Attic insulation is the cheapest upgrade on this list and quietly cuts both heating and cooling costs for decades.
Every price on this page is for attic insulation blown in to the recommended R-value (about 1,200 sq ft of attic), compiled from public cost data across all 51 markets we track and refreshed for 2026.
Attic Insulation Cost at a Glance (2026)
| Installed cost range (all states) | $1,150–$4,550 |
|---|---|
| Typical installed cost (average state) | $2,332 |
| Typical yearly energy savings | $439 a year (state range $350–$455) |
| Simple payback at the typical cost | about 5.3 years |
| Expected lifespan | 30 years |
Where the Money Goes
| Cost part | Share | At the typical cost |
|---|---|---|
| Equipment & materials | 45% | $1,049 |
| Labor & installation | 50% | $1,166 |
| Permits & other | 5% | $117 |
What Affects the Price
- Attic size and target R-value: colder states are advised to reach R-49 to R-60, which simply takes more material than the R-38 common in the South.
- Material choice: blown-in fiberglass and cellulose are the budget options; spray foam costs several times more per square foot.
- Existing insulation: topping up sound insulation is cheap; removing wet, moldy or pest-damaged material adds $1-$2 per sq ft.
- Air sealing: sealing top plates, can lights and penetrations first ($250-$750) is what makes the insulation perform as rated.
- Access: low-slope roofs, floored-over attics and tight trusses slow crews down and raise labor.
When Attic Insulation Makes Sense
Attic insulation makes sense in almost every home with less than about 10 inches of existing attic insulation — it is the cheapest comfort upgrade there is and it works in every climate. It makes particular sense before replacing heating or cooling equipment, because a tighter attic can let you buy a smaller system. If your upstairs rooms are noticeably hotter in summer or colder in winter than the ground floor, the attic is the first place to look.
When It Pays to Wait
There are few reasons to wait, but do fix roof leaks and any moisture or pest problems first — insulating over a wet attic traps the problem. If you are planning a major remodel that will open the ceiling or rewire the attic (recessed lights, new circuits), do that work first, then insulate once at the end.
Estimate Your Payback
Enter your own quote and savings estimate to see your simple payback:
Payback Calculator
Attic Insulation Cost by State
- Attic Insulation Cost in Alaska (2026 Guide): Prices, Savings & Rebates — $1,950–$4,450
- Attic Insulation Cost in Alabama (2026 Guide): Prices, Savings & Rebates — $1,250–$2,800
- Attic Insulation Cost in Arkansas (2026 Guide): Prices, Savings & Rebates — $1,150–$2,600
- Insulation Cost in Arizona (2026 Guide): Prices, Savings & Rebates — $1,350–$3,050
- Attic Insulation Cost in California (2026 Guide): Prices, Savings & Rebates — $1,800–$4,150
- Attic Insulation Cost in Colorado (2026 Guide): Prices, Savings & Rebates — $1,500–$3,400
- Attic Insulation Cost in Connecticut (2026 Guide): Prices, Savings & Rebates — $1,650–$3,800
- Attic Insulation Cost in Delaware (2026 Guide): Prices, Savings & Rebates — $1,500–$3,450
- Attic Insulation Cost in Florida (2026 Guide): Prices, Savings & Rebates — $1,350–$3,100
- Attic Insulation Cost in Georgia (2026 Guide): Prices, Savings & Rebates — $1,400–$3,150
- Attic Insulation Cost in Hawaii (2026 Guide): Prices, Savings & Rebates — $2,000–$4,550
- Attic Insulation Cost in Iowa (2026 Guide): Prices, Savings & Rebates — $1,300–$2,950
- Attic Insulation Cost in Idaho (2026 Guide): Prices, Savings & Rebates — $1,300–$2,950
- Attic Insulation Cost in Massachusetts (2026 Guide): Prices, Savings & Rebates — $1,700–$3,900
- Attic Insulation Cost in Maine (2026): Prices, Rebates up to $8,600 & Payback — $1,400–$3,200
- Attic Insulation Cost in Michigan (2026 Guide): Prices, Savings & Rebates — $1,300–$3,000
- Attic Insulation Cost in Minnesota (2026 Guide): Prices, Savings & Rebates — $1,500–$3,400
- Attic Insulation Cost in Montana (2026 Guide): Prices, Savings & Rebates — $1,300–$2,950
- Attic Insulation Cost in North Dakota (2026 Guide): Prices, Savings & Rebates — $1,350–$3,150
- Attic Insulation Cost in New Hampshire (2026 Guide): Prices, Savings & Rebates — $1,450–$3,350
- Attic Insulation Cost in New Mexico (2026 Guide): Prices, Savings & Rebates — $1,250–$2,800
- Attic Insulation Cost in New York (2026): Prices, Rebates up to $14,000 & Payback — $1,850–$4,250
- Attic Insulation Cost in Rhode Island (2026 Guide): Prices, Savings & Rebates — $1,550–$3,550
- Attic Insulation Cost in Vermont (2026 Guide): Prices, Savings & Rebates — $1,500–$3,400
- Attic Insulation Cost in Wisconsin (2026 Guide): Prices, Savings & Rebates — $1,300–$3,000
- Attic Insulation Cost in West Virginia (2026 Guide): Prices, Savings & Rebates — $1,150–$2,650
- Attic Insulation Cost in Wyoming (2026 Guide): Prices, Savings & Rebates — $1,300–$2,950
Coming soon: Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Missouri, Mississippi, North Carolina, Nebraska, New Jersey, Nevada, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, Washington DC. New state guides are published twice a day.
Figures compiled from public sources, updated October 2026. Local quotes vary — get 2–3 estimates.