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Attic Insulation Upgrade Cost in Oregon (2026)

Attic insulation upgrades in Oregon typically run $2,000–$7,600 for a 1,500 sq ft attic upgrade R-30 to R-49 blown cellulose, with blown cellulose loose-fill the dominant residential retrofit material at the IECC R-49 attic minimum. Oregon's Willamette Valley combination of 4,500 annual heating degree days, persistent Pacific Northwest mildew growing conditions, and Cascade Range wood-substrate moisture cycling drives heating-dominant insulation upgrades statewide — and Oregon Coast salt-spray on Astoria, Newport, Coos Bay, and Brookings homes additionally requires closed-cell spray foam at the roofline plus marine-grade fastener replacement on every coastal Oregon retrofit to manage salt-air-driven attic moisture cycling, with high-altitude Bend and Sisters additionally requiring R-60 attic upgrades on every premium residential install.

State Oregon
Cities Covered 14
Typical 1,500 sq ft attic upgrade R-30 to R-49 blown cellulose $2,000 – $7,600
BLS insulation worker wage $24.42/hr

Oregon energy code & climate-load drivers

  • IECC climate zone: 4C-5B
  • Required attic R-value: R-49 (IECC 2021 prescriptive minimum)
  • Required wall R-value: R-21 (above-grade wood-frame)
  • Adopted energy code basis: State-specific code (deviates from IECC baseline — typically more restrictive)
  • Stretch code available: Yes — opt-in or mandatory above-baseline pathway
  • Annual heating + cooling load: 4,500 HDD / 500 CDD
  • Vapor barrier requirement: Warm-side vapor retarder required (typical IECC zones 5+)
  • Dominant attic insulation material: Blown cellulose loose-fill — dominant in heating-dominant Northeast and Upper Midwest
  • IRA HOMES + HEER rebate status: Live — IRA HOMES + HEER rebates currently available to residential homeowners

Oregon licensing, rebates & permits

  • License status: Statewide license required
  • License board: Oregon Construction Contractors Board (CCB) — Residential General Contractor or Specialty (official site)
  • Permit: permit required for attic insulation retrofit per Oregon Residential Specialty Code (Energy); CCB license required statewide on every contract regardless of value

How attic insulation upgrade costs vary in Oregon

State-specific code or insurance rule: Oregon ORS §455.500 imposes the Oregon Residential Specialty Code (Energy) the most restrictive Pacific Northwest residential energy code — Oregon adopted state-specific R-49 attic + R-21 wall + mandatory blower-door testing on every new residential construction, plus the Oregon Reach Code provides a separate stretch-code pathway for municipalities, and Energy Trust of Oregon administers utility-funded weatherization rebates layered with IRA-funded HEAR rebates through the Oregon Department of Energy IRA implementation.

Cities in Oregon

Compare attic insulation upgrade pricing for 14 cities across Oregon.

Albany, OR

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Beaverton, OR

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Bend, OR

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Corvallis, OR

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Eugene, OR

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Gresham, OR

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Hillsboro, OR

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Keizer, OR

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Lake Oswego, OR

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Medford, OR

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Portland, OR

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Salem, OR

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Springfield, OR

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Tigard, OR

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Pricing ranges reflect Oregon market labor (BLS OEWS insulation worker (floor/ceiling/wall) mean $24.42/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.