Attic Insulation Cost by State (2026)
Average prices for attic insulation across 43 US states, ranked from most affordable to priciest. Ranges are computed from local cost factors — regional labor rates, material availability, permit requirements, and climate — so you can plan a realistic budget wherever you live.
| # | State | Covered Cities | Average Range (2026) |
|---|---|---|---|
| 1 | OH | 5 | $1 – $4 per sq ft |
| 2 | MI | 2 | $1 – $4 per sq ft |
| 3 | SD | 1 | $1 – $4 per sq ft |
| 4 | AZ | 2 | $1 – $4 per sq ft |
| 5 | NE | 1 | $1 – $4 per sq ft |
| 6 | OK | 2 | $1 – $4 per sq ft |
| 7 | VA | 3 | $1 – $4 per sq ft |
| 8 | AR | 1 | $1 – $4 per sq ft |
| 9 | KY | 2 | $1 – $4 per sq ft |
| 10 | MO | 2 | $1 – $4 per sq ft |
| 11 | MS | 1 | $1 – $4 per sq ft |
| 12 | IN | 1 | $1 – $4 per sq ft |
| 13 | NY | 5 | $1 – $4 per sq ft |
| 14 | FL | 6 | $1 – $4 per sq ft |
| 15 | ND | 1 | $1 – $4 per sq ft |
| 16 | KS | 1 | $1 – $4 per sq ft |
| 17 | IA | 1 | $1 – $4 per sq ft |
| 18 | SC | 3 | $1 – $4 per sq ft |
| 19 | NM | 1 | $1 – $4 per sq ft |
| 20 | GA | 3 | $1 – $4 per sq ft |
| 21 | TX | 7 | $1 – $4 per sq ft |
| 22 | AL | 3 | $1 – $4 per sq ft |
| 23 | LA | 2 | $1 – $4 per sq ft |
| 24 | TN | 4 | $1 – $4 per sq ft |
| 25 | NC | 4 | $1 – $4 per sq ft |
| 26 | HI | 1 | $2 – $6 per sq ft |
| 27 | DC | 1 | $2 – $5 per sq ft |
| 28 | OR | 3 | $2 – $5 per sq ft |
| 29 | WA | 3 | $2 – $5 per sq ft |
| 30 | UT | 1 | $2 – $5 per sq ft |
| 31 | RI | 1 | $2 – $5 per sq ft |
| 32 | IL | 1 | $2 – $5 per sq ft |
| 33 | PA | 2 | $2 – $5 per sq ft |
| 34 | CA | 10 | $2 – $5 per sq ft |
| 35 | MA | 1 | $2 – $5 per sq ft |
| 36 | MD | 1 | $2 – $5 per sq ft |
| 37 | MN | 1 | $2 – $5 per sq ft |
| 38 | WI | 2 | $2 – $5 per sq ft |
| 39 | CO | 2 | $2 – $5 per sq ft |
| 40 | NV | 2 | $2 – $5 per sq ft |
| 41 | ID | 1 | $2 – $5 per sq ft |
| 42 | NJ | 2 | $2 – $6 per sq ft |
| 43 | CT | 1 | $2 – $5 per sq ft |
Cheapest vs. Most Expensive States
The most affordable state for attic insulation in our data is OH (from $1 per sq ft), while the priciest is CT (up to $5 per sq ft). Regional differences come from labor rates, permit fees, and how common the work is in each market.
How We Calculate State Averages
We take every covered city's local cost factor — the multiplier that adjusts national pricing for that metro — and average it per state. The result is a practical planning range, not a quote. For an exact figure for your project, use the Cost Calculator or read the full Attic Insulation guide.