Basic
$1.02 – $2.33 per sq ft
Unfaced R-21 high-density fiberglass batts friction-fit in 2x6 walls, vapor retarder where code requires
How Much Does R21 Insulation Cost in Boston, Massachusetts?
Supply and install R-21 high-density fiberglass batt insulation in 2x6 exterior wall cavities.
R21 Insulation in Boston, Massachusetts typically costs $1.20 to $2.74 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
R21 Insulation in Boston, Massachusetts
$1.20 – $2.74
per sq ftPrices in Boston are 14.0% higher than the national average for r21 insulation.
National average: $1.10 – $2.50 per sq ft
What you get at each price level
Standard
$1.20 – $2.74 per sq ft
Kraft-faced R-21 high-density batts stapled to studs, split around wiring and cut tight around boxes and pipes
Premium
$1.50 – $3.42 per sq ft
Formaldehyde-free R-21 high-density batts fitted tight without gaps, split around wiring, cut tight at boxes and pipes, window gaps filled
Cost Breakdown in Boston
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.50 – $1.12 | sq ft |
| Labor | labor | $0.48 – $1.12 | sq ft |
| Supplies & Other | supplies | $0.13 – $0.30 | sq ft |
| Equipment & Disposal | equipment | $0.09 – $0.20 | sq ft |
Prices adjusted for Boston local market conditions.
Cost Factors in Boston, Massachusetts
What Affects Pricing
- Materials ($0.50-$1.12 per square foot)
- Labor ($0.38-$0.88 per square foot)
- Supplies & Other ($0.13-$0.30 per square foot)
- Equipment & Disposal ($0.09-$0.20 per square foot)
Local Price Adjustments
Material costsAt national average
Labor costs27.0% above avg
Labor costs in Boston run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
References
- Insulation Installation Cost Per Sq Ft (2026), EZ-Estimates, ez-estimates.com, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Boston
Connect with local r21 insulation contractors in Boston for personalized quotes based on your specific project.