HVAC Replacement Cost in Seattle, WA (2026)
Cost breakdown
| Item | Low | High |
|---|---|---|
| AC condenser unit | $2,250 | $4,950 |
| Air handler / furnace | $1,600 | $3,500 |
| Labor & installation | $1,500 | $3,250 |
| Ductwork (if needed) | $600 | $1,300 |
Cost by system size
| system size | Low | High |
|---|---|---|
| 2 ton (up to ~1,200 sq ft) | $5,300 | $9,450 |
| 3 ton (~1,800 sq ft) | $6,500 | $11,200 |
| 4 ton (~2,400 sq ft) | $7,650 | $13,000 |
| 5 ton (~3,000 sq ft) | $8,850 | $15,350 |
Top-rated HVAC pros in Seattle
Vetted local companies serving Seattle, WA. Compare free quotes — no obligation.
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1
Better Air NW
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2
GREENTOP Heating
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3
Green Bear Heating And Air
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4
Goat Heating & Cooling
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5
Ben's Plumbing Heating & Air
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6
Go-Green Heating AC & Electric
Local companies compiled from public sources. Details shown for reference — always verify licensing before hiring.
Estimate your HVAC Replacement cost
A HVAC Replacement in Seattle, WA typically costs between $5,900 and $13,000, with most homeowners paying around $9,450. Costs in Seattle run above the national average, driven by local labor rates and permit fees.
Below is a full cost breakdown, a price comparison by system size, the factors that move the price in Seattle, money-saving tips, and how to hire the right pro. Prices are based on 2025–2026 industry data and updated regularly.
HVAC Replacement in Seattle: local factors that affect your cost
Seattle’s mild, very wet climate means constant moisture and little historical need for air conditioning. Homes traditionally lacked AC, but recent heat waves have driven a boom in heat pumps and cooling retrofits — electrification incentives apply.
A city permit and Washington’s energy code apply to most work. For the best pricing, book roofing for the dry summer window (demand peaks then). A local HVAC contractor who knows Seattle’s conditions and codes will give you the most accurate quote — request a few below to compare.
What's included in the cost
- A new outdoor condenser and indoor air handler or furnace
- Refrigerant, line set, and electrical hookup
- Removal and disposal of the old system
- A new thermostat and permit
- Manufacturer and labor warranty
What affects the price
- System size (tonnage) — bigger homes need more capacity
- SEER2 efficiency rating — higher efficiency costs more upfront
- Ductwork condition — old or leaky ducts add cost
- Brand and length of warranty
How to save on HVAC Replacement in Seattle
- Replace in spring or fall when contractors are less busy
- Choose a right-sized system u2014 bigger is not better
- Claim ENERGY STAR federal tax credits and utility rebates
- Get 3 itemized quotes and ask about financing
Get free quotes for HVAC Replacement
Tell us about the job — local, vetted pros will reach out with real prices. No obligation.
How to hire the right pro
- Confirm the contractor is licensed, bonded, and insured
- Ask for a Manual J load calculation, not a rule-of-thumb size
- Get the SEER2 rating and full warranty terms in writing
- Avoid large upfront deposits
Frequently asked questions
How much does a HVAC Replacement cost in Seattle?
In Seattle, WA, a HVAC Replacement typically costs $5,900 to $13,000 (average about $9,450). Your exact price depends on the specifics below.
Do I need a permit for a HVAC Replacement in Seattle?
A city permit and Washington's energy code apply to most work. A licensed local contractor should pull the permit and handle inspections as part of the job.
Cost figures are based on 2025–2026 industry data (HomeGuide, Angi) and adjusted for local labor rates. Actual prices vary by project — get free local quotes for an exact figure.