How much insulation do I need?

Measure the area and target the right R-value for your climate — R-38 to R-60 in attics, R-13 to R-21 in walls.

Is spray foam worth the extra cost?

Closed-cell foam costs more but delivers the highest R-value per inch and air-seals, which can cut energy bills the most.

How much does it cost to insulate a house?

It depends on area and type — from about $1/ft² for batts to $7/ft² for spray foam, installed.

Insulation Cost in California

Local 2026 pricing for California

Insulation costs in California run roughly 28% above the national average. California's Title 24 energy code mandates high R-values and tight air-sealing, and premium spray-foam jobs plus high labor push insulation costs well above the national average.

Your measurements

Area length(ft)

Area width / wall height(ft)

Insulation type

Price per ft²($/ft²)

Enter your measurements

Fill in the fields to see your estimate.

Why California prices differ

California's Title 24 energy code mandates high R-values and tight air-sealing, and premium spray-foam jobs plus high labor push insulation costs well above the national average.

Project size — larger insulation jobs lower the cost per unit but raise the total.
Material grade — premium products cost more but often last longer.
Labor rates — local wages and demand swing installed prices significantly.
Region — prices vary by state and metro (see local cost pages below).

Estimates are guidance only — get quotes from local insulation pros in California. See the national cost breakdown →