Updated September 2026 · Typical installed prices for Seattle, Tacoma and Everett-area homes
Most Puget Sound homeowners pay $1.50 to $2.50 per sq ft for blown-in attic insulation. A typical project runs $2,250 – $3,750 for a 1,500 sq ft attic.
per sq ft for blown-in attic insulation
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Adjust the size and options to see a typical installed price for a Puget Sound home.
Loose-fill to today’s R-49 attic target.
Out with contaminated or compressed insulation.
Batts or spray foam under the floor.
Adds insulation to existing walls without opening them.
Priced by square foot and target R-value.
Rodent-damaged or wet insulation must come out first.
Sealing leaks before insulating makes it far more effective.
Utilities often offer insulation rebates – check yours.
Ranges are typical installed prices for the Seattle–Tacoma–Everett area, checked against published local pricing (sources below). They’re for planning. Your written quote is the real number.
Blown-in attic insulation typically costs $1.50 to $2.50 per square foot, or about $2,250 to $3,750 for a 1,500 square foot attic.
About $1 to $2 per square foot.
Many local utilities offer them. Check your utility’s current programs before booking.
Our typical range, $1.50–$2.50 per sq ft for blown-in attic insulation, sits inside what local contractors and cost publishers report. Their numbers differ because each prices a different scope, finish level or home size.
Blown-in insulation added over existing to about R-49, with baffles at the eaves.
Removing old or contaminated insulation, air sealing, attic ventilation work.
Prices checked September 30, 2026 by Clearview Home Guide.
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