Heat pump installation cost in Seattle (2026):
prices, rebates and what changed
HOW MUCH DOES HEAT PUMP INSTALLATION COST IN SEATTLE?
A heat pump in Seattle typically costs $6,667 to $13,852 installed, with an average of $10,218 (Angi, July 2026). A single-room ductless unit can cost $2,000 to $4,000, while a whole-house ducted system can reach $25,000 or more (HomeGuide). Seattle rebates can take $300 to $6,000 off, but the federal tax credit ended for systems installed after 2025.
One system for heating and cooling
A heat pump moves heat instead of making it. In winter it pulls heat from the outdoor air and moves it inside; in summer it works in reverse and cools the house. There are two main ways to install one, and they're priced very differently.
| Ductless (mini-split) | Ducted (central) | |
|---|---|---|
| Heats and cools | One room per indoor unit ("zone") | The whole house through ducts |
| Good fit | Homes without ducts, additions, single rooms (HomeGuide) | Homes with ductwork in good shape |
| Installed cost (HomeGuide) | $2,000–$17,000+ | $10,000–$25,000+ |
Heat pump cost by home size in Seattle
Angi sizes heat pumps at about one ton of capacity per 500 sq ft and puts the median Seattle home at 1,890 sq ft, which needs about 2.5 to 3 tons.
| Home size | Capacity | Seattle (Angi) | U.S. (HomeGuide) |
|---|---|---|---|
| 1,000 sq ft | 2 tons | $3,160–$9,240 | $6,000–$8,500+ |
| 1,500 sq ft | 2.5 tons | $5,560–$11,550 | $8,000–$10,500+ |
| 2,000 sq ft | 3 tons | $6,670–$13,850 | $10,000–$20,000+ |
| 2,500 sq ft | 3.5 tons | $7,780–$16,160 | $12,000–$22,000+ |
| 3,000 sq ft | 4 tons | $8,890–$18,470 | $18,000–$25,000+ |
The two guides disagree most for larger homes. A contractor should size your system with a load calculation; HomeGuide suggests asking whether they will do a "Manual J" calculation.
Ductless (mini-split) cost by number of zones
| Indoor units (zones) | Installed cost (HomeGuide) |
|---|---|
| 1 zone | $2,000–$4,000 |
| 2 zones | $3,000–$8,000 |
| 3 zones | $7,000–$11,000 |
| 4 zones | $9,000–$14,000 |
| 5 zones | $11,000–$17,000 |
Seattle heat pump rebates
| Program | Amount | Who qualifies |
|---|---|---|
| Seattle City Light, air-source heat pump | $300, $400 or $600 | City Light customers. Instant discount through participating distributors, based on efficiency (SEER2 / HSPF2). DIY installs don't qualify. |
| Seattle Clean Heat, oil to heat pump | $2,000 | Seattle households heating with oil. Instant rebate on the invoice from a participating contractor. |
| Clean Heat bonus | + $4,000 (up to $6,000 total) | Moderate-income households at 81%–150% of area median income, for installs completed by May 30, 2027. |
| Office of Housing, oil to heat pump | No-cost conversion | Income-eligible Seattle households below the bonus income range. |
Example: switching from oil heat
| Step | Amount |
|---|---|
| Seattle average heat pump installation (Angi) | $10,218 |
| Sales tax at 10.55% | + $1,078 |
| Clean Heat instant rebate | − $2,000 |
| Net with the standard rebate | $9,296 |
| Bonus rebate, if income-qualified | − $4,000 |
| Net with the bonus | $5,296 |
The federal tax credit has ended
Many cost guides, including HomeGuide's, still mention a federal tax credit of 30% up to $2,000 for heat pumps. According to the IRS, that credit (the Energy Efficient Home Improvement Credit) is allowed for qualifying property placed in service "before December 31, 2025." A heat pump installed in 2026 doesn't qualify. If a contractor's quote counts on this credit, ask them to remove it.
Extra costs to ask about
| Item | Cost | Source |
|---|---|---|
| Electrical panel upgrade | $1,800–$2,500 | HomeGuide |
| New dedicated circuit | $250–$900 | HomeGuide |
| Ductwork replacement (Seattle) | $620–$2,100 | Angi Seattle |
| New ductwork | $40–$65 per linear foot | HomeGuide |
| Air handler replacement | $1,500–$3,400+ | HomeGuide |
| Concrete pad for the outdoor unit | $300–$500 | HomeGuide |
| Removing old equipment | $200–$500 | HomeGuide |
| Smart thermostat | $200–$500 | HomeGuide |
| Seattle permit | about $130 | Angi Seattle (SDCI mechanical and refrigeration fees) |
- Washington contractors collect sales tax "on the gross contract price," labor included (Department of Revenue). Seattle's rate is 10.55% since January 1, 2026.
- Look the installer up on L&I's Verify a Contractor tool: active license, bond, insurance and past violations.
- For jobs of $1,000 or more on a home, the contractor must give you a written disclosure statement before work starts (RCW 18.27.114).
- Compare capacity (tons), efficiency (SEER2 and HSPF2), number of zones and warranty on every quote. City Light's rebate depends on the efficiency rating.
HomeGuide lists a typical heat pump lifespan of 10 to 15 years, or 15 to 20 with regular maintenance.
Frequently asked questions
How much does heat pump installation cost in Seattle?
Angi puts the typical Seattle range at $6,667 to $13,852, with an average of $10,218 (July 2026). A single-zone ductless unit can cost $2,000 to $4,000, and a whole-house ducted system $10,000 to $25,000 or more (HomeGuide).
What heat pump rebates are available in Seattle?
Seattle City Light offers $300 to $600 instant discounts on qualifying air-source heat pumps. Households switching from oil heat can get a $2,000 Clean Heat rebate, plus a $4,000 bonus for moderate-income households on installs completed by May 30, 2027. Income-eligible households may qualify for a no-cost conversion.
Is there still a federal tax credit for heat pumps?
No, not for new installs. The IRS says the Energy Efficient Home Improvement Credit applies to property placed in service before December 31, 2025.
How much does a ductless mini-split cost?
HomeGuide lists $2,000 to $4,000 for one zone, $3,000 to $8,000 for two zones and up to $17,000 for five zones, installed.
What size heat pump does a Seattle home need?
Angi uses about one ton per 500 square feet, so the median Seattle home of 1,890 sq ft needs about 2.5 to 3 tons. A contractor's load calculation gives the real answer.
Sources
- Angi — How Much Does a Heat Pump Cost in Seattle, WA? (updated Jul 8, 2026)
- HomeGuide — How Much Does a Heat Pump Cost? (October 30, 2025)
- HomeGuide — How Much Does a Ductless Heat Pump Cost?
- Seattle City Light — Home Energy Solutions
- Seattle Office of Sustainability & Environment — Seattle's Clean Heat Program
- IRS — Energy Efficient Home Improvement Credit
- Washington Department of Revenue — Custom construction and Seattle rate change, January 1, 2026
- Washington State Legislature — RCW 18.27.114 and L&I — Hiring a contractor
All sources accessed October 8, 2026. Rebate programs change often; check the program pages before you sign.
These figures are estimates compiled from the published sources above. They are not quotes and can't account for your home or your contractor. Rebate, tax and permit rules can change, so confirm them with the program, your contractor and the city. This is not tax advice. Get written estimates from licensed, bonded and insured contractors before deciding. See our disclosure and disclaimer.