Arizona 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 AZ 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
Arizona 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
Arizona requires sellers to disclose all known material facts about the property, including radon test results, via the Seller's Property Disclosure Statement (SPDS).
Credential note
Arizona does not require state licensing for radon professionals. NRPP or AARST certification is recommended.
AZ Cost Starting Point
Arizona cost range by foundation
Basement
$925-$1643
Use this when the home has a basement or lowest-level slab that supports a standard sub-slab suction system.
Slab-on-Grade
$873-$1538
Slab homes can price differently when finished space, routing, or core drilling complicates the system path.
Crawl Space
$1430-$2600
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. Arizona requires sellers to disclose all known material facts about the property, including radon test results, via the Seller's Property Disclosure Statement (SPDS).
Mitigation licensing: No state-specific mitigation license premium is modeled. Arizona does not require state licensing for radon professionals. NRPP or AARST certification is recommended.
EPA zone mix in Arizona
0
Zone 1
15
Zone 2
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Zone 3
15 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
Arizona 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.
15
Listed
15
Evidence
15
Measured
Best county pages to open first
Maricopa County
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.
Pima County
Demand cohort local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 6.8% 4.0+
Pima County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 6.8% 4.0+ with a local housing base of 471,058 units and a modeled planning range of $925-$1643.
Pinal County
Demand cohort local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 8.9% 4.0+
Pinal County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 8.9% 4.0+ with a local housing base of 175,474 units and a modeled planning range of $925-$1643.
Yavapai County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 16.2% 4.0+
Yavapai County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 16.2% 4.0+ with a local housing base of 121,829 units and a modeled planning range of $925-$1643.
Coconino County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 30% 4.0+
Coconino County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 30% 4.0+ with a local housing base of 69,233 units and a modeled planning range of $925-$1643.
Cochise County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 26.9% 4.0+
Cochise County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 26.9% 4.0+ with a local housing base of 59,056 units and a modeled planning range of $925-$1643.
Gila County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 64.7% 4.0+
Gila County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 64.7% 4.0+ with a local housing base of 32,519 units and a modeled planning range of $925-$1643.
Mohave County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 4.1% 4.0+
Mohave County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 4.1% 4.0+ with a local housing base of 118,073 units and a modeled planning range of $925-$1643.
Graham County
Cost eligible local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 36.4% 4.0+
Graham County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs: 36.4% 4.0+ with a local housing base of 13,755 units and a modeled planning range of $925-$1643.
Yuma County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 0% 4.0+
Yuma 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 92,808 units and a modeled planning range of $925-$1643.
Navajo County
Evidence-backed local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 0% 4.0+
Navajo 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 56,556 units and a modeled planning range of $925-$1643.
Apache County
Cost eligible local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 0% 4.0+
Apache 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 29,032 units and a modeled planning range of $925-$1643.
Santa Cruz County
Cost eligible local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs: 0% 4.0+
Santa Cruz 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 18,811 units and a modeled planning range of $925-$1643.
La Paz County
Cost eligible local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs
La Paz County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs with a local housing base of 13,692 units and a modeled planning range of $925-$1643.
Greenlee County
Cost eligible local evidence
$925-$1643
CDC EPHT Network Radon Tests from Labs
Greenlee County is a strong cost page because it pairs CDC EPHT Network Radon Tests from Labs with a local housing base of 4,409 units and a modeled planning range of $925-$1643.
County estimates
Open a Arizona 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 Arizona?
Price ranges across Arizona 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.