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.
3126
Cost pages
3040
Evidence backed
3019
Measured
102
Local guides
State crawl routes
Open these state cost hubs first
TX Start here
TX has 254 indexable cost counties, including 254 with measured radon evidence behind the cost path.
254 evidence-backed, 254 measured
GA Start here
GA has 159 indexable cost counties, including 159 with measured radon evidence behind the cost path.
159 evidence-backed, 159 measured
VA Start here
VA has 133 indexable cost counties, including 133 with measured radon evidence behind the cost path.
133 evidence-backed, 133 measured
KY Start here
KY has 120 indexable cost counties, including 120 with measured radon evidence behind the cost path.
120 evidence-backed, 120 measured
MO Start here
MO has 115 indexable cost counties, including 115 with measured radon evidence behind the cost path.
115 evidence-backed, 115 measured
KS Start here
KS has 105 indexable cost counties, including 105 with measured radon evidence behind the cost path.
105 evidence-backed, 105 measured
IL Start here
IL has 102 indexable cost counties, including 102 with measured radon evidence behind the cost path.
102 evidence-backed, 102 measured
NC Start here
NC has 100 indexable cost counties, including 100 with measured radon evidence behind the cost path.
100 evidence-backed, 100 measured
IA Start here
IA has 99 indexable cost counties, including 99 with measured radon evidence behind the cost path.
99 evidence-backed, 99 measured
TN Start here
TN has 95 indexable cost counties, including 95 with measured radon evidence behind the cost path.
95 evidence-backed, 95 measured
County first clicks
Highest-signal cost pages
Los Angeles County, CA
Demand cohort local evidence
$1050-$1855
CDC EPHT Network Radon Tests from Labs: 9.5% 4.0+
Los Angeles County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 9.5% 4.0+ with a local housing base of 3,599,561 units and a modeled planning range of $1050-$1855.
EPA Zone 2 - 3,599,561 housing units - score 100
Cook County, IL
Evidence-backed local evidence
$1040-$1868
Illinois IEMA-OHS Licensed Radon Measurement Dashboard: 20.6% 4.0+
Cook County is a strong cost page because it pairs Illinois IEMA-OHS Licensed Radon Measurement Dashboard: 20.6% 4.0+ with a local housing base of 2,261,319 units and a modeled planning range of $1040-$1868.
EPA Zone 2 - 2,261,319 housing units - score 100
Maricopa County, AZ
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 17.4% 4.0+
Maricopa County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 17.4% 4.0+ with a local housing base of 1,821,463 units and a modeled planning range of $925-$1643.
EPA Zone 2 - 1,821,463 housing units - score 100
Kings County, NY
Evidence-backed local evidence
$1025-$1813
New York State Health Dept. Residential Radon Test Data: 29.7% 4.0+
Kings County is a strong cost page because it pairs New York State Health Dept. Residential Radon Test Data: 29.7% 4.0+ with a local housing base of 1,079,551 units and a modeled planning range of $1025-$1813.
EPA Zone 3 - 1,079,551 housing units - score 100
Miami-Dade County, FL
Demand cohort local evidence
$910-$1617
CDC EPHT Network Radon Tests from Labs: 19.1% 4.0+
Miami-Dade County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 19.1% 4.0+ with a local housing base of 1,075,278 units and a modeled planning range of $910-$1617.
EPA Zone 2 - 1,075,278 housing units - score 100
Dallas County, TX
Evidence-backed local evidence
$890-$1583
CDC EPHT Network Radon Tests from Labs: 8.4% 4.0+
Dallas County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 8.4% 4.0+ with a local housing base of 1,040,669 units and a modeled planning range of $890-$1583.
EPA Zone 3 - 1,040,669 housing units - score 100
Clark County, NV
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 8.1% 4.0+
Clark County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 8.1% 4.0+ with a local housing base of 923,275 units and a modeled planning range of $925-$1643.
EPA Zone 3 - 923,275 housing units - score 100
New York County, NY
Evidence-backed local evidence
$1025-$1813
New York State Health Dept. Residential Radon Test Data: 21.9% 4.0+
New York County is a strong cost page because it pairs New York State Health Dept. Residential Radon Test Data: 21.9% 4.0+ with a local housing base of 913,058 units and a modeled planning range of $1025-$1813.
EPA Zone 3 - 913,058 housing units - score 100
Riverside County, CA
Evidence-backed local evidence
$1050-$1855
CDC EPHT Network Radon Tests from Labs: 1.3% 4.0+
Riverside County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 1.3% 4.0+ with a local housing base of 851,646 units and a modeled planning range of $1050-$1855.
EPA Zone 2 - 851,646 housing units - score 100
Tarrant County, TX
Evidence-backed local evidence
$890-$1583
CDC EPHT Network Radon Tests from Labs: 13% 4.0+
Tarrant County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 13% 4.0+ with a local housing base of 812,186 units and a modeled planning range of $890-$1583.
EPA Zone 3 - 812,186 housing units - score 100
Wayne County, MI
Evidence-backed local evidence
$875-$1558
CDC EPHT Network Radon Tests from Labs: 17.5% 4.0+
Wayne County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 17.5% 4.0+ with a local housing base of 792,169 units and a modeled planning range of $875-$1558.
EPA Zone 3 - 792,169 housing units - score 100
San Bernardino County, CA
Evidence-backed local evidence
$1050-$1855
CDC EPHT Network Radon Tests from Labs: 4.5% 4.0+
San Bernardino County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 4.5% 4.0+ with a local housing base of 733,104 units and a modeled planning range of $1050-$1855.
EPA Zone 2 - 733,104 housing units - score 100
Philadelphia County, PA
Evidence-backed local evidence
$1010-$1817
CDC EPHT Network Radon Tests from Labs: 12.4% 4.0+
Philadelphia County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 12.4% 4.0+ with a local housing base of 730,630 units and a modeled planning range of $1010-$1817.
EPA Zone 3 - 730,630 housing units - score 100
Santa Clara County, CA
Demand cohort local evidence
$1050-$1855
CDC EPHT Network Radon Tests from Labs: 9.2% 4.0+
Santa Clara County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 9.2% 4.0+ with a local housing base of 688,287 units and a modeled planning range of $1050-$1855.
EPA Zone 2 - 688,287 housing units - score 100
Middlesex County, MA
Evidence-backed local evidence
$1000-$1770
CDC EPHT Network Radon Tests from Labs: 22% 4.0+
Middlesex County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 22% 4.0+ with a local housing base of 658,555 units and a modeled planning range of $1000-$1770.
EPA Zone 1 - 658,555 housing units - score 100
Alameda County, CA
Evidence-backed local evidence
$1050-$1855
CDC EPHT Network Radon Tests from Labs: 6.7% 4.0+
Alameda County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 6.7% 4.0+ with a local housing base of 622,856 units and a modeled planning range of $1050-$1855.
EPA Zone 2 - 622,856 housing units - score 100
Cuyahoga County, OH
Evidence-backed local evidence
$960-$1732
CDC EPHT Network Radon Tests from Labs: 21.7% 4.0+
Cuyahoga County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 21.7% 4.0+ with a local housing base of 615,881 units and a modeled planning range of $960-$1732.
EPA Zone 2 - 615,881 housing units - score 100
Hillsborough, FL
Demand cohort local evidence
$910-$1617
CDC EPHT Network Radon Tests from Labs: 18.1% 4.0+
Hillsborough is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 18.1% 4.0+ with a local housing base of 606,334 units and a modeled planning range of $910-$1617.
EPA Zone 2 - 606,334 housing units - score 100
Allegheny County, PA
Evidence-backed local evidence
$1010-$1817
Pennsylvania DEP Radon Test Data by ZIP Code: 5.2 pCi/L average
Allegheny County is a strong cost page because it pairs Pennsylvania DEP Radon Test Data by ZIP Code: 5.2 pCi/L average with a local housing base of 602,734 units and a modeled planning range of $1010-$1817.
EPA Zone 1 - 602,734 housing units - score 100
Franklin County, OH
Evidence-backed local evidence
$960-$1732
CDC EPHT Network Radon Tests from Labs: 71.9% 4.0+
Franklin County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 71.9% 4.0+ with a local housing base of 582,701 units and a modeled planning range of $960-$1732.
EPA Zone 1 - 582,701 housing units - score 100
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)