Insulation Costs 2026
Plan your insulation project with real 2026 pricing data, energy savings estimates, and available rebates.
Pricing data is sourced from contractor surveys, supplier price lists, and homeowner reports across 50 U.S. metro markets. See our research methodology →
Cost by Insulation Type
| Insulation Type | Low | High | Average |
|---|---|---|---|
| Fiberglass Batts | $0.30/sq ft | $1.50/sq ft | $0.90/sq ft |
| Blown-In Fiberglass | $1.00/sq ft | $2.50/sq ft | $1.75/sq ft |
| Blown-In Cellulose | $1.00/sq ft | $2.00/sq ft | $1.50/sq ft |
| Open-Cell Spray Foam | $1.50/sq ft | $2.50/sq ft | $2.00/sq ft |
| Closed-Cell Spray Foam | $2.00/sq ft | $6.00/sq ft | $4.00/sq ft |
| Rigid Foam Board | $0.75/sq ft | $3.00/sq ft | $1.85/sq ft |
Cost by Area of Home
| Area | Low | High | Average |
|---|---|---|---|
| Attic Insulation | $1,500 | $5,000 | $3,250 |
| Wall Insulation | $1,000 | $4,000 | $2,500 |
| Basement Insulation | $2,000 | $8,000 | $5,000 |
| Crawl Space Insulation | $1,500 | $5,000 | $3,250 |
| Garage Insulation | $500 | $2,000 | $1,250 |
Insulation Removal Costs
Fiberglass Batt Removal
$1.00 - $2.00/sq ft
Straightforward removal from accessible areas
Blown-In Removal (Vacuum)
$1.50 - $2.50/sq ft
Specialized vacuum equipment required
Spray Foam Removal
$2.00 - $3.50/sq ft
Labor-intensive, may damage surfaces
Contaminated Insulation
$3.00 - $7.00/sq ft
Mold, asbestos, or pest contamination
Full Attic Cleanout
$1,500 - $5,000
Removal + disposal + sanitizing
Energy Savings & ROI
| Upgrade | Annual Savings | Payback Period |
|---|---|---|
| Add Attic Insulation (R-19 to R-49) | $200 - $600 | 2-5 years |
| Insulate Uninsulated Walls | $150 - $400 | 3-7 years |
| Seal & Insulate Basement | $250 - $500 | 4-8 years |
| Spray Foam Entire Home | $500 - $1,200 | 5-10 years |
| Air Sealing + Insulation | $350 - $800 | 3-6 years |
2026 Rebates & Tax Credits
Federal Tax Credit (25C)
30% of cost, up to $1,200/year
Covers insulation materials and air sealing. Must meet ENERGY STAR requirements.
IRA Home Efficiency Rebates
Up to $1,600 for insulation
Income-qualified rebates for energy efficiency improvements under the Inflation Reduction Act.
Utility Company Rebates
$200 - $1,000 varies
Many utility companies offer rebates for insulation upgrades. Check with your local provider.
State Energy Programs
Varies by state
Many states offer additional tax credits, rebates, or low-interest loans for insulation projects.
ENERGY STAR Certification
Qualifies for federal credits
Insulation meeting ENERGY STAR specs qualifies for the 25C tax credit when installed in existing homes.
Frequently Asked Questions
The cost to fully insulate a 1,500 sq ft home ranges from $4,000-$12,000 depending on insulation type and areas covered. Attic-only insulation costs $1,500-$5,000. Adding wall insulation brings the total to $3,000-$9,000. Spray foam for the entire home runs $8,000-$15,000. Most homeowners spend $5,000-$8,000 for comprehensive insulation with blown-in or batt products.
Spray foam costs 2-4x more than traditional insulation but offers superior performance. Closed-cell spray foam provides the highest R-value per inch (R-6 to R-7), acts as a moisture barrier, and provides air sealing in one application. It typically pays for itself in 5-10 years through energy savings. It's especially worth it for basements, crawl spaces, and rim joists where moisture control matters.
Attic insulation offers the best return on investment, typically paying for itself in 2-5 years. The DOE estimates that adding attic insulation from R-19 to R-49 saves $200-$600 annually. Air sealing combined with attic insulation maximizes savings. Blown-in cellulose and fiberglass offer the best cost-to-performance ratio for most homes.
Yes, the federal 25C Energy Efficient Home Improvement Credit covers 30% of insulation costs, up to $1,200 per year. This applies to insulation materials and air sealing products that meet ENERGY STAR requirements. The Inflation Reduction Act also provides income-qualified rebates up to $1,600. Many states and utilities offer additional rebates.
Insulation removal typically costs $1-$2 per square foot for standard materials. Blown-in insulation removal using vacuum equipment costs $1.50-$2.50 per sq ft. Contaminated insulation (mold, pests, asbestos) costs $3-$7 per sq ft due to safety precautions. A full attic cleanout including removal, disposal, and sanitizing runs $1,500-$5,000.
Ready to Lower Your Energy Bills?
Get free quotes from insulation contractors in your area and start saving on energy costs.
Get Matched FreeGet a free quote or estimate your Insulation cost
Skip the search — we already know what service you need. Get matched with vetted local pros, or see what homeowners typically pay in 2026.
Get Matched With Local Insulation Pros
Free · ~2 minutes · No obligation to hire
Estimate Your Insulation Cost
2026 national average ranges - Instant results