Blown-in insulation costs $1,661 on average in 2026, with most homeowners paying $987 to $2,335 (Angi, 16,919 projects).1 HomeGuide averages $1,900 and Fixr averages $5,000, but Fixr is pricing the attic, walls, and garage of a 2,000 sq ft home together.2,3 Prices below are national averages* for 2026.
*National averages, not local quotes. Your price depends on area, R-value, material, and prep work such as air sealing.
$1,661
2026 average, Angi
$1.00 – $2.80
per sq ft installed, HomeGuide
$900 – $3,600
attic, HomeGuide
$100 – $200
blower rental per day, HomeGuide
Cost per square foot
| Source | Per sq ft | Average total |
|---|---|---|
| Angi | $1.75 – $7.50 | $1,661 |
| HomeGuide | $1.00 – $2.80 | $1,900 |
| Fixr | $1.65 – $3.80 (new construction) | $5,000 (whole house) |
The sources do not agree: Angi’s top end of $7.50 per sq ft is about 2.7 times HomeGuide’s $2.80.1,2 Angi’s figure covers attics at $3 to $7.50, which likely includes higher R-values, our reading. For a 1,000 sq ft attic HomeGuide shows $900 to $2,400.2
Cost by area (HomeGuide)
| Area | Cost |
|---|---|
| Attic floor | $900 – $3,600 |
| Exterior walls | $1,900 – $7,800 |
| Garage attic floor | $520 – $1,400 |
| Garage walls | $950 – $3,200 |
| 2-car garage | $1,400 – $4,600 |
| Whole house, existing | $4,500 – $16,000 |
Cost by R-value (Angi)
| R-value | Cost |
|---|---|
| R-13 to R-21 | $230 – $330 |
| R-30 to R-49 | $500 – $1,600 |
| R-38 to R-49 | $1,300 – $1,600 |
| R-49 to R-60 | $1,600 – $2,000 |
Cost by material, installed (HomeGuide)
| Material | R-value per inch | Per sq ft |
|---|---|---|
| Fiberglass | 2.2 – 2.9 | $1.00 – $2.80 |
| Cellulose | 3.1 – 3.8 | $1.20 – $2.80 |
| Rockwool | 3.2 – 4.1 | $1.90 – $4.20 |
Prep and add-ons
| Item | Cost | Source |
|---|---|---|
| Air sealing | $300 – $1,500 (Angi); $350 – $3,000 (HomeGuide) | Angi, HomeGuide |
| Old insulation removal | $1 – $3 per sq ft | Angi, HomeGuide |
| Pest control | $50 – $500 | Angi |
| Roof vent | $200 – $700 | HomeGuide |
| Asbestos removal | $1,200 – $3,300 | Angi |
DIY vs pro
HomeGuide puts DIY at $0.35 to $1.50 per sq ft, or $500 to $1,200 total, and calls it a two-person job: one feeds the blower, one runs the hose.2 Machine rental runs $100 to $200 per day, and some stores include it when you buy 10 to 20 bags.2 Attics are the realistic DIY target; walls and anything with mold or old wiring are not. Home Depot’s blown-in insulation section lists current bags and prices (plain link, not affiliate). Use our insulation calculator to size the job.
Related guides
Wall Insulation Cost: What You’ll Pay in 2026
Attic Insulation Removal Cost: What You’ll Pay in 2026
Soundproofing Cost
Attic Insulation Cost
Spray Foam Insulation Cost
Insulation Calculator
All cost guides
Sources
1. Angi — How Much Does Blown-In Insulation Cost?
2. HomeGuide — Blown-in Insulation Cost
3. Fixr — Blown-In Insulation Cost