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.
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.
Find your local cost answer
Popular radon mitigation cost searches
If the search started with one of these questions, this page should answer it fast and move the visitor to the right local calculator or guide.
How much does radon mitigation cost?
Start with $900-$1550, then use ZIP lookup because labor, permits, and routing change the real quote.
Use local calculator →Basement vs slab vs crawl-space radon system cost
Foundation type is one of the biggest quote drivers because it changes suction path, sealing work, and access.
Compare foundations →Radon mitigation cost for 4.0+ pCi/L
At 4.0 pCi/L and above, the cost question usually becomes an action plan, not a someday estimate.
See urgency table →Radon mitigation cost after failed inspection
Use the local range to shape a repair request, seller credit, or quick-close fallback before negotiation starts.
Calculate seller credit →Choose your next step
Start from the exact job, not another generic radon article.
Pick the situation that matches your home. Each route keeps the reading, deal side, or foundation clue attached so the next page answers the search instead of resetting the user.
Failed inspection
I need a repair or seller credit number
Open the local credit path with a 4.0+ buyer scenario already selected.
Open negotiation route4.0+ pCi/L
I have a high result and need the cost path
Go straight to the county estimate, quote context, and contractor checklist.
Open cost route2.0-3.9 pCi/L
I need to know if this number is bad
Use the level explanation first, then decide whether to retest, monitor, or price mitigation.
Open level routeNo test yet
I need the first valid result
Start with kit placement, timing, closed-house conditions, and result interpretation.
Open testing routeOfficial cost evidence index
Evidence-backed radon mitigation cost pages
Open cost pages that have a real reason to exist: demand, official radon evidence, or both.
The cost directory follows the same eligibility rule as the county cost pages themselves. State hubs, sitemap candidates, and internal links point at pages Google can actually index.
7
Cost pages
7
Evidence backed
7
Measured
1
Local guides
State crawl routes
Open these state cost hubs first
OH Focused set
OH has 2 indexable cost counties, including 2 with measured radon evidence behind the cost path.
2 evidence-backed, 2 measured
CO Focused set
CO has 1 indexable cost counties, including 1 with measured radon evidence behind the cost path.
1 evidence-backed, 1 measured
MA Focused set
MA has 1 indexable cost counties, including 1 with measured radon evidence behind the cost path.
1 evidence-backed, 1 measured
MN Focused set
MN has 1 indexable cost counties, including 1 with measured radon evidence behind the cost path.
1 evidence-backed, 1 measured
NC Focused set
NC has 1 indexable cost counties, including 1 with measured radon evidence behind the cost path.
1 evidence-backed, 1 measured
UT Focused set
UT has 1 indexable cost counties, including 1 with measured radon evidence behind the cost path.
1 evidence-backed, 1 measured
County first clicks
Highest-signal cost pages
Plymouth County, MA
Cost eligible local evidence
$1000-$1770
CDC EPHT Network Radon Tests from Labs: 17% 4.0+
Plymouth County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 17% 4.0+ with a local housing base of 215,021 units and a modeled planning range of $1000-$1770.
EPA Zone 2 - 215,021 housing units - score 100
Utah County, UT
Cost eligible local evidence
$910-$1617
Utah EPHT Radon Test Kit Results: 43.1% 4.0+
Utah County is a strong cost page because it pairs Utah EPHT Radon Test Kit Results: 43.1% 4.0+ with a local housing base of 195,342 units and a modeled planning range of $910-$1617.
EPA Zone 2 - 195,342 housing units - score 100
Delaware County, OH
Cost eligible local evidence
$960-$1732
CDC EPHT Network Radon Tests from Labs: 72.2% 4.0+
Delaware County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 72.2% 4.0+ with a local housing base of 82,131 units and a modeled planning range of $960-$1732.
EPA Zone 1 - 82,131 housing units - score 100
Medina County, OH
Cost eligible local evidence
$960-$1732
CDC EPHT Network Radon Tests from Labs: 43.4% 4.0+
Medina County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 43.4% 4.0+ with a local housing base of 75,138 units and a modeled planning range of $960-$1732.
EPA Zone 2 - 75,138 housing units - score 100
Mesa County, CO
Demand cohort local evidence
$950-$1685
Colorado EPHT radon tests: 33.6% 4.0+
Mesa County is a strong cost page because it pairs Colorado EPHT radon tests: 33.6% 4.0+ with a local housing base of 67,708 units and a modeled planning range of $950-$1685.
EPA Zone 1 - 67,708 housing units - score 100
Douglas County, MN
Cost eligible local evidence
$1010-$1817
Minnesota Health Dept. Indoor Air Unit Radon Test Data: 61.6% 4.0+
Douglas County is a strong cost page because it pairs Minnesota Health Dept. Indoor Air Unit Radon Test Data: 61.6% 4.0+ with a local housing base of 21,881 units and a modeled planning range of $1010-$1817.
EPA Zone 1 - 21,881 housing units - score 100
Transylvania County, NC
Cost eligible local evidence
$875-$1558
North Carolina DHHS Radon Data Map: 305 pCi/L high-end
Transylvania County is a strong cost page because it pairs North Carolina DHHS Radon Data Map: 305 pCi/L high-end with a local housing base of 19,072 units and a modeled planning range of $875-$1558.
EPA Zone 1 - 19,072 housing units - score 73
Foundation Type
Basement, slab, and crawl-space cost ranges
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
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.
Observed pricing layer
Got a real quote, paid install, or seller credit?
Add one anonymized quote signal. Public data explains risk; observed quotes help RadonVerdict sharpen real county pricing.
State Directory
Browse radon mitigation cost by state
Open a state, then choose the county for local pricing.
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.
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
- EPA Map of Radon Zones (retrieved 2026-02-21)
- EPA A Citizen's Guide to Radon (retrieved 2026-05-05)
- CDC Environmental Public Health Tracking - Radon Testing (retrieved 2026-05-05)
- Angi Radon Mitigation Cost Guide (retrieved 2026-02-21)