How Much Does a Home Insulation Cost? (2026)
Proper insulation reduces heating and cooling costs by 20–30%. Blown-in fiberglass and cellulose are ideal for attics, spray foam provides the best air sealing for walls and crawl spaces, and batt insulation is a budget-friendly option for open stud bays. R-value requirements vary by climate zone.
National Average Cost
Low End
$1,500
Average
$3,500
High End
$8,000
Cost Breakdown
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Project Details
Timeline
1–2 days
Permits
Generally not required for re-insulation; may be needed for new construction
Best Season
fall
Frequently Asked Questions
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Home Insulation Cost by State
Costs vary significantly by location. Select your state for localized pricing:
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