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Attic insulation cost, estimated in seconds.

Choose whether old insulation stays or goes, then set the attic size. We'll estimate the installed price from published national averages.

Estimated total

$1,500–$6,000

Typical range from published national prices

Attic floor area$1,500–$6,000

Estimates use published national averages. Your quote depends on your job and your area.

1What's the job?

Attic floor area$1–$4 per sq ft1,500 sq ft

Your attic floor is usually about the same size as your home's top floor.

Read this first

Prices are installed, for blown-in or batt insulation.
Spray foam costs more: about $1,100 to $9,000 for a typical attic.
Sealing air leaks before insulating gives you more for your money.
Some utilities offer rebates for attic insulation. Check before you book.
Prices vary a lot by area. Compare two or three quotes from local pros for the same job.

FAQ

How much does it cost to insulate a 1,500 sq ft attic?

About $1,500 to $6,000, according to HomeGuide.

Should old insulation be removed?

Only if it's wet, moldy, pest-damaged or compressed. Otherwise new insulation can usually go on top.

Published national estimates, last checked 2026-11-12.

Tell us about the job once. We match you with up to three local pros. No account, no fee, and your request is never resold.