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Attic Insulation cost in Seattle

How Much Does Attic Insulation Cost in Seattle, Washington?

Add attic insulation (blown-in or batts) to recommended R-value over an accessible attic floor, materials and labor; old insulation removal and spray foam excluded.

Attic Insulation in Seattle, Washington typically costs $1.43 to $4.01 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.

Attic Insulation in Seattle, Washington

$1.43 – $4.01

per sq ft

Prices in Seattle are 19.0% higher than the national average for attic insulation.

National average: $1.25 – $3.50 per sq ft

What you get at each price level

  • Basic

    $1.21 – $3.41 per sq ft

    Blown-in fiberglass added over existing insulation to the recommended R-value, baffles at eaves, depth markers

  • Standard

    $1.43 – $4.01 per sq ft

    Blown-in fiberglass to the recommended R-value, baffles at eaves, attic hatch weatherstripped, depth markers

  • Premium

    $1.79 – $5.01 per sq ft

    Blown-in fiberglass to the recommended R-value, eave baffles, insulated hatch cover, dams around flues, depth markers

Cost Breakdown in Seattle

ComponentCategoryPrice RangeUnit
Materialsmaterial$0.59 – $1.63sq ft
Laborlabor$0.58 – $1.65sq ft
Supplies & Othersupplies$0.16 – $0.44sq ft
Equipment & Disposalequipment$0.10 – $0.29sq ft
Prices adjusted for Seattle local market conditions.

Attic Insulation photo examples

  • Pink fiberglass batts laid between wood joists below roof rafters in an attic.

    Pink fiberglass batt insulation between attic joists

    Photo: zieak · CC BY 2.0 · Source

  • White fluffy insulation covering the attic floor beneath wood rafters and reflective sheathing.

    White loose-fill insulation over an attic floor beneath rafters

    Photo: Jason Dale · CC BY-SA 3.0 · Source

  • Attic with loose insulation between joists, a plank walkway and a small window at the gable.

    Attic floor with insulation and plank walkway under the roof

    Photo: Scott Arneman · CC BY-SA 3.0 · Source

Cost Factors in Seattle, Washington

What Affects Pricing

  • Materials ($0.57-$1.57 per square foot)
  • Labor ($0.43-$1.23 per square foot)
  • Supplies & Other ($0.15-$0.42 per square foot)
  • Equipment & Disposal ($0.10-$0.28 per square foot)

Local Price Adjustments

Material costs4.0% above avg
Labor costs34.0% above avg

Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.

Frequently Asked Questions

References

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More Cost Intelligence for Seattle

Attic Insulation: national cost guideAll Seattle cost guides

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