Basic
$1.33 – $3.11 per sq ft
Acoustic mineral wool batts sized for the cavity, friction-fit between framing members

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Acoustic mineral-wool (e.g. Safe'n'Sound) insulation installed in open wall/ceiling cavities; drywall and decoupling extra.
Soundproof Insulation in Washington, District of Columbia typically costs $1.57 to $3.66 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Washington are 5.0% higher than the national average for soundproof insulation.
National average: $1.50 – $3.50 per sq ft
$1.33 – $3.11 per sq ft
Acoustic mineral wool batts sized for the cavity, friction-fit between framing members
$1.57 – $3.66 per sq ft
Acoustic mineral wool batts cut tight around boxes and pipes, gaps at plates sealed with acoustic sealant
$1.96 – $4.58 per sq ft
Acoustic mineral wool batts fitted tight, acoustic sealant at plates and penetrations, putty pads on electrical boxes
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.72 – $1.66 | sq ft |
| Labor | labor | $0.53 – $1.27 | sq ft |
| Supplies & Other | supplies | $0.19 – $0.44 | sq ft |
| Equipment & Disposal | equipment | $0.13 – $0.29 | sq ft |
Connect with local soundproof insulation contractors in Washington for personalized quotes based on your specific project.