HVAC Tune-Up & Maintenance Cost in Seattle, Washington
Our 2026 estimate for HVAC tune-up in Seattle, WA is $120 to $360 (per visit). That puts Seattle 38% above the national average, mainly because of higher incomes and home values, which push labor rates up.
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Seattle Weather and HVAC Load
In a normal year, Seattle racks up 4,482 heating and 210 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Seattle put in far more hours than the air conditioner. On average, Seattle gets 25 freezing nights and 2 days above 90°F per year. Snowfall averages about 4 inches.
| Heating degree days / year | 4,482 |
|---|---|
| Cooling degree days / year | 210 |
| Nights at or below 32°F | 25 |
| Days above 90°F | 2 |
| Average low / high | 45.7°F / 60.8°F |
Seattle Housing Stock
Census figures put the median build year in Seattle at 1974, so a typical house here has about 52 years on it. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Seattle has roughly 156,000 owner-occupied homes, or 44.2% of households. Homes here have a median value of $912,100 and households a median income of $121,984. Those two numbers drive the labor adjustment in our estimate.
NOAA's Storm Events Database shows no hail or damaging-wind days for King County from 2020 through 2025, so storm damage to outdoor units is rare here.
When to Book It
- Airflow is weak, or room temperatures are uneven
- The system hasn't been serviced in the past year
- Your energy bills have crept up
What Moves the Price
- A yearly maintenance plan or a one-time visit
- How many systems the house has
- Extra cleaning of the coil, blower or drain
- One system, or both heating and cooling
We raised the national figures about 38% for Seattle 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
- Checking refrigerant and airflow
- Checking and replacing the filter
- Inspecting the burners, flame sensor and heat exchanger
- Tightening electrical connections
- Cleaning the coil and condensate drain
- Calibrating the thermostat
Washington Permits, Efficiency Rules and Rebates
Washington 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.
Before You Hire
- Yearly plans usually include repair discounts and priority scheduling.
- Have the furnace tuned up in the fall and the AC in the spring.
- Keep your receipts. Many warranties ask for proof of maintenance.
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HVAC Tune-Up & Maintenance Questions from Seattle Homeowners
How much is HVAC tune-up in Seattle?
Plan on $120 to $360, with most jobs near $250. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule HVAC tune-up in Seattle?
Between late spring and early fall. Seattle averages 25 freezing nights a year, and heating calls spike from November through February.
How often should HVAC be serviced?
Once a year for a furnace or an AC. Twice a year for a heat pump or any system that runs year-round.
Is an HVAC maintenance plan worth it?
For most people, yes. A plan usually costs about the same as two tune-ups, and the repair discounts and priority scheduling come with it.
HVAC Tune-Up & Maintenance Near Seattle
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Seattle Sand Point Wsfo; NOAA Storm Events Database 2020-2025, King County. Prices are our estimates, not contractor quotes. Updated 2026.