Whole-Home Radon Mitigation Payback Calculator

Combine upfront mitigation cost, incremental fan energy, resale premium, and expected holding period to understand when a radon system pays for itself and how much equity it adds when you eventually sell or refinance.

Include fan, piping, labor, permits, diagnostics, and post-mitigation testing.
Positive values add utility expense; enter a negative number if the fan saves energy or improves HVAC efficiency.
Estimated sale premium once documentation shows post-mitigation radon levels below local action thresholds.
Ownership horizon before you sell or refinance the property.

Consult local mitigation contractors and real estate professionals for market-specific pricing and resale impacts. Results are estimates only.

Examples

  • $1,650 install, $9 monthly energy, $7,500 resale premium, 6-year horizon ⇒ Simple payback 1.44 years, energy impact $648.00 over the horizon, net value at sale $5,202.00.
  • $2,200 install, $6 monthly energy, $4,000 premium, 4-year horizon ⇒ Simple payback 2.37 years, energy impact $288.00 over the horizon, net value at sale $1,512.00.

FAQ

How do post-mitigation radon tests affect the calculation?

If tests show levels above 4.0 pCi/L, reduce the resale premium input because buyers may still request concessions.

Can I add maintenance costs?

Add annual maintenance to the monthly energy field by converting it into a monthly equivalent or subtracting it from the resale premium before running the calculation.

What if I plan to keep the home indefinitely?

Increase the years input to explore long-term ownership. If annual benefit remains positive, the payback period stays constant regardless of the final sale date.

Does the calculator account for health benefits?

Health risk reduction is not monetized directly. Consider the intangible benefit alongside the financial output when making a decision.

Additional Information

  • Monthly energy impact multiplies across the ownership horizon; enter a negative number if a sealed system improves HVAC efficiency.
  • Resale premium should reflect comparable sales in your market after mitigation is documented and radon tests show <4.0 pCi/L.
  • Simple payback ignores financing costs and tax credits; add them manually if applicable.
  • Net value assumes the premium is realized in a lump sum at the time of sale.

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