AC Installation Cost in Bellevue, Washington
New AC installation in Bellevue runs about $8,600 for a typical job. Basic installs start near $5,100. High-efficiency equipment with duct or electrical work can reach $11,500.
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Bellevue Weather and HVAC Load
In a normal year, Bellevue racks up 4,482 heating and 210 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. Count on roughly 25 nights below 32°F and 2 afternoons past 90°F in a typical year. Snowfall averages about 4 inches.
| Heating degree days / year | 4,482 |
|---|---|
| Cooling degree days / year | 210 |
| Nights at or below 32°F | 25 |
| Days above 90°F | 2 |
| Average low / high | 45.7°F / 60.8°F |
Bellevue Housing Stock
Census figures put the median build year in Bellevue at 1981, so a typical house here has about 45 years on it. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 51.9% of occupied homes, roughly 32,000 households. With a median household income of $161,300 and a median home value of $1,203,100, local labor rates come out above the national middle in our model.
NOAA's Storm Events Database shows no hail or damaging-wind days for King County from 2020 through 2025, so storm damage to outdoor units is rare here.
When It Makes Sense
- Summer electric bills keep going up
- The AC is 12 to 15 years old or more
- The house can't reach the thermostat setting on hot afternoons
- It has had more than one refrigerant leak
What Moves the Price
- Whether the coil and line set also need replacing
- Electrical work such as a new disconnect, breaker or wiring
- 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)
For Bellevue we raised the national figures about 21%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
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 Bellevue. 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.
- Buy the condenser and coil as a matched set, or you may void the manufacturer warranty.
- Fall and early spring installs often come with better pricing and shorter waits.
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AC Installation Questions from Bellevue Homeowners
How much is new AC installation in Bellevue?
Plan on $5,100 to $11,500, with most jobs near $8,600. 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 Bellevue?
Between late spring and early fall. Bellevue averages 25 freezing nights a year, and heating calls spike from November through February.
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.
How long does a new AC last?
With yearly maintenance, 12 to 17 years. Salt air and extreme heat shorten that.
AC Installation Near Bellevue
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Seattle Sand Point Wsfo; NOAA Storm Events Database 2020-2025, King County. Prices are our estimates, not contractor quotes. Updated 2026.