Missouri Radon Mitigation Cost by County, Foundation, and Rules
Compare typical local price ranges for basement, slab, and crawl space systems. Use the state-level ranges first, then open your county when you need a local estimate after a confirmed radon result.
Fastest Start
Use ZIP Instead of Scrolling
If you know the property ZIP, jump straight to the right county estimate instead of browsing the full state list.
Cost Basics
Foundation & Result Ranges
Use the national cost guide if you need basement, slab, crawl-space, or 4.0+ result context first.
Validate the Risk
Check MO Radon Levels
If you do not have a confirmed radon result yet, review EPA zone context before you compare mitigation pricing.
Browse Counties
Jump to County Pricing
Open your county if you already know the area and just need a local basement, slab, or crawl-space price range.
Official State Resource
Missouri radon program and rules
Use the state program link to verify local radon guidance, disclosure language, and contractor credential expectations before you act on an estimate.
Disclosure rule tracked
Missouri requires sellers to complete a Seller's Disclosure Statement, which includes known environmental hazards.
State licensing required
Missouri requires radon professionals to be licensed by the Missouri Department of Health and Senior Services.
MO Cost Starting Point
Missouri cost range by foundation
Basement
$940-$1698
Use this when the home has a basement or lowest-level slab that supports a standard sub-slab suction system.
Slab-on-Grade
$896-$1610
Slab homes can price differently when finished space, routing, or core drilling complicates the system path.
Crawl Space
$1428-$2630
Crawl-space jobs can move higher when vapor-barrier sealing, access, and sub-membrane suction add labor.
State rules that can change the quote
Disclosure: Required or commonly expected in this state context. Missouri requires sellers to complete a Seller's Disclosure Statement, which includes known environmental hazards.
Mitigation licensing: State licensing can add contractor and permit friction. Missouri requires radon professionals to be licensed by the Missouri Department of Health and Senior Services.
EPA zone mix in Missouri
11
Zone 1
97
Zone 2
7
Zone 3
115 classified counties are used for state-level risk context. EPA zones do not replace a home test, but they help explain why county pages and confirmed 4.0+ results matter before comparing quotes.
Local cost guides
Missouri evidence-backed cost route
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.
115
Listed
115
Evidence
115
Measured
Best county pages to open first
St. Louis County
Demand cohort local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 28% 4.0+
St. Louis County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 28% 4.0+ with a local housing base of 444,860 units and a modeled planning range of $940-$1698.
Jackson County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 45.2% 4.0+
Jackson County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 45.2% 4.0+ with a local housing base of 330,584 units and a modeled planning range of $940-$1698.
St. Louis
Demand cohort local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 17.6% 4.0+
St. Louis is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 17.6% 4.0+ with a local housing base of 173,792 units and a modeled planning range of $940-$1698.
St. Charles County
Demand cohort local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 29.3% 4.0+
St. Charles County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 29.3% 4.0+ with a local housing base of 161,979 units and a modeled planning range of $940-$1698.
Greene County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 27.5% 4.0+
Greene County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 27.5% 4.0+ with a local housing base of 136,889 units and a modeled planning range of $940-$1698.
Clay County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 37.5% 4.0+
Clay County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 37.5% 4.0+ with a local housing base of 105,571 units and a modeled planning range of $940-$1698.
Jefferson County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 43.3% 4.0+
Jefferson County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 43.3% 4.0+ with a local housing base of 92,590 units and a modeled planning range of $940-$1698.
Boone County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 26.7% 4.0+
Boone County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 26.7% 4.0+ with a local housing base of 80,187 units and a modeled planning range of $940-$1698.
Jasper County
Demand cohort local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 14.7% 4.0+
Jasper County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 14.7% 4.0+ with a local housing base of 53,018 units and a modeled planning range of $940-$1698.
Franklin County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 28.2% 4.0+
Franklin County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 28.2% 4.0+ with a local housing base of 45,420 units and a modeled planning range of $940-$1698.
Platte County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 42.2% 4.0+
Platte County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 42.2% 4.0+ with a local housing base of 45,378 units and a modeled planning range of $940-$1698.
Cass County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 48.2% 4.0+
Cass County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 48.2% 4.0+ with a local housing base of 44,013 units and a modeled planning range of $940-$1698.
Buchanan County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 54.3% 4.0+
Buchanan County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 54.3% 4.0+ with a local housing base of 38,368 units and a modeled planning range of $940-$1698.
Cape Girardeau County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 34.5% 4.0+
Cape Girardeau County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 34.5% 4.0+ with a local housing base of 35,506 units and a modeled planning range of $940-$1698.
Christian County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 31.7% 4.0+
Christian County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 31.7% 4.0+ with a local housing base of 35,348 units and a modeled planning range of $940-$1698.
Cole County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 24.4% 4.0+
Cole County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 24.4% 4.0+ with a local housing base of 33,304 units and a modeled planning range of $940-$1698.
Taney County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 29.1% 4.0+
Taney County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 29.1% 4.0+ with a local housing base of 29,643 units and a modeled planning range of $940-$1698.
St. Francois County
Evidence-backed local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 34% 4.0+
St. Francois County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 34% 4.0+ with a local housing base of 28,780 units and a modeled planning range of $940-$1698.
Lincoln County
Cost eligible local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 43.6% 4.0+
Lincoln County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 43.6% 4.0+ with a local housing base of 23,363 units and a modeled planning range of $940-$1698.
Nodaway County
Cost eligible local evidence
$940-$1698
Missouri DHSS Residential Radon Testing in Missouri: 33.5% 4.0+
Nodaway County is a strong cost page because it pairs Missouri DHSS Residential Radon Testing in Missouri: 33.5% 4.0+ with a local housing base of 9,465 units and a modeled planning range of $940-$1698.
County estimates
Open a Missouri county page for local pricing
County pages narrow the state range with local EPA zone context, housing data, state rules, and the foundation scenario you choose.
Why Does Cost Vary in Missouri?
Price ranges across Missouri move with local labor rates, permit friction, roofline routing, and foundation type. County pages narrow this down for homeowners comparing basement, slab, or crawl space mitigation after a confirmed radon reading.