How much does blown-in insulation cost?
Blown-in insulation runs $800 for a basic cellulose top-up, $1,900 for a typical R-49 install with baffles and air sealing, and $4,500+ for fiberglass or full removal-and-replace jobs.
Quick price points (2026)
| Scope | Cost | What it includes |
|---|---|---|
| Low | $800 | whole attic |
| Typical | $1,900 | whole attic |
| High | $4,500 | whole attic |
How to budget for this project
- Get 3 quotes
Get itemized quotes from at least three licensed contractors in your area.
- Adjust for your region
Compare the same scope and account for regional labor and permitting.
- Add 10–15% contingency
Hidden conditions, code upgrades and permit fees can increase the original quote.
- Plan the cash, not the financing
Build the replacement cost into the home's repair plan before the work becomes an emergency.