2026-02-25 · 4 min read
Radon Mitigation Cost in Rhode Island (2026)
Rhode Island is predominantly EPA Zone 1 — the same New England granite geology that makes NH, VT, and CT high-risk. Mitigation costs $1,100–$2,500 for most homes.
Radon in Rhode Island
Rhode Island is small but radon-significant. The state sits on a continuation of the New England granite-gneiss basement that drives high radon across Connecticut, New Hampshire, and Vermont. Providence County, Kent County, and most of interior Rhode Island are EPA Zone 1.
Newport County and the coastal Washington County communities run Zone 2. No Rhode Island community should be considered low-risk without testing.
Cost by Foundation Type
Finished Basement: $1,100–$2,400
Rhode Island's dense older housing stock — Colonials, Capes, and split-levels from the 1940s–1980s — almost universally has basements.
- Unfinished basement: $1,100–$1,600
- Finished basement: $1,500–$2,400
Crawl Space: $2,500–$5,000
Found in older coastal homes and some Providence triple-deckers with partial crawl spaces under additions.
Slab-on-Grade: $1,000–$1,900
Less common in Rhode Island's older housing stock, but found in some post-1990 construction.
Rhode Island-Specific Factors
Dense housing: Providence, Pawtucket, and the older mill cities have very dense older housing. Triple-deckers and multifamily homes may require building-wide assessment — radon affects all units differently depending on floor level.
New England labor costs: Rhode Island contractors charge at New England rates — expect 15–20% above national averages.
Well water: Rhode Island has areas with private wells, particularly in the western and southern parts of the state. Granite bedrock + well water = ask about water radon testing.
Rhode Island Resources
- RI Dept of Health: health.ri.gov (search "radon")
- Verify NRPP: radonproficiency.org
- Verify NRSB: nrsb.org
Frequently Asked Questions
Is radon a problem in Rhode Island?
Yes. Rhode Island is largely EPA Zone 1, driven by the same granite and gneiss bedrock underlying all of southern New England. Providence, Woonsocket, and most inland communities have elevated risk. The coastal communities are Zone 2.
How much does radon mitigation cost in Rhode Island?
Expect $1,100–$2,300 for basement homes — the predominant type in Rhode Island. Rhode Island shares a labor market with Connecticut and Massachusetts, keeping rates at New England levels.
Does Rhode Island require radon contractor licensing?
Rhode Island does not have a mandatory state radon contractor licensing program. Verify NRPP or NRSB certification.
Find a Certified Mitigator Near You
Every contractor on RadonBase is NRPP or NRSB certified — mitigators only, no testers.
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