Radon Mitigation Cost Estimator: Scope, Not a Guess
Score the things that actually move a radon quote, so you know whether your job is simple or complex before contractors arrive.
This tool deliberately does not produce a price. Radon quotes depend on what is under your slab, and no calculator can see that. What it does instead is score the five factors that genuinely move the number, so you can tell whether to expect the simple or the complex end of local quotes.
When this tool helps most
Use it after a confirmed high radon result and before you collect quotes, so you can tell a reasonable bid from an outlier.
How to use this tool
- Pick your foundation type, since crawl spaces and mixed foundations cost more.
- Enter the number of suction points your contractor expects, which is the biggest single driver.
- Choose interior or exterior pipe routing.
- Say how finished the basement is, because concealment and making-good add labour.
- Note whether a new electrical circuit is needed.
Worked example
A full basement with one suction point, exterior routing, unfinished, with no new circuit needed, scores 1 and sits at the simple end. Add a crawl space, three suction points and a fully finished space and the score rises into the complex end, which tells you to expect quotes well above the typical range.
Understanding your results
The output is a complexity band plus the list of drivers your answers identified. It also shows the published Fixr reference figures with their real scope stated, because that widely quoted range covers testing and passive depressurization rather than mitigation alone.
Common mistakes to avoid
- Comparing a one-point quote with a three-point quote on price alone.
- Treating a published national average as a price for your house.
- Accepting a quote with no diagnostic visit, which means the suction point count is a guess.
- Leaving the post-installation test out to save money, which removes the proof you are buying.
How to get the most accurate result
- Measure your own basement or crawl space with a tape measure instead of using typical sizes.
- Use the numbers printed on your product labels, manuals and data sheets.
- Change one input at a time to see which assumption matters most.
- Print or save the result and bring it to your installer or contractor.
Next steps
Read what the work involves in our radon mitigation system guide, then compare quotes against the cost guide.
Frequently asked questions
Because an honest one is not possible without a diagnostic visit. Publishing invented cost multipliers would look precise and be wrong. The number of suction points, which depends on how freely air moves under your slab. Clean gravel spreads suction a long way; compacted clay does not. CDC advises contacting a qualified professional to install a radon reduction system when your level is at or above 4 pCi/L.Why does it not give me a price?
What is the biggest cost driver?
When should I call someone?
This tool is for planning and education only. It does not store your entries. Structural judgement belongs to a licensed structural engineer, radon mitigation design to a certified mitigator, and mold over roughly 10 square feet to a remediation professional. New circuits are a job for a licensed electrician. Read our disclaimer.