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Attic Insulation cost in Washington

How Much Does Attic Insulation Cost in Washington, District of Columbia?

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 Washington, District of Columbia typically costs $1.31 to $3.66 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 Washington, District of Columbia

$1.31 – $3.66

per sq ft

Prices in Washington are 5.0% 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

    $1.11 – $3.11 per sq ft

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

  • Standard

    $1.31 – $3.66 per sq ft

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

  • Premium

    $1.64 – $4.58 per sq ft

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

Cost Breakdown in Washington

ComponentCategoryPrice RangeUnit
Materialsmaterial$0.60 – $1.65sq ft
Laborlabor$0.45 – $1.28sq ft
Supplies & Othersupplies$0.16 – $0.44sq ft
Equipment & Disposalequipment$0.11 – $0.29sq ft
Prices adjusted for Washington 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 Washington, District of Columbia

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 costs5.0% above avg
Labor costs4.0% above avg

Frequently Asked Questions

References

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More Cost Intelligence for Washington

Attic Insulation: national cost guideAll Washington cost guides

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