Colorado 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 CO 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
Colorado 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
Colorado requires sellers to provide the Seller's Property Disclosure form, which includes radon. Colorado has some of the highest radon levels in the nation due to its geology.
Credential note
Colorado does not require state licensing but strongly recommends using NRPP or AARST-certified professionals.
CO Cost Starting Point
Colorado cost range by foundation
Basement
$950-$1685
Use this when the home has a basement or lowest-level slab that supports a standard sub-slab suction system.
Slab-on-Grade
$895-$1575
Slab homes can price differently when finished space, routing, or core drilling complicates the system path.
Crawl Space
$1460-$2650
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. Colorado requires sellers to provide the Seller's Property Disclosure form, which includes radon. Colorado has some of the highest radon levels in the nation due to its geology.
Mitigation licensing: No state-specific mitigation license premium is modeled. Colorado does not require state licensing but strongly recommends using NRPP or AARST-certified professionals.
EPA zone mix in Colorado
52
Zone 1
12
Zone 2
0
Zone 3
64 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
Colorado 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.
64
Listed
64
Evidence
64
Measured
Best county pages to open first
Denver County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 39.6% 4.0+
Denver County is a strong cost page because it pairs Colorado EPHT radon tests: 39.6% 4.0+ with a local housing base of 344,760 units and a modeled planning range of $950-$1685.
El Paso County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 39.5% 4.0+
El Paso County is a strong cost page because it pairs Colorado EPHT radon tests: 39.5% 4.0+ with a local housing base of 289,809 units and a modeled planning range of $950-$1685.
Arapahoe County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 48.4% 4.0+
Arapahoe County is a strong cost page because it pairs Colorado EPHT radon tests: 48.4% 4.0+ with a local housing base of 262,688 units and a modeled planning range of $950-$1685.
Jefferson County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 50.8% 4.0+
Jefferson County is a strong cost page because it pairs Colorado EPHT radon tests: 50.8% 4.0+ with a local housing base of 248,785 units and a modeled planning range of $950-$1685.
Adams County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 46.8% 4.0+
Adams County is a strong cost page because it pairs Colorado EPHT radon tests: 46.8% 4.0+ with a local housing base of 187,811 units and a modeled planning range of $950-$1685.
Larimer County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 54.9% 4.0+
Larimer County is a strong cost page because it pairs Colorado EPHT radon tests: 54.9% 4.0+ with a local housing base of 159,083 units and a modeled planning range of $950-$1685.
Boulder County
Demand cohort local evidence
$950-$1685
Colorado EPHT radon tests: 43.8% 4.0+
Boulder County is a strong cost page because it pairs Colorado EPHT radon tests: 43.8% 4.0+ with a local housing base of 141,007 units and a modeled planning range of $950-$1685.
Douglas County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 47.1% 4.0+
Douglas County is a strong cost page because it pairs Colorado EPHT radon tests: 47.1% 4.0+ with a local housing base of 136,554 units and a modeled planning range of $950-$1685.
Weld County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 49.2% 4.0+
Weld County is a strong cost page because it pairs Colorado EPHT radon tests: 49.2% 4.0+ with a local housing base of 120,293 units and a modeled planning range of $950-$1685.
Pueblo County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 63.8% 4.0+
Pueblo County is a strong cost page because it pairs Colorado EPHT radon tests: 63.8% 4.0+ with a local housing base of 72,364 units and a modeled planning range of $950-$1685.
Mesa County
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.
Eagle County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 45% 4.0+
Eagle County is a strong cost page because it pairs Colorado EPHT radon tests: 45% 4.0+ with a local housing base of 33,054 units and a modeled planning range of $950-$1685.
Summit County
Evidence-backed local evidence
$950-$1685
Colorado EPHT radon tests: 46.4% 4.0+
Summit County is a strong cost page because it pairs Colorado EPHT radon tests: 46.4% 4.0+ with a local housing base of 31,508 units and a modeled planning range of $950-$1685.
Broomfield County
Demand cohort local evidence
$950-$1685
Colorado EPHT radon tests: 44.3% 4.0+
Broomfield County is a strong cost page because it pairs Colorado EPHT radon tests: 44.3% 4.0+ with a local housing base of 31,338 units and a modeled planning range of $950-$1685.
La Plata County
Demand cohort local evidence
$950-$1685
Colorado EPHT radon tests: 43.5% 4.0+
La Plata County is a strong cost page because it pairs Colorado EPHT radon tests: 43.5% 4.0+ with a local housing base of 28,233 units and a modeled planning range of $950-$1685.
Garfield County
Cost eligible local evidence
$950-$1685
Colorado EPHT radon tests: 43.3% 4.0+
Garfield County is a strong cost page because it pairs Colorado EPHT radon tests: 43.3% 4.0+ with a local housing base of 24,313 units and a modeled planning range of $950-$1685.
Fremont County
Cost eligible local evidence
$950-$1685
Colorado EPHT radon tests: 53.8% 4.0+
Fremont County is a strong cost page because it pairs Colorado EPHT radon tests: 53.8% 4.0+ with a local housing base of 20,302 units and a modeled planning range of $950-$1685.
Montrose County
Cost eligible local evidence
$950-$1685
Colorado EPHT radon tests: 56.4% 4.0+
Montrose County is a strong cost page because it pairs Colorado EPHT radon tests: 56.4% 4.0+ with a local housing base of 19,122 units and a modeled planning range of $950-$1685.
Grand County
Cost eligible local evidence
$950-$1685
Colorado EPHT radon tests: 44.1% 4.0+
Grand County is a strong cost page because it pairs Colorado EPHT radon tests: 44.1% 4.0+ with a local housing base of 16,731 units and a modeled planning range of $950-$1685.
Delta County
Cost eligible local evidence
$950-$1685
Colorado EPHT radon tests: 54.9% 4.0+
Delta County is a strong cost page because it pairs Colorado EPHT radon tests: 54.9% 4.0+ with a local housing base of 14,841 units and a modeled planning range of $950-$1685.
County estimates
Open a Colorado 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 Colorado?
Price ranges across Colorado 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.