Best Heat Pump Replacement Companies in Seattle, WA
Heat Pump Replacement in Seattle: sizing + authorization
A replacement or conversion is bid on Manual J load calculation, manufacturer authorization, and matched-system commissioning — oversizing is the #1 cause of comfort complaints. Here is what each of the 5 contractors below publishes: In Washington, HVAC contractors hold an L&I HVAC/R Specialty Contractor license — verify on lni.wa.gov before scheduling.
Top picks
Consistently strong customer feedback (4.9★ from 4,725+ Google reviews).
Google 4.9★ (4,725+)
Consistently strong customer feedback (5.0★ from 1,210+ Google reviews).
Google 5.0★ (1,210+)
Strong customer feedback (4.5★ from 2,240+ Google reviews).
Google 4.5★ (2,240+)
Consistently strong customer feedback (4.9★ from 155+ Google reviews).
Google 4.9★ (155+)
Consistently strong customer feedback (4.8★ from 225+ Google reviews).
Google 4.8★ (225+)
Typical Heat Pump Replacement costs in Seattle, WA (2026)
Last updated
Estimated ranges for Seattle, WA. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Ducted air-source heat pump + air handler, full system (installed) | $9,600–$19,200 |
| Air handler replacement (paired with heat pump) | $1,800–$4,200 |
| Ductwork modification (resize / re-balance per Manual D) | $720–$2,650 |
Why Seattle's damp winters change how you pick a Heat Pump Installation pro
Seattle's long, damp winters and October–April rainy season increase the value of efficient heating and moisture‑resilient installs. When comparing best heat pump installation companies in Seattle, Washington, look for installers experienced with tight, damp homes in Capitol Hill and Ballard. They should size systems for mild summers and occasional freezes.
Which Seattle Heat Pump Installation question do most homeowners ask first?
- Can I replace my gas furnace with a heat pump?
- Yes — a heat pump both heats and cools, so it can fully replace a gas furnace. In colder areas a dual-fuel setup keeps the furnace as backup for the coldest days. Either way, insist on a Manual J load calculation; conversions can need duct resizing or an electrical upgrade.
- When is replacing an old heat pump better than repairing it?
- If it's past 12–15 years, still uses phased-out R-410A refrigerant, needs a compressor, or the repair bill approaches a third of replacement cost, replacing usually wins. A reputable contractor compares both paths before recommending.
- Do Seattle installers need an SDCI permit for heat pump replacement?
- Yes. Replacements that alter equipment, refrigerant lines, or electrical service typically require a permit from the Seattle Department of Construction and Inspections (SDCI). Contractors must also be registered and carry the appropriate L&I trade license before pulling permits. Ask the contractor which permits they will file and confirm SDCI plan intake requirements for the specific scope of work.
- Do older bungalows in Fremont and Ballard need special mounting or drainage solutions for new heat pumps?
- Yes. Older bungalows often require custom mounting, raised platforms, and upgraded condensate routing to prevent water intrusion. Limited yard space can force non‑standard outdoor unit locations. Request a site survey that documents mounting details, noise mitigation, and drainage plans before accepting a final quote.
- Do dual‑fuel conversions require a licensed electrician and separate permits in Seattle?
- Yes. Dual‑fuel conversions that modify electrical panels or add automatic switching devices typically require a licensed electrician and may trigger separate electrical permits. Contractors should document the electrical scope in the SDCI application and list the licensed electrician on permit paperwork. Ask to see the electrician's L&I credentials.
- How do I get a quote from these heat pump installation companies?
- Submit one request on this page and we send it to the vetted heat pump installation pros in Seattle, WA listed here. They send quotes back — no obligation.