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Insulation in Seattle, WA

Compare 6 local insulation pros. Typical service: $1765–$3405.

Top Insulation Companies in Seattle

  1. 1.Insulation Co

    5.0★ (288 reviews)

    5.0★ from 288 reviews

    +12064977358Website

  2. 2.Energy Saver Solutions Inc - HVAC & Insulation W Seattle

    5.0★ (186 reviews)

    5.0★ from 186 reviews

    +12062226619

  3. 3.SLUE Attic Insulation & Roofing Services Seattle, WA

    4.2★ (12 reviews)

    4.2★ from 12 reviews

    +12065932482

  4. 4.Super Attic Solution

    4.6★ (7 reviews)

    4.6★ from 7 reviews

  5. 5.Highline Insulation

    +14253088553

  6. 6.Seattle Insulation Services

    +12062587989Website

Insulation Cost in Seattle

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in Seattle
Attic blown-in insulation$1,765–$3,405/job
Attic spray foam$3,783–$7,566/job

Insulation prices in Seattle run about 26% above the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.

Quotes on this page come from 6 companies serving Seattle, rated 4.7★ on average across 493 customer reviews.

Seattle Climate & Seasonal Timing

What Seattle's weather means for scheduling insulation.

Last spring frost
March 5
First fall frost
November 24
Annual precipitation
37.72"
Heating degree days
4,370
Cooling degree days
188
MonthLowHighPrecip
Jan37.3°48.6°5.47"
Feb37.1°51.4°3.52"
Mar39.7°55.4°3.85"
Apr42.9°59.9°2.79"
May48.8°65.8°2.01"
Jun53.3°70.7°1.57"
Jul56.5°75.8°0.85"
Aug57°76.2°0.94"
Sep53.1°70.8°1.3"
Oct46.8°60.7°3.38"
Nov40.6°52.4°5.98"
Dec36°46.9°6.06"

NOAA station data 3.2 miles from Seattle.

Permits & Regulations in WA

  • Painting and remodeling in Washington require Labor and Industries contractor registration, with no dollar-based exemption
  • Specialty contractor registration requires a $6,000 surety bond and liability insurance
  • Work that disturbs paint in homes built before 1978 must be done by a Lead-Safe Certified firm under the EPA Renovation, Repair and Painting Rule

License required: Washington L&I specialty contractor registration

Sources: lni.wa.gov, www.epa.gov

Insulation FAQs for Seattle

How much does attic insulation cost in Seattle?

Blown-in attic insulation in Seattle typically runs $1765-$3405 for a 1,000 square foot attic; spray foam costs two to three times more.

How many insulation contractors serve Seattle?

We track 6 insulation contractors serving Seattle.

Is insulation in Seattle more expensive than average?

Installation labor in Seattle runs about +26.1% versus the national average.

How much insulation does a home in Seattle need?

Seattle sees about 4,370 heating degree days and 188 cooling degree days a year; the colder the climate, the higher the attic R-value worth paying for.

Does insulation help with Seattle summers?

Yes -- with summer highs near 76F in Seattle, attic insulation cuts the heat load on the air conditioner as much as it holds heat in winter.

Do insulation contractors in WA need a license?

In WA, Painting and remodeling in Washington require Labor and Industries contractor registration, with no dollar-based exemption. Adding attic insulation in Seattle rarely needs a permit.

Is spray foam worth it in Seattle?

Spray foam earns its price mainly when ducts or an air handler sit in the attic; otherwise blown-in at $1765-$3405 gets most Seattle homes the same R-value for less.

How many quotes should I get for insulation in Seattle?

Two or three; with 6 insulation contractors serving Seattle, compare the R-value and depth each quote installs, not just the price.