Seattle City Light customers: check seattle.gov for current heat pump rebates.
Seattle prices a heat pump against a climate that flatters the machine and a housing stock that complicates the install. The climate half is easy: mild winters, months of cool, damp weather that reward steady low-speed runtime, and summers that finally arrived and made cooling a real line item in a city that spent a century without it. The housing half is where the quotes spread: Ballard boxes and Wallingford foursquares with oil furnaces and half-finished basements, Queen Anne and Capitol Hill stock with no ducts above the first floor, postwar ranches in West Seattle and Wedgwood with electric furnaces, and panels of every vintage. This guide explains what drives the price, walks the levers that move a quote, and ends with the rebate layer that trims the invoice.
The Bands in One Table
Why the Bands Run Wide
Two houses a mile apart land at opposite ends of the same band honestly. A changeout in a Maple Leaf ranch with sound ducts and a modern panel sits near the bottom; the same nominal project in a 1910s Wallingford foursquare with a basement oil furnace, a 100-amp panel, and ducts that stop at the first floor climbs toward the top for reasons a good contractor itemizes rather than buries. The band is not the price; the site visit produces the price, and the load calculation produces the size, per our contractor guide. A quote written without both is a guess wearing a number.
The Ductless Path Through the Older Stock
Seattle's prewar neighborhoods made this one of the country's natural ductless markets: foursquares and craftsman boxes whose heat came from a basement octopus or from radiators, with no duct system worth inheriting upstairs. The honest hybrid is common and often correct: ducted downstairs on the existing runs, a ductless head for the upstairs the ducts never reached, priced as one system.
The Changeout, and What the Old Fuel Changes
An electric furnace swap is the simplest electrically and often the strongest financially, because the operating savings start from resistance-heat bills. A gas furnace swap is the cleanest mechanically. An oil furnace swap, still a real Seattle category, adds the tank: decommissioning or removal belongs in the quote as a named line, not a surprise, and the fuel arithmetic that motivates the whole project lives in our fuel comparison. The oil case also carries the market's single best rebate line, which this page returns to below.
Ducts in the Basement, Water in the Crawlspace
Seattle ductwork mostly runs through basements and crawlspaces rather than attics, which spares it the baked-duct problem and substitutes wet ones: sagging runs, popped connections, insulation that has been drinking crawlspace moisture for decades. The credible contractor measures static pressure before sizing anything and walks the crawlspace rather than assuming it. Undersized returns are endemic in the older stock and quietly ruin the steady low-speed behavior that is this climate's entire performance story. Sealing and a return fix routinely beat spending the same dollars on tonnage.
Whole-Home, Dual Fuel, and the Panel
One question sorts them: what does my panel need, and is it in this number?
The Cooling Line That Did Not Used to Exist
For a century this city treated air conditioning as an eccentricity, and the housing stock shows it. The last several summers ended the argument, and the heat pump ends the gap as a side effect: the same machine that heats the damp season cools the PNW summer, and for most of the older stock this is the first real cooling the house has ever had. That changes the value math in a way sticker-price comparison misses: a furnace replacement buys heat; a heat pump at similar net cost buys heat plus the cooling line, per our cold-weather guide.
What the Rebates Move
A separate state-funded electrification rebate program is already running through local administrators. Sources: https://www.commerce.wa.gov/energy/clean-buildings/energy-incentives/ira-home-energy-rebates/ and https://www.commerce.wa.gov/energy/clean-buildings/energy-incentives/hear/, fetched 2026-10-14. These rebates are applied by the contractor on the invoice, so the filing process belongs in the quote as a written term.
Reading Three Quotes
Run three bidders against this page and the spread tells its own story. The fast, low, paperless bid priced a nameplate copy, not your house, and probably never walked the crawlspace. The high, thorough bid should justify its scope line by line, and a good contractor does. The quote worth signing usually sits where the documents are: load calculation attached, duct findings written down, panel and tank named where they apply, R-454B equipment specified, and the City Light measure stated with the amount and the filing path. Price matters between bids that did the work; between bids that did not, it is noise.
The Short Version
The number that decides fifteen years of comfort is the tonnage from a real load calculation, sized for the damp winter the city actually has and the summers that now count.
Get Your Free Seattle Quote
Start your free quote: two minutes, free, no obligation. Ask Heat Pump Network about installers in Seattle.