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Washington radon mitigation pricing per system

Radon Mitigation cost per system in Washington, District of Columbia in 2026.

Low

$1,150

Average

$2,200

High

$3,250

Washington crews quote about $1,150 – $3,250 per system.

Multiply local unit rates by your real measurements.

What drives radon mitigation prices in Washington

Local labor, permitting and climate move Washington prices away from the national average.

Labor market

Licensed trade labor in Washington runs about 130% of the national average, and the best crews book out fastest in spring and early summer.

Permits

Most Washington, DC projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not.

Climate

District of Columbia weather drives material choices here, so ask contractors what they install most often in Washington and why.

Washington unit pricing by material

Single-point sub-slab system$1,350 – $1,900
Sub-slab with sealing$1,900 – $2,500
Crawlspace membrane system$2,500 – $3,200
Multi-point system with monitoring$3,200 – $4,400

Ways to lower your Washington price

  • Test first with a $20 kit before commissioning a system.
  • Route the pipe on the least visible elevation to skip cosmetic upgrades.
  • Collect three written bids on an identical scope — spreads of 20–40% are normal.
  • Book in the off-season and stay flexible on the start date to save 5–15%.
  • Bundle nearby work into one mobilization so you only pay setup and travel once.
  • Ask what the contractor would change to cut 10% without hurting durability.

Washington questions

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