- Refrigerant charge and a leak test
Washington Permits, Efficiency Rules and Rebates
Washington falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2. Expect the contractor to pull a mechanical permit for a replacement job in Spokane. If a bidder suggests skipping it, move on. Also ask for a Washington license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Ask for a Manual J calculation. "Same size as the old one" isn't sizing.
- Ask what federal, state or utility incentives apply to the model you're quoted.
- Fall and early spring installs often come with better pricing and shorter waits.
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AC Installation Questions from Spokane Homeowners
How much is new AC installation in Spokane?
Plan on $3,700 to $8,400, with most jobs near $6,300. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule new AC installation in Spokane?
Between late spring and early fall. Spokane averages 123 freezing nights a year, and heating calls spike from November through February.
How long does a new AC last?
With yearly maintenance, 12 to 17 years. Salt air and extreme heat shorten that.
What size AC do I need?
It depends on square footage, insulation, windows and climate. The rough rule is a ton for every 450 to 650 sq ft, but only a Manual J calculation gives you a real number.
AC Installation Near Spokane
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Spokane Felts Field; NOAA Storm Events Database 2020-2025, Spokane County. Prices are our estimates, not contractor quotes. Updated 2026.