How much does a new central AC unit cost in Seattle, WA?

In Seattle, replacement central air conditioning systems average $6,400 – $13,500 for standard 14 to 16 SEER2 systems, and $8,500 to $14,000 for high-efficiency variable-speed inverter units, including licensed contractor labor, equipment removal, and code permits.

What size AC unit is recommended for homes in Seattle?

With summer temperatures reaching 79°F in Seattle, contractors perform a Manual J load calculation. Generally, homes in King County require approximately 1 ton of cooling capacity per 500 to 650 square feet, factoring in ceiling height, attic insulation, and window orientation.

Are there utility rebates for replacing my AC in Seattle?

Yes! Property owners in Seattle serviced by Seattle City Light / PSE can take advantage of Seattle City Light & PSE Heat Pump Conversion up to $2,400, which can be combined with the federal Inflation Reduction Act Section 25C tax credit of up to $2,000 for qualifying heat pumps.

Do AC installations in Seattle require a municipal permit?

Many older Seattle Craftsman homes lack ductwork; ductless mini-split heat pumps are the #1 preferred cooling upgrade. All participating contractors in our network are fully licensed and pull necessary municipal permits to ensure homeowner warranty validity.

📍 Seattle, WA • KING COUNTY

Seattle, WA AC & HVAC Quotes

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🌤️ Seattle Climate & Cooling Profile Pacific Northwest Marine

79°F Summer Peak High

37°F Winter Low

3.5 Mo. Cooling Season

11.8¢/kWh Local Power Rate

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Seattle, WA HVAC Replacement & Repair Cost Breakdown

Actual contractor pricing in Seattle depends on tonnage (2 to 5 tons), ductwork condition, and SEER2 energy rating. Below are current regional cost benchmarks:

CENTRAL AC

Standard Central AC Replacement

$6,400 – $13,500 Turnkey (Unit + Installation + Removal)

14.3 to 16 SEER2 Single or Two-Stage
Ideal for existing ductwork setups
New outdoor condenser & indoor evaporator coil
Full factory 10-year parts warranty

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High-Efficiency Inverter Heat Pump

$7,800 – $13,900 Before up to $2,000 Federal Tax Credit

18 to 20+ SEER2 Variable Speed Inverter
Heating + Cooling in a single energy-saving unit
Qualifies for Seattle City Light / PSE Rebates
Cuts summer electric bills by up to 42%

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AC REPAIR

Emergency AC Repair & Diagnostics

$105 – $200 Diagnostic Fee (Often Waived with Repair)

Capacitor & contactor replacements ($140 – $320)
Freon / R-410A leak detection & recharge
Blower motor & fan assembly service
Same-day emergency response in Seattle

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COMMERCIAL

Commercial AC & Rooftop HVAC

$11,500 – $32,000 3 to 15 Ton Commercial Systems

Rooftop package units (RTU) & split systems
Crane hoisting and curb adapter replacement
Retail, office, restaurant, and warehouse climate
Commercial maintenance agreements available

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Local Neighborhoods & Communities Served in Seattle

Our network of prescreened HVAC contractors provides prompt dispatch, same-day repairs, and turnkey replacements throughout Seattle and across King County, including:

Municipal Permitting & Inspection in Seattle

Many older Seattle Craftsman homes lack ductwork; ductless mini-split heat pumps are the #1 preferred cooling upgrade.

Unlicensed contractors frequently skip required permits, which can void manufacturer warranties and lead to home inspection issues during future property sales. All HVAC contractors matched through Click Quote Save are verified to hold active state licensing and pull required mechanical permits.

Frequently Asked Questions in Seattle

When is the best time to replace an AC in Seattle?

In Seattle, late winter and early spring (February to April) or early fall (October to November) are prime times. HVAC contractors offer off-season promotions and manufacturer equipment clearances before summer heat drives demand and wait times.

How long does an air conditioner typically last in Seattle?

With 3.5 months of annual cooling demand and summer temperatures averaging 79°F, systems in Seattle last approximately 10 to 14 years. Regular annual maintenance and spring tune-ups prolong compressor lifespan.