Furnace Replacement Cost in Seattle: 2026 Pricing & Rebate Guide
Direct Answer
Furnace replacement in Seattle typically costs $4,800 to $8,600 installed, with most homeowners paying around $6,700, roughly 24% above the national average because of higher local labor. Your price depends on furnace size, efficiency (AFUE), fuel type, and ductwork. Beware quotes that blend in full-system HVAC work. [1]
TL;DR
- A furnace-only replacement in Seattle runs about $4,800 to $8,600 installed, with most homeowners near $6,700. Ignore both the $1,500 lowballs and the $12,000-plus “averages,” which measure different jobs. [1][4][5]
- Your price is driven by sizing (Manual J), efficiency (AFUE), fuel type, ductwork, and Seattle’s labor rates. [2]
- Electric furnaces are cheapest to install, gas is cheaper to run, and a heat pump costs most upfront but runs cheapest, often the best long-term fit for Seattle. [5][7]
- Washington did not ban gas furnaces. A like-for-like replacement in an existing home is allowed; the heat-pump push is mostly for new construction. [9][10][13]
- The federal 25C tax credit expired December 31, 2025. In 2026, savings come from PSE rebates, Washington’s HEAR program, and financing, most of which favor heat pumps. [14][8]
- A legitimate quote is itemized: load calculation, exact equipment, permit, removal, and warranty. Get two or three.
One-liner: In Seattle, a furnace replacement usually runs $4,800 to $8,600 installed, and the smart money goes to the homeowner who compares itemized quotes and knows the local rules.
Key Numbers
| Figure | Value | Source |
|---|---|---|
| Typical installed cost | $4,800 to $8,600 | Costadia, 2026 [1] |
| Most homeowners pay | ~$6,700 | Costadia, 2026 [1] |
| Vs. national average | ~24% higher | Costadia, 2026 [1] |
| Labor share of a Seattle install | 20% to 30% | Angi, 2026 [2] |
| Seattle or King County permit | $150 to $600 | HVAC Project Cost, 2026 [6] |
| Furnace repair average (Seattle) | $341 ($139 to $544) | Angi, 2026 [16] |
| Federal 25C credit | Expired Dec 31, 2025 | OBBBA / AC Direct, 2026 [14] |
| 2021 WSEC effective date | March 15, 2024 | King County [11] |
| Heat-pump efficiency | 2 to 4 times gas or electric resistance | WA SBCC [7] |
| PSE heat-pump rebate | $500 to $1,500 (more if income-qualified) | Home Energy Basics, 2026 [8] |
| Gas furnace lifespan | 15 to 20 years | Industry standard |
What a furnace replacement costs in Seattle
In short: A furnace-only replacement in Seattle typically runs about $4,800 to $8,600 installed, with most homeowners landing near $6,700. That’s roughly 24% above the national average, and Seattle’s higher labor rates are the main reason. [1]
Search for a price and you’ll see numbers that can’t both be true. One site lists Seattle furnace replacement at around $1,472. [5] Another pegs the “average” at $11,730 and stretches the range to $20,000. [4] Both are measuring something other than what most people mean by replacing a furnace.
The low figure is equipment and a few hours of labor, with no permit, no removal of the old unit, and no real installation. [5] The high figure quietly folds in full-system projects: new ductwork, dual-fuel setups, and ductless mini-splits for older homes where adding ductwork is difficult. [4] Those aren’t furnace swaps. Strip them out and a straight furnace-only replacement in the Seattle area settles into a tighter band of about $4,800 to $8,600, with a typical job near $6,700. [1] A local Puget Sound installer quotes a similar spread of $4,000 to $8,000. [3]
An example makes it concrete. An average Seattle home needs a furnace of about 56,700 to 113,400 BTUs. [2] A mid-efficiency 95% AFUE gas furnace for a home that size usually installs for somewhere around $6,000 to $7,000. Your number moves from there based on the unit you pick and how involved the install is, which the next section breaks down.
When a quote says “installed,” confirm it covers the whole job:
- The furnace unit itself
- Labor and installation
- Removal and disposal of the old furnace
- The local permit, since a Seattle or King County HVAC permit is required even for a like-for-like swap [6]
- System startup and a safety check
That last part matters when you compare bids. A number that leaves out the permit or haul-away isn’t lower, it’s incomplete.
Furnace replacement cost by home size
Bigger homes need more heating capacity, measured in BTUs, and capacity drives cost. The installed ranges below are regional estimates; your Manual J load calculation, covered next, sets the real target for your house.
| Home size | Furnace size (BTU) | Typical installed range |
|---|---|---|
| 1,000 sq ft | ~45,000 | $3,600 to $6,450 |
| 1,500 sq ft | 45,000 to 90,000 | $4,200 to $7,400 |
| 2,000 sq ft | 56,700 to 113,400 | $4,800 to $8,600 |
| 2,500 sq ft | 75,000 to 150,000 | $5,500 to $9,800 |
| 3,000 sq ft | 90,000 to 180,000 | $6,200 to $10,950 |
BTU sizing follows standard Seattle capacity guidance [2]; dollar ranges are regional estimates anchored to 2026 Seattle-area data and scale with unit efficiency. [1] Exact per-size pricing is pending Essential Heating and Air’s current rates. For a firm number tied to your home, call (253) 576-7251.
Beyond the base install, a few line items can appear depending on your home. You won’t hit all of them; access, hidden damage, and venting decide which apply. [1]
- Old furnace removal and disposal: $50 to $330
- New ductwork, versus a repair at $300 to $1,500: $1,000 to $5,000
- Gas line run or upgrade: $250 to $800
- Chimney liner for high-efficiency venting: $600 to $2,500
- Smart thermostat: $150 to $500
What drives your furnace price up or down
In short: Four things move your price most: the size your home actually needs, the efficiency tier you choose, the condition of your existing ductwork, and Seattle’s labor rates. Get these straight and a high quote often turns out to be the honest one.
Labor alone is a big share of the total. On a typical Seattle furnace install, labor accounts for about 20% to 30% of the project cost. [2] That’s before a single equipment upgrade, and it’s why the same furnace can cost more to install here than in a lower-wage market.
Sizing, done right. The correct furnace size comes from a Manual J load calculation, the industry-standard method for measuring a home’s heat loss room by room. It accounts for insulation, windows, air leakage, and layout, not floor area alone. Skip it and a contractor guesses, usually by oversizing. An oversized furnace costs more up front and then short cycles, switching on and off in quick bursts that wear the equipment and leave rooms unevenly heated. A right-sized unit is often a cheaper unit that works better. Ask whether the quote includes a load calculation. A sound furnace replacement in Seattle starts with that step.
Efficiency tier (AFUE). AFUE measures how much of the fuel a furnace turns into heat. Higher AFUE costs more up front and less every month. In the Pacific Northwest, condensing furnaces at 90% AFUE and above are the practical standard.
| AFUE tier | What it means | Typical installed range |
|---|---|---|
| 80% | Standard efficiency, single-stage | $3,800 to $6,800 |
| 90% to 95% | Condensing, often two-stage | $4,800 to $8,600 |
| 96% and up | High-efficiency, modulating | $6,200 to $11,550 |
Dollar ranges reflect Seattle-area 2026 estimates. [1] A modulating furnace adjusts its output in fine steps instead of running at full power and shutting off, which smooths temperature swings and cuts noise. You pay for that at install and recover part of it over the life of the unit.
A quick myth to retire while we’re on efficiency: you may read that gas furnaces must already be 95% AFUE. That’s a future federal rule, not a current one. The U.S. Department of Energy standard raising the minimum to 95% AFUE for non-weatherized gas furnaces applies to units manufactured on or after December 18, 2028, up from today’s 80% minimum. [17] It goes by manufacture date, with no installation deadline, so it does not force you to replace a working furnace. For a 2026 Seattle replacement, condensing units at 90% and up are the practical norm, but 80% units remain legal to install. [17]
Ductwork. Your old furnace’s ducts may need repair, resizing, or sealing to match a newer, more efficient unit. Leaky or undersized ducts waste the efficiency you paid for, so a thorough bid may include duct work that a cheaper bid quietly skips.
Picture two quotes on the same 1,900 square foot house. One is $5,600 for an 80% single-stage swap. The other is $7,800 for a 95% two-stage unit with duct sealing and a new return. The second looks worse until you notice it fixes the airflow problem that made the old system struggle. Cheaper on paper isn’t always cheaper to live with.
Permits and inspection. These aren’t optional. A Seattle or King County HVAC permit and inspection run roughly $150 to $600 and belong in every legitimate quote. [6]
Gas vs. electric furnace, and where a heat pump fits
In short: An electric furnace is cheaper to install, a gas furnace is usually cheaper to run, and a heat pump costs the most up front but runs the cheapest of all. In Seattle’s mild climate, the heat pump is often the smartest long-term pick.
Fuel choice is the decision that follows you for the next 15 years, because it sets your monthly bill, not only your install price.
Start with upfront cost. An electric furnace is the cheapest to install. The unit runs roughly $400 to $1,200, with installation from about $1,600 to $2,400. A gas furnace costs more to put in, with the unit around $600 to $1,400 and installation closer to $1,800 to $4,000. [5] In Seattle dollars, a standard gas furnace installs for about $4,650 to $8,450, a high-efficiency gas unit for a similar range, and an electric furnace for $2,650 to $5,600. [1] So far electric looks like the bargain. Then the power bill arrives.
An electric furnace makes heat with resistance coils, the most expensive way to warm a home. A gas furnace produces more heat per dollar in most months. A heat pump beats both, because it moves heat from the outside air instead of burning fuel or running coils. Heat pumps are cited as two to four times more efficient than gas, oil, or electric-resistance heating. [7] That efficiency is why they cost the most to install and the least to operate.
| Option | Upfront cost | Operating cost | Typical lifespan | Best for |
|---|---|---|---|---|
| Electric furnace | Lowest | Highest | 20 to 30 years | Low install budget, backup heat, mild use |
| Gas furnace | Moderate | Moderate | 15 to 20 years | Dependable heat in cold snaps, existing gas line |
| Heat pump | Highest | Lowest | 12 to 15 years | Year-round efficiency, cooling included, Seattle’s climate |
Seattle’s climate tips the math toward the heat pump. Winters here are mild and rarely brutal, the exact condition a heat pump handles best, and the same unit cools your home in the increasingly warm summers. For the occasional hard freeze, a dual-fuel setup pairs a heat pump with a gas furnace that kicks in only when temperatures drop far enough to need it. You get heat-pump efficiency most of the year and gas backup for the coldest days.
There’s a money angle too. Rebates in Washington lean heavily toward heat pumps, which narrows the upfront gap. We cover the specific programs, including Puget Sound Energy rebates, in the rebates section below. [8]
None of this makes gas the wrong call. If you have a working gas line, want reliable heat through a cold snap, and prefer a lower install bill than a heat pump, a high-efficiency gas furnace is a solid, common choice in Seattle. The point is to compare lifetime cost, not the sticker alone.
Does Washington’s energy code force you off gas?
In short: No. Despite the headlines, Washington did not ban gas furnaces or require heat pumps in most homes. If your gas furnace fails, you can replace it with another gas furnace. The heat-pump push applies mainly to new construction, and even there it’s a performance target, not a ban. [9][13]
You’ve probably seen the story: Washington is outlawing gas, and your next furnace has to be a heat pump. It made for an alarming headline. It’s also not what the enacted code says.
Here’s what happened. In 2023 the state moved to require heat pumps in new residential construction, and that version was scaled back before it took effect. The final 2021 Washington State Energy Code removed the heat-pump requirement for space and water heating and replaced it with a higher-efficiency credit system that lets builders choose their equipment. [9] The code took effect March 15, 2024. [11] Reporting at the time was blunt about the reversal: the approved codes no longer mandate electric heat pumps in most new residential and commercial buildings, requiring higher efficiency without explicitly mandating them. [10] A federal court decision against a city gas ban in Berkeley, California, pushed states toward performance targets rather than outright fuel bans. [10]
That’s new construction. Your existing home is governed by different rules, and they’re friendlier than the headlines suggest.
Under the residential code, unaltered portions of an existing home aren’t required to be brought up to current code. [12] When a furnace fails, you can replace it with the same type of equipment so the heat comes back on quickly. Seattle’s own code guidance spells this out: the exception permits like-for-like replacement of a single boiler, furnace, or heat pump where no other HVAC work is planned, so a failed appliance can be replaced without redesigning the whole system. [13]
Two practical points:
- Efficiency floor. Your replacement furnace has to meet the federal minimum efficiency for its type. [12] In practice, condensing gas furnaces at 90% AFUE and up are standard in the Seattle market anyway.
- The one real trigger. A straight swap is simple. Things change if you significantly increase heating capacity or add air conditioning to a space that never had it, which can pull extra efficiency requirements into the job. If that’s your plan, raise it with your installer up front.
Bottom line: replacing your gas furnace in Seattle is allowed in 2026. The heat-pump pressure lives in new construction, not in your like-for-like swap.
Rebates and incentives that still exist in 2026
In short: The federal tax credit that used to offset HVAC costs expired at the end of 2025. In 2026, your savings come from Puget Sound Energy rebates, Washington’s income-qualified rebate program, and financing. Most rebate money is aimed at heat pumps, not gas furnaces. [14][8]
Let’s clear up the biggest piece of outdated advice first. Plenty of cost pages still tell you to claim a federal tax credit. That door closed. The federal 25C Energy Efficient Home Improvement Credit expired on December 31, 2025, under the One Big Beautiful Bill Act, and equipment placed in service in 2026 doesn’t qualify. [14] When it existed, it capped furnace credits at $1,200 a year and heat pump credits at $2,000. [15] If you installed in 2025, you can still claim it on your 2025 return, but that’s the last of it.
So what’s left? Three real levers.
Puget Sound Energy rebates. PSE offers rebates for qualifying heat pumps, roughly $500 to $1,500 for an air-source heat pump depending on the program and your existing system, with higher amounts for income-qualified households, plus about $250 to $800 for ductless mini-splits. [8][6] Amounts change, so confirm the current offer before you buy.
Washington’s HEAR program. The state runs an income-qualified rebate program funded by the Climate Commitment Act for households at or below 150% of area median income. [8] It covers heat pumps and related upgrades, applied through approved local administrators.
Financing. For a gas furnace replacement, rebates rarely apply, so the practical lever is spreading the cost over time. Essential Heating and Air offers financing options that turn a lump-sum replacement into a manageable monthly payment.
One honest note so you can plan: nearly all of this incentive money is built to move people toward heat pumps. A like-for-like gas furnace swap usually qualifies for little to nothing. That doesn’t make gas the wrong choice, but if rebates matter to your budget, they’re a real point in the heat pump’s favor, worth weighing against the higher install price covered earlier.
How to read a furnace quote and avoid overpaying
In short: A legitimate furnace quote is itemized and specific. It names the exact equipment, includes a load calculation, and lists the permit, removal, and warranty. Vague, round-number bids are where people overpay.
The best protection against a bad price is knowing what a complete quote looks like. Line a few up side by side and the honest one usually stands out.
What a real quote includes:
- A Manual J load calculation, or clear evidence your home was measured, not eyeballed. If a contractor sizes your furnace off square footage alone, that’s a shortcut that leads to an oversized, short-cycling unit.
- The exact equipment: make, model, AFUE rating, and staging (single-stage, two-stage, or modulating). “A new furnace” isn’t a spec.
- Itemized labor, not a single lump sum.
- The permit and inspection.
- Removal and disposal of the old furnace.
- System startup and a safety and combustion check.
- Written warranty terms for both parts and labor.
Red flags worth a pause:
- No load calculation offered.
- A verbal estimate with nothing in writing.
- The permit is missing or described as unnecessary. It isn’t.
- A big jump in furnace capacity with no reason given.
- High-pressure, today-only pricing. A fair price is still fair next week.
One more thing on pricing: a “free estimate” is a sales visit, not a discount. A diagnostic or service-call fee usually runs $75 to $150, and a $79 to $129 seasonal tune-up promo is marketing, not the installed price. [1] Keep teaser numbers separate from the real installed cost.
Two more things save real money.
Check the warranty carefully. Equipment often carries a 10-year parts warranty, but only if you register it, and labor coverage is separate. A quote that spells out both is one you can trust. Ask who handles a warranty claim two years from now.
Verify the license. Washington requires HVAC contractors to hold an active state license. [6] Verifying it takes a minute and screens out the riskiest bids.
Finally, get two or three quotes. Not to chase the lowest number, but to see the range and understand what each contractor actually includes. When you schedule a furnace replacement quote with Essential Heating and Air, you get an itemized bid you can compare line by line against any other.
Repair or replace? A quick gut check
In short: If your furnace is under about 12 years old and the repair is minor, fix it. If it’s 15 or older, breaking down often, or the repair quote is steep, replacement is usually the better money. Any carbon monoxide risk settles the question immediately: replace.
Not every furnace problem is a replacement. Here’s a fast way to decide.
Start with a simple math check. Multiply the furnace’s age by the repair quote. If the result clears roughly $5,000, replacement tends to win. A 16-year-old furnace with a $400 repair is on the edge; the same repair on a 6-year-old unit is an easy fix.
For scale, a furnace repair in Seattle averages about $341, with most homeowners spending between $139 and $544. [16] A repair in that range on a newer unit is worth doing. The same money sunk into a furnace near the end of its 15-to-20-year life is often wasted.
Lean toward replacement when you see:
- The furnace is 15 years or older
- Energy bills keep climbing with no other explanation
- You’ve called for repairs more than once in the past couple of years
- Some rooms never get comfortable no matter the thermostat setting
- Banging, rattling, or screeching on startup
- A yellow or flickering burner flame instead of a steady blue one, which you should have checked right away
- More dust or a stale smell when the heat runs
One factor overrides the math. If a technician finds a cracked heat exchanger, or you have any carbon monoxide concern, stop weighing costs and replace the unit. That’s a safety issue, not a budget one.
If the gut check points to replacement, the next step is an itemized quote for your home. Call Essential Heating and Air at (253) 576-7251 to get one.
Frequently Asked Questions
How much does furnace replacement cost in Seattle?
A furnace-only replacement typically runs $4,800 to $8,600 installed, with most homeowners paying around $6,700. That’s about 24% above the national average, mainly because of higher local labor rates.
Is a gas or electric furnace cheaper?
An electric furnace is cheaper to install, but a gas furnace is usually cheaper to run. A heat pump costs the most upfront and the least to operate, which often makes it the best long-term value in Seattle’s climate.
Is there a furnace tax credit in 2026?
No. The federal 25C Energy Efficient Home Improvement Credit expired December 31, 2025, and equipment installed in 2026 doesn’t qualify. Washington utility and state rebates may still help, mostly for heat pumps.
Does Washington require heat pumps instead of gas furnaces?
Not for existing homes. You can replace a failed gas furnace with another gas furnace. The heat-pump push applies mainly to new construction, and even there the code sets an efficiency target rather than banning gas.
Do I need a permit to replace a furnace in Seattle?
Yes. A Seattle or King County HVAC permit is required even for a like-for-like replacement, typically costing $150 to $600, and it should be included in your quote.
How long does a furnace replacement take?
A straightforward like-for-like swap usually takes most of a single day. Jobs that involve ductwork changes, a fuel switch, or added cooling can take longer.
Should I repair or replace my furnace?
Repair a newer furnace with a minor issue. Replace one that’s 15 years or older, breaks down often, or whose repair cost times its age clears roughly $5,000. Any carbon monoxide concern means replace it.
When is the best time to replace a furnace?
Spring through late summer, before the winter rush, usually means better scheduling and pricing than an emergency replacement during a cold snap.
Definition Bank
| Term | Plain-English definition |
|---|---|
| AFUE | Annual Fuel Utilization Efficiency, the percent of fuel a furnace turns into usable heat. |
| BTU | British Thermal Unit, a measure of heating capacity. Bigger homes need more BTUs. |
| Manual J | The industry-standard calculation that sizes a furnace by measuring a home’s heat loss room by room. |
| Single-stage furnace | Runs at one output level, full power or off. |
| Two-stage furnace | Runs at high or low output for steadier temperatures. |
| Modulating furnace | Adjusts output in fine increments for the most even, quiet heat. |
| Condensing furnace | A high-efficiency furnace (90% AFUE and up) that pulls extra heat from exhaust gases. |
| Electric resistance heating | Heat made by running electricity through coils, simple but costly to run. |
| Air-source heat pump | A system that moves heat from outdoor air to warm or cool a home, using far less energy than combustion. |
| Dual-fuel system | A heat pump paired with a gas furnace that takes over in the coldest weather. |
| WSEC | Washington State Energy Code, the state’s building energy rules. |
| 25C credit | The former federal Energy Efficient Home Improvement Credit, expired December 31, 2025. |
| HEAR program | Washington’s income-qualified rebate program for heat pumps and related upgrades. |
| Like-for-like replacement | Swapping a failed furnace for the same type of equipment, allowed for existing homes. |
Entity Cards
Gas furnace replacement (Seattle)
| Property | Value |
|---|---|
| Typical installed cost | $4,800 to $8,600 (most ~$6,700) |
| Typical lifespan | 15 to 20 years |
| Efficiency norm here | 90% AFUE and up (condensing) |
| Permit | Required, $150 to $600 |
| 2026 rebate posture | Little to none |
Air-source heat pump
| Property | Value |
|---|---|
| Cost posture | Highest upfront, lowest to run |
| Efficiency | 2 to 4 times gas or electric resistance |
| Rebate eligibility | PSE plus Washington HEAR (income-qualified) |
| Climate fit | Excellent for Seattle’s mild winters; adds cooling |
| Typical lifespan | 12 to 15 years |
Washington State Energy Code (2021 WSEC)
| Property | Value |
|---|---|
| Effective date | March 15, 2024 |
| New construction | Higher-efficiency credit system; no gas ban, no heat-pump mandate in most homes |
| Existing-home replacement | Like-for-like furnace swap allowed; must meet federal minimum efficiency |
| Trigger for extra rules | Large capacity increase or adding cooling |
Sources
- Costadia. “Furnace Replacement Cost in Seattle, WA (2026).” Accessed 2026.
- Angi. “How Much Does a New Furnace Cost in Seattle? (2026 Data).” Accessed 2026.
- Home Comfort Alliance. “Furnace Installation Cost in Seattle (2026).” Accessed 2026.
- LookUpCost. “Furnace and HVAC Replacement in Seattle (August 2026).” Accessed 2026.
- Homeyou. “Furnace Replacement in Seattle Costs (2026).” Accessed 2026.
- HVAC Project Cost. “HVAC Replacement Cost in Washington State (2026).” Accessed 2026.
- The Center Square. “Washington Building Code Council mandates heat pumps in new residential construction (2022).” Accessed 2026.
- Home Energy Basics. “Washington Heat Pump Rebates and Incentives (2026).” Accessed 2026.
- BetterBuiltNW. “Washington State Energy Code Updates: What to Know (2024).” Accessed 2026.
- Axios Seattle. “New Washington state rules promoting heat pumps face pushback (2023).” Accessed 2026.
- King County. “Energy Code (2021 WSEC, effective March 15, 2024).” Accessed 2026.
- Washington State Building Code Council. “Washington State Energy Code, Residential Provisions (Chapter 51-11R).” Accessed 2026.
- Jonlin, Duane. “Seattle Energy Code: Alterations (2021).” Accessed 2026.
- AC Direct. “Is There Still a Federal HVAC Tax Credit in 2026?” Accessed 2026.
- TroubleFree Inc. “25C Tax Credit Expired: What Homeowners Can Claim in 2026.” Accessed 2026.
- Angi. “How Much Does Furnace Repair Cost in Seattle? (2026 Data).” Accessed 2026.
- U.S. Department of Energy and Federal Register. “Energy Conservation Standards for Consumer Furnaces (2023); 95% AFUE, compliance December 18, 2028.” Accessed 2026.









