How Much Does Attic Insulation Cost?
Updated for 2024 — national average costs with state-by-state breakdowns
What Does Attic Insulation Include?
Adding or replacing attic insulation is one of the most cost-effective home energy upgrades. Options include blown-in fiberglass, cellulose, and spray foam.
The national average cost for attic insulation is $2,000 per project. Most homeowners pay between $1,000 and $3,500, though costs can vary significantly based on your location, the scope of work, and other factors outlined below.
What Affects the Price?
Type
Blown-in fiberglass: $1.00-$1.50/sq ft. Cellulose: $1.00-$1.50/sq ft. Spray foam: $2.50-$5.00/sq ft
Attic Size
1,000 sq ft: $1,000-$2,500. 1,500 sq ft: $1,500-$3,500. 2,000 sq ft: $2,000-$5,000
Key Cost Factors
- ✓Attic size
- ✓Insulation type
- ✓Current insulation condition
- ✓R-value target
- ✓Accessibility
💡 Tips to Save Money
- 1.Blown-in insulation is the most affordable option
- 2.Check for utility rebates — many cover 25-50% of insulation costs
- 3.DIY blown-in insulation kits are available at home improvement stores
- 4.Seal air leaks before adding insulation for maximum benefit
Attic Insulation Cost by State
Costs vary significantly by state due to labor rates, cost of living, and local market conditions. Click any state for a detailed breakdown.
| State | Low | Average | High |
|---|---|---|---|
| Alabama | $820 | $1,640 | $2,870 |
| Alaska | $1,280 | $2,560 | $4,480 |
| Arizona | $950 | $1,900 | $3,325 |
| Arkansas | $800 | $1,600 | $2,800 |
| California | $1,350 | $2,700 | $4,725 |
| Colorado | $1,080 | $2,160 | $3,780 |
| Connecticut | $1,220 | $2,440 | $4,270 |
| Delaware | $1,050 | $2,100 | $3,675 |
| Florida | $980 | $1,960 | $3,430 |
| Georgia | $900 | $1,800 | $3,150 |
| Hawaii | $1,420 | $2,840 | $4,970 |
| Idaho | $920 | $1,840 | $3,220 |
| Illinois | $1,050 | $2,100 | $3,675 |
| Indiana | $880 | $1,760 | $3,080 |
| Iowa | $860 | $1,720 | $3,010 |
| Kansas | $850 | $1,700 | $2,975 |
| Kentucky | $840 | $1,680 | $2,940 |
| Louisiana | $870 | $1,740 | $3,045 |
| Maine | $1,020 | $2,040 | $3,570 |
| Maryland | $1,150 | $2,300 | $4,025 |
| Massachusetts | $1,300 | $2,600 | $4,550 |
| Michigan | $920 | $1,840 | $3,220 |
| Minnesota | $1,020 | $2,040 | $3,570 |
| Mississippi | $780 | $1,560 | $2,730 |
| Missouri | $870 | $1,740 | $3,045 |
| Montana | $950 | $1,900 | $3,325 |
| Nebraska | $880 | $1,760 | $3,080 |
| Nevada | $1,020 | $2,040 | $3,570 |
| New Hampshire | $1,120 | $2,240 | $3,920 |
| New Jersey | $1,250 | $2,500 | $4,375 |
| New Mexico | $900 | $1,800 | $3,150 |
| New York | $1,320 | $2,640 | $4,620 |
| North Carolina | $900 | $1,800 | $3,150 |
| North Dakota | $900 | $1,800 | $3,150 |
| Ohio | $900 | $1,800 | $3,150 |
| Oklahoma | $830 | $1,660 | $2,905 |
| Oregon | $1,100 | $2,200 | $3,850 |
| Pennsylvania | $1,020 | $2,040 | $3,570 |
| Rhode Island | $1,150 | $2,300 | $4,025 |
| South Carolina | $870 | $1,740 | $3,045 |
| South Dakota | $850 | $1,700 | $2,975 |
| Tennessee | $860 | $1,720 | $3,010 |
| Texas | $930 | $1,860 | $3,255 |
| Utah | $950 | $1,900 | $3,325 |
| Vermont | $1,080 | $2,160 | $3,780 |
| Virginia | $1,050 | $2,100 | $3,675 |
| Washington | $1,150 | $2,300 | $4,025 |
| West Virginia | $800 | $1,600 | $2,800 |
| Wisconsin | $940 | $1,880 | $3,290 |
| Wyoming | $920 | $1,840 | $3,220 |
Frequently Asked Questions
How much can insulation save on energy bills?
Properly insulated attics can reduce heating and cooling costs by 15-25%.