You're planning to list next spring. Somewhere between the roof quote and the paint samples, somebody told you the furnace is "original to the house" and now you're getting HVAC quotes you weren't budgeting for.
Here's the honest version, from a company that gets called for exactly this conversation a few times a month across Federal Way, Kent, Puyallup and Olympia: a new heat pump is usually not a money-maker at closing. It's insurance. Whether that insurance is worth buying depends on what's in your mechanical room right now and what the comps in your neighborhood look like.
The default answer is no — with three real exceptions
If your system is 12 years old, heats the house, cools the house, and passed its last tune-up, replacing it before a sale is a luxury, not a strategy. Buyers price working HVAC as an expectation. Nobody writes an offer $15,000 higher because the condenser is shiny.
So the default is: leave it, maintain it, disclose it honestly.
The exceptions are where real money hides.
Exception 1: The system is actually failing
A furnace with a cracked heat exchanger, a heat pump that's lost its compressor, an R-22 system that needs refrigerant nobody makes anymore. These do not stay quiet during a home inspection. They show up in the report in bold, and then they get negotiated — at a number the buyer chooses, under a deadline you don't control.
That is the scenario where replacing first genuinely beats waiting. You buy on your timeline, you compare Good/Better/Best options, and you hand your agent a paid invoice with a 10-year parts and labor warranty attached instead of a credit request.
Exception 2: The home has no cooling and every comp does
Western Washington used to be a no-AC market. It isn't anymore. In a lot of neighborhoods, a listing without cooling now reads as dated to buyers scrolling on their phones, even though the climate is mild. If you're competing against comps that all list "heat pump" or "central AC," adding cooling widens your buyer pool in a way a new water heater never will.
A ducted heat pump covers heating and cooling in one system, which is why it's the usual recommendation here rather than bolting AC onto an aging furnace.
Exception 3: You're not actually leaving for 12–24 months
This one gets underweighted. "Next year" often means fourteen months, two more winters of a furnace that short-cycles, and a summer with fans in every window. If you're living with the system through another heating season, you're not only buying resale protection — you're buying your own comfort, your own lower operating cost, and any rebate money the install qualifies for.
The numbers, plainly
All prices are installed, in standard Puget Sound markets. Affluent and luxury markets (Seattle, Bellevue, Gig Harbor and a handful of others) run higher.
| Path | Installed cost | What a buyer sees |
|---|---|---|
| PathTune-up and disclose | Installed costService cost only | What a buyer seesHonest age, honest condition |
| PathGas furnace replacement | Installed cost$4,000 – $8,000 | What a buyer seesNew heat, no cooling |
| PathFurnace + central AC | Installed cost$10,000 – $16,000 | What a buyer seesHeat and cooling, two units |
| PathDucted heat pump | Installed cost$12,000 – $18,000 | What a buyer seesHeat and cooling, one modern system |
| PathDuctless mini-split | Installed cost$8,000 – $14,000 | What a buyer seesCooling and heat without ductwork |
Compare those against what the inspection is likely to cost you. A failing system rarely gets negotiated at its actual replacement price — it gets negotiated at a number that also covers the buyer's inconvenience and risk. That gap is the whole argument for handling it first.
The rebate question, since you asked
Incentives don't care that you're moving. They're tied to the install and the utility account at the property. Local utility rebates may apply toward a qualifying heat pump when it replaces an existing electric or fossil-fuel system — the amount depends on the system you're replacing, the equipment you install, and which utility bills the address.
Two things to keep straight. The federal 25C tax credit ended December 31, 2025; no 2026 install qualifies. And utility rebate programs pay only through their own contractor networks, with rules that change. We confirm the current requirements before quoting rather than after, and we file the paperwork. If a seller-timeline bid dangles rebate money, ask whether that company can actually file it, because otherwise the rebate quietly evaporates after the check clears.
Rebate rules and eligibility change, so we confirm your current situation rather than promising a number over the phone. More detail lives in our breakdown of heat pump rebates in Washington.
What your agent actually wants from you
Having sat in a lot of these estimates, the items that help a listing are less glamorous than new equipment:
- A permitted install. Washington's seller disclosure asks whether work was done without required permits. Every job we do gets a mechanical permit and an inspection.
- A transferable manufacturer warranty. Registered at install, in the file, with the model and serial numbers.
- Service records. Even two tune-up invoices reads as "maintained" to a buyer's agent.
- Clean, sensible equipment placement. The outdoor unit on a proper pad, not wedged against a fence line or dripping under a gutter.
- Honest age disclosure. "2009 furnace, serviced annually, runs fine" beats vagueness every time.
What we tell sellers on the estimate visit
Sometimes it's "replace it." Sometimes it's "this thing has three good years left, spend your money on the flooring." We'd rather lose the job than sell a system a home doesn't need, and that's not a slogan — it's why we ask what your timeline actually is before we quote anything.
If the system is limping, get it looked at now while you still have options. If it's fine, get it tuned and put the invoice in the listing folder.
Want a ballpark before anyone comes out? The instant estimate tool gives you Good, Better and Best starting prices in about 60 seconds. When you're ready for a real number tied to your actual home, request a free in-home estimate or call (253) 785-4622, Monday through Friday, 8 to 6. We'll tell you what we'd do if it were our house going on the market.