In Illinois, most attic insulation projects cost between $1,500 and $5,000 per job, with a typical price near $3,000. Local labour, permits and materials move the final price, so treat the range below as a planning guide.
Typical attic insulation cost
$1,500 – $5,000
per job · typical $3,000
A general planning range, not a quotation.
Attic insulation cost breakdown
- Fiberglass batts$1,000 – $2,500typical $1,800
- Blown-in cellulose$1,500 – $3,500typical $2,500
- Spray foam$3,000 – $7,000typical $5,000
At a glance
- Typical range$1,500 – $5,000
- Unitper job
- Cities covered50
What Attic Insulation costs
Cost covers material (fiberglass, cellulose, or spray foam) and installation for a 1,200 sq ft attic. Includes air sealing and baffles. Spray foam costs more but offers higher R-value.
By city in Illinois
- Addison
- Alton
- Arlington Heights
- Belleville
- Berwyn
- Bolingbrook
- Buffalo Grove
- Calumet City
- Carbondale
- Carol Stream
- Carpentersville
- Champaign
- Chicago
- Cicero
- Crystal Lake
- DeKalb
- Decatur
- Des Plaines
- Downers Grove
- Elgin
- Elmhurst
- Evanston
- Glenview
- Hanover Park
- Hoffman Estates
- Joliet
- Kankakee
- Lombard
- Moline
- Mount Prospect
- Naperville
- Normal
- Oak Lawn
- Oak Park
- Orland Park
- Palatine
- Park Ridge
- Peoria
- Rock Island
- Rockford
- Romeoville
- Round Lake Beach
- Schaumburg
- Skokie
- Springfield
- Streamwood
- Tinley Park
- Urbana
- Waukegan
- Wheaton
Frequently asked questions
What R-value is recommended?
R-49 for most of the US. Check local codes. Older homes often have R-19 or less.
Does attic insulation pay for itself?
Yes, typically within 2–5 years through reduced heating and cooling bills.
Can I install it myself?
Blown-in cellulose requires a rental machine. Batts are DIY-friendly but less effective if gaps are left.