Maryland 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 MD 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
Maryland 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
Maryland requires sellers to disclose environmental hazards including radon through the Residential Property Disclosure and Disclaimer Statement.
Credential note
Maryland does not require specific radon licensing but recommends NRPP or AARST-certified professionals.
MD Cost Starting Point
Maryland cost range by foundation
Basement
$975-$1727
Use this when the home has a basement or lowest-level slab that supports a standard sub-slab suction system.
Slab-on-Grade
$918-$1612
Slab homes can price differently when finished space, routing, or core drilling complicates the system path.
Crawl Space
$1490-$2700
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. Maryland requires sellers to disclose environmental hazards including radon through the Residential Property Disclosure and Disclaimer Statement.
Mitigation licensing: No state-specific mitigation license premium is modeled. Maryland does not require specific radon licensing but recommends NRPP or AARST-certified professionals.
EPA zone mix in Maryland
8
Zone 1
8
Zone 2
8
Zone 3
24 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
Maryland 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.
24
Listed
24
Evidence
24
Measured
Best county pages to open first
Montgomery County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 18% 4.0+
Montgomery County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 18% 4.0+ with a local housing base of 403,643 units and a modeled planning range of $975-$1727.
Prince George's County
Demand cohort local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 19% 4.0+
Prince George's County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 19% 4.0+ with a local housing base of 359,176 units and a modeled planning range of $975-$1727.
Baltimore County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 19.1% 4.0+
Baltimore 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 349,471 units and a modeled planning range of $975-$1727.
Baltimore
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 7.9% 4.0+
Baltimore is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 7.9% 4.0+ with a local housing base of 293,555 units and a modeled planning range of $975-$1727.
Anne Arundel County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 17.4% 4.0+
Anne Arundel 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 233,163 units and a modeled planning range of $975-$1727.
Howard County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 30.8% 4.0+
Howard County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 30.8% 4.0+ with a local housing base of 123,428 units and a modeled planning range of $975-$1727.
Frederick County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 28.1% 4.0+
Frederick County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 28.1% 4.0+ with a local housing base of 104,217 units and a modeled planning range of $975-$1727.
Harford County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 22.6% 4.0+
Harford County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 22.6% 4.0+ with a local housing base of 103,552 units and a modeled planning range of $975-$1727.
Carroll County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 41.9% 4.0+
Carroll County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 41.9% 4.0+ with a local housing base of 65,804 units and a modeled planning range of $975-$1727.
Washington County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 56% 4.0+
Washington County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 56% 4.0+ with a local housing base of 63,701 units and a modeled planning range of $975-$1727.
Charles County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 24.1% 4.0+
Charles County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 24.1% 4.0+ with a local housing base of 62,362 units and a modeled planning range of $975-$1727.
St. Mary's County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 20.9% 4.0+
St. Mary's County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 20.9% 4.0+ with a local housing base of 45,665 units and a modeled planning range of $975-$1727.
Cecil County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 24.9% 4.0+
Cecil County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 24.9% 4.0+ with a local housing base of 43,957 units and a modeled planning range of $975-$1727.
Calvert County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 30.2% 4.0+
Calvert County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 30.2% 4.0+ with a local housing base of 35,749 units and a modeled planning range of $975-$1727.
Allegany County
Evidence-backed local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 35.7% 4.0+
Allegany County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 35.7% 4.0+ with a local housing base of 32,882 units and a modeled planning range of $975-$1727.
Garrett County
Cost eligible local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 37.4% 4.0+
Garrett County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 37.4% 4.0+ with a local housing base of 18,501 units and a modeled planning range of $975-$1727.
Kent County
Cost eligible local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 52.6% 4.0+
Kent County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 52.6% 4.0+ with a local housing base of 10,320 units and a modeled planning range of $975-$1727.
Queen Anne's County
Cost eligible local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 16.9% 4.0+
Queen Anne's County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 16.9% 4.0+ with a local housing base of 21,405 units and a modeled planning range of $975-$1727.
Talbot County
Cost eligible local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 7.7% 4.0+
Talbot County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 7.7% 4.0+ with a local housing base of 19,606 units and a modeled planning range of $975-$1727.
Worcester County
Cost eligible local evidence
$975-$1727
CDC EPHT Network Radon Tests from Labs: 0% 4.0+
Worcester County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 0% 4.0+ with a local housing base of 56,399 units and a modeled planning range of $975-$1727.
County estimates
Open a Maryland 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 Maryland?
Price ranges across Maryland 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.