AC Installation Cost in Hillsboro, Oregon

Hillsboro Weather and HVAC Load

In a normal year, Hillsboro racks up 4,830 heating and 275 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here. The AC still runs every summer, but it works far fewer hours than the furnace does. A normal year brings 64 nights at or below freezing and 17 days over 90°F. Snowfall averages about 3 inches.

Hillsboro Housing Stock

The median Hillsboro home dates to 1997, according to the Census ACS. That makes the typical house about 29 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. About 21,000 households here own their home, 50.6% of the occupied total. Homes here have a median value of $483,400 and households a median income of $103,207. Those two numbers drive the labor adjustment in our estimate.

Washington County had 1 hail day and 1 day with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. 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 It Makes Sense

• The AC is 12 to 15 years old or more
• The house can't reach the thermostat setting on hot afternoons
• It still runs on R-22 refrigerant
• It has had more than one refrigerant leak

What Moves the Price

• Tonnage, based on house size and local climate
• The pad, permit and refrigerant (R-410A or the newer R-454B)
• Whether the coil and line set also need replacing
• SEER2 rating and whether the compressor is single-stage or variable-speed
• Electrical work such as a new disconnect, breaker or wiring

We raised the national figures about 4% for Hillsboro using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.

What the Quote Should Cover

• The electrical disconnect and wiring
• Removing the old condenser and coil
• Startup, an airflow check and warranty registration
• Refrigerant charge and a leak test
• The new condenser, coil and, if needed, line set

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. Plan on a mechanical permit for most replacements in Hillsboro; the contractor normally pulls it. Before you sign, ask each bidder for their Oregon license or registration number and proof of insurance. 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

• Fall and early spring installs often come with better pricing and shorter waits.
• Ask what federal, state or utility incentives apply to the model you're quoted.
• Ask for a Manual J calculation. "Same size as the old one" isn't sizing.

AC Installation Questions from Hillsboro Homeowners

More HVAC Prices in Hillsboro

• Furnace Replacement in Hillsboro
• Furnace Repair in Hillsboro
• AC Repair in Hillsboro
• Heat Pump Installation in Hillsboro
• Heat Pump Repair in Hillsboro
• HVAC System Replacement in Hillsboro
• Ductless Mini-Split Installation in Hillsboro
• Emergency HVAC Repair in Hillsboro
• HVAC Tune-Up & Maintenance in Hillsboro
• Boiler Replacement in Hillsboro
• Air Duct Cleaning in Hillsboro

AC Installation Near Hillsboro

• Gresham $4,000 to $9,000
• Eugene $3,800 to $8,600
• Salem $3,900 to $8,700
• Portland $4,400 to $10,000