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RadonVerdict

Cost Parent Guide

Radon Mitigation Cost by State, Foundation Type, and Test Result

Most homeowners need one answer first: what is a realistic budget before calling contractors? Start with the national range, then jump to your ZIP or state for local county pricing.

Use ZIP Cost Calculator Browse Costs by State

National Planning Range

Typical standard setup

$900-$1550

Average planning number: $1225. County pages adjust this for state rules, local labor, foundation, and project complexity.

Foundation Type

Basement, slab, and crawl-space cost ranges

How the model works

Basement

$900-$1600

Usually the cleanest pricing path when sub-slab suction is straightforward and routing is not unusually complex.

Slab-on-grade

$850-$1500

Often similar to basement pricing, but routing, floor penetrations, and finished-space constraints can move the quote.

Crawl space

$1400-$2550

Usually higher when vapor-barrier sealing, sub-membrane suction, or access constraints add labor and material.

Test Result

When the cost question becomes urgent

Reading
Cost urgency
Best next step
No test yet
Do not start with contractor quotes. A valid test result changes the whole decision.
Run a short-term test first.
2.0-3.9
Borderline. Pricing may be useful for planning, but retesting or long-term monitoring may come first.
Interpret the radon level, then decide whether to price reduction.
4.0+
This is where mitigation pricing becomes practical and time-sensitive.
Use ZIP lookup to open your local cost page.
8.0+
High reading. Waiting usually creates more health risk and more real-estate friction.
Prioritize local quotes and, in a deal, convert the range into a repair or credit ask.

Fastest local path

ZIP Cost Calculator

Open the county estimate matched to the property ZIP and situation.

Real-estate deal

Seller Credit Calculator

Turn a local range into an opening ask, ceiling, or quick-close fallback.

Need meaning first?

2.0 vs 4.0 vs 8.0 pCi/L

Understand the test result before you decide how much pricing work is worth doing.

State Directory

Browse radon mitigation cost by state

Open a state, then choose the county for local pricing.

AK 2 counties AL 15 counties AR 2 counties AZ 9 counties CA 19 counties CO 25 counties DE 1 counties FL 7 counties GA 14 counties IA 29 counties ID 9 counties IL 39 counties IN 48 counties KS 14 counties KY 19 counties MA 10 counties MD 12 counties ME 12 counties MI 15 counties MN 34 counties MO 12 counties MT 10 counties NC 12 counties ND 8 counties NE 10 counties NH 6 counties NJ 17 counties NM 7 counties NV 4 counties NY 42 counties OH 63 counties OR 2 counties PA 50 counties RI 3 counties SC 5 counties SD 6 counties TN 31 counties TX 2 counties UT 7 counties VA 45 counties VT 1 counties WA 6 counties WI 30 counties WV 12 counties WY 9 counties

Sources and estimate limits

These are planning estimates, not contractor bids. The model uses RadonVerdict's pricing configuration, foundation assumptions, regional multipliers, and state-rule context. Real quotes can change with access, routing, fan size, roofline, crawl-space sealing, permits, and contractor availability.

RadonVerdict methodology Radon level guide EPA radon resources

Editorial and Data Transparency

Author
RadonVerdict Data Team (Public Data and Cost Modeling)
Content Review
Source-level dates shown below
Data Retrieved At
Source-level dates below

Primary Sources