Basic
$3.90 – $5.71 per sq ft
2 in. XPS rigid foam (about R-10) on foundation walls, seams taped, rim joists insulated with cut foam, ready for code covering
How Much Does Insulate Basement Cost in Washington, District of Columbia?
Insulate Basement: national installed price range, materials and labor breakdown, and local pricing by ZIP code.
Insulate Basement in Washington, District of Columbia typically costs $4.58 to $6.72 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Insulate Basement in Washington, District of Columbia
$4.58 – $6.72
per sq ftPrices in Washington are 5.0% higher than the national average for insulate basement.
National average: $4.38 – $6.42 per sq ft
What you get at each price level
Standard
$4.58 – $6.72 per sq ft
2 in. XPS rigid foam (about R-10) on foundation walls, seams taped, rim joists foamed in place, ready for code covering
Premium
$5.73 – $8.40 per sq ft
2 in. XPS rigid foam (about R-10) on foundation walls, seams taped, top and bottom edges foam-sealed, rim joists foamed in place
Cost Breakdown in Washington
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $2.07 – $3.03 | sq ft |
| Labor | labor | $1.59 – $2.34 | sq ft |
| Supplies & Other | supplies | $0.56 – $0.81 | sq ft |
| Equipment & Disposal | equipment | $0.37 – $0.54 | sq ft |
Prices adjusted for Washington local market conditions.
Cost Factors in Washington, District of Columbia
What Affects Pricing
- Materials ($1.97-$2.89 per square foot)
- Labor ($1.53-$2.25 per square foot)
- Supplies & Other ($4.38-$6.42 per square foot)
- Equipment & Disposal ($4.38-$6.42 per square foot)
Local Price Adjustments
Material costs5.0% above avg
Labor costs4.0% above avg
Frequently Asked Questions
How we price this
BuildX Pro researches and reviews the national price range for Insulate Basement, then adjusts it to your ZIP code for local labor and material costs using the public data below. Last checked Sep 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 Washington
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