The average cost to insulate an attic is between $1 and $7 per square foot including materials and varies depending on the insulation type and square footage. How Much Does Attic Insulation Cost? Attic insulation costs between $1,500 and $3,500, with a national average of about $2,500. Learn about the costs to add more attic insulation for better energy efficiency.
We cover the types of insulation, R. The basic cost to Insulate an Attic is $3.59 - $7.40 per square foot in January 2026, but can vary significantly with site conditions and options. Use our free HOMEWYSE CALCULATOR to estimate fair costs for your SPECIFIC project.
See typical tasks and time to insulate an attic, along with per unit costs and material requirements. See professionally prepared estimates for attic insulation work. The average cost to insulate an attic typically ranges between $1,500 and $3,500, depending on various factors.
Attic insulation cost per square foot can vary significantly, roughly from 0.50$ - +7$ per square foot, with materials like fiberglass, spray foam insulation, and cellulose insulation having different pricing structures. This guide breaks down the cost to insulate an attic in the United States, with clear low-average-high ranges and per-unit estimates to help plan a budget. The main cost drivers are material choice (fiberglass, mineral wool, spray foam), attic accessibility, existing insulation, and whether ventilation or air sealing is needed.
On average, attic insulation costs between $1,700 and $2,500, with most homeowners spending an average of $2,100. The per-square-foot cost of insulation ranges from $1 to $3. Location, attic size, and insulation type can significantly affect the total project cost.
Quality insulation enhances energy efficiency, reduces utility bills, and boosts year. Attic insulation costs $1 to $4 per square foot installed, depending on the type and R-value. The average cost to insulate an attic is $1,000 to $2,700.
Current pricing breakdown for attic insulation projects, including national averages, typical cost ranges, and per-square-foot installation rates in 2025. National Cost Overview Homeowners can expect to pay an average of $2,380 for attic insulation in 2025, with most projects falling within the typical range of $1,680 to $3,125. In 2025, the average cost of attic insulation ranges from $1,800 to $5,000, depending on the type of material, attic size, and labor costs in your area.
While it may feel like a significant upfront expense, insulation can save homeowners 15% to 30% on annual heating and cooling bills, making it a long.
