HVAC System Replacement Cost in Gresham, Oregon
Expect to pay $9,600 to $20,800 for full HVAC system replacement in Gresham, OR. Most homeowners end up near $15,800, depending on the equipment tier and how much of the old setup can be reused.
Compare Free Quotes in Gresham
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
- Both units keep needing repairs
- Some rooms are uncomfortable, and the energy bills are high
- An old R-22 AC paired with an aging furnace
What Moves the Price
- Permits and electrical work
- Equipment sized to the house and climate
- Furnace plus AC, or heat pump plus air handler
- Duct repair or replacement
- Efficiency ratings: SEER2, AFUE and HSPF2
- Thermostat and zoning upgrades
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
- A load calculation and system design
- New, matched heating and cooling equipment
- Startup, testing and warranty registration
- Removing the old equipment
- Duct connections and sealing
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
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Get one quote for a heat pump system and one for a furnace plus AC.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
Get Free HVAC System Replacement Quotes in Gresham
Tell us where you are and up to three licensed local pros will get in touch. You don't have to hire any of them.
HVAC System Replacement Questions from Gresham Homeowners
How much is full HVAC system replacement in Gresham?
Plan on $9,600 to $20,800, with most jobs near $15,800. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Gresham?
Between late spring and early fall. Gresham averages 28 freezing nights a year, and heating calls spike from November through February.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
HVAC System 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.