Indoor air project budget planner
Estimate radon mitigation cost before comparing contractor quotes. Adjust foundation type, square footage, system design, suction points, fan and pipe route, sealing, testing, permits, access, labor market, and contingency.
Use this calculator for early budgeting only. It models common residential radon mitigation line items such as active sub-slab suction, drain-tile connection, crawl-space membrane work, passive-to-active upgrades, fan and pipe routing, slab sealing, post-mitigation testing, permits, access, and market pricing. Use certified testing and a qualified mitigation professional for the final design.
Start with house size, foundation conditions, and the starting radon reading from a reliable test.
Adjust suction points, fan class, pipe route, sealing, electrical, and discharge complexity.
Include post-test, permit, local labor, timing, optional monitoring, and uncertainty.
Adjust the calculator to create a mitigation quote checklist.
The estimate starts with a system-specific base and then adjusts for mitigation area, foundation type, suction points, fan class, pipe route, sealing, electrical work, discharge detail, post-test, permit, monitoring, access, labor market, timing, and contingency.
Costs rise when a home has mixed foundation sections, crawl-space membrane work, several suction points, difficult pipe routing, finished basement access, high-suction fans, panel electrical work, strict permits, or real estate rush timelines.
The EPA recommends fixing homes at 4 pCi/L or more and says homeowners may consider fixing homes between 2 and 4 pCi/L. This calculator does not test radon, diagnose health risk, or replace local guidance.
Expected cost = system base + mitigation-area allowance + suction-point allowance + fan upgrade + pipe-route adjustment + sealing allowance + electrical and discharge detail + testing + permit + monitoring + access and labor market adjustment + timing surcharge + contingency. The range widens for high radon readings, mixed foundations, crawl-space membrane systems, difficult access, and rush transactions.
Many residential projects are quoted in the low thousands, but the final price can be lower for a simple passive-to-active upgrade or higher for mixed foundations, crawl-space membranes, multiple suction points, difficult routing, permits, or rush timing.
For many slab or basement homes, an active sub-slab depressurization system is common. It uses a suction point through the slab, piping, an inline fan, and a safe exterior discharge route. The right design depends on testing, foundation, and local standards.
No. Use a reliable short-term or long-term radon test, and follow local guidance. The calculator uses the entered reading only to widen the planning range and flag urgency; it does not measure radon.
Quotes vary because contractors may include different system designs, fan models, pipe routes, sealing scope, electrical work, permits, post-tests, warranties, and cleanup. Ask for a clear line-item scope before comparing prices.
Some homeowners research DIY options, but incorrect design, discharge placement, electrical work, or sealing can leave high radon levels unresolved. For active systems, use local rules and qualified professionals, especially for real estate transactions.
Ask for system type, suction point count, fan model, pipe route, sealing scope, electrical scope, discharge location, permit responsibility, post-test plan, warranty, and what happens if the follow-up test is still high.