Furnace Replacement Cost in Gresham, Oregon
Our 2026 estimate for furnace replacement in Gresham, OR is $3,600 to $8,800. That puts Gresham 13% above the national average, mainly because of higher incomes and home values, which push labor rates up and the bigger heating equipment this climate calls for.
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Gresham Weather and HVAC Load
Gresham logs 4,154 heating degree days and 427 cooling degree days in a normal year, based on the closest NOAA weather station. Heating is the bigger job here, and furnaces and heat pumps in Gresham put in far more hours than the air conditioner. Count on roughly 28 nights below 32°F and 16 afternoons past 90°F in a typical year. Snowfall averages about 3 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 50,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 4,154 |
|---|---|
| Cooling degree days / year | 427 |
| Nights at or below 32°F | 28 |
| Days above 90°F | 16 |
| Average low / high | 46°F / 63.5°F |
Gresham Housing Stock
Half the homes in Gresham were built before 1981 (Census ACS median), so the typical house is about 45 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 56.1% of occupied homes, roughly 24,000 households. Homes here have a median value of $440,000 and households a median income of $73,608. Those two numbers drive the labor adjustment in our estimate.
Between 2020 and 2025, NOAA's Storm Events Database logged 2 days with damaging thunderstorm winds in Multnomah County. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost.
When Replacement Makes Sense
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
- A repair quote runs past a third of the cost of a new unit
- Gas or electric bills keep climbing even though usage hasn't changed
- The furnace is 15 to 20 years old or more
What Moves the Price
- Condition of the existing ductwork and any changes it needs
- Single-stage, two-stage or modulating gas valve
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- New PVC venting if you move to a condensing model
- BTU size, which should come from a Manual J load calculation
- Permit and inspection fees, which the local building department sets
For Gresham we raised the national figures about 13%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Removing and hauling away the old furnace
- Gas line and vent connections
- The permit and the manufacturer warranty registration
- The new furnace, filter rack and thermostat wiring
- Combustion and safety tests
Oregon Permits, Efficiency Rules and Rebates
Oregon falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2. Equipment replacements in Gresham generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Oregon license or registration number and a certificate of insurance with the quote. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- Look up utility rebates on 95%+ AFUE units before you buy.
- Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
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Furnace Replacement Questions from Gresham Homeowners
How much is furnace replacement in Gresham?
Plan on $3,600 to $8,800, with most jobs near $6,500. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Gresham?
Between late spring and early fall. Gresham averages 28 freezing nights a year, and heating calls spike from November through February.
Is a high-efficiency furnace worth it?
In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.
How long does a furnace replacement take?
A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.
Furnace Replacement Near Gresham
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Portland Troutdale Airport; NOAA Storm Events Database 2020-2025, Multnomah County. Prices are our estimates, not contractor quotes. Updated 2026.