Situated among the rolling hills of Hillsborough County within New Hampshire's Monadnock region, Antrim features the granite bedrock and glacial soils characteristic of southern New Hampshire. The town's housing includes historic colonial homes and newer construction, many with full basements typical of New England architecture in zip codes 03040 and 03440. Since testing data is limited, residents should consider radon testing given the area's geological conditions that can contribute to elevated indoor radon levels.
Antrim, NH Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Antrim, NH Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Antrim Radon Facts
Key details about the radon risk profile for Antrim and the 03440 zip code area.
EPA Radon Zone
Zone 2 — Moderate Risk
County
Hillsborough County, NH
Zip Code
03440
Predicted Screening Level
2–4 pCi/L (Zone 2)
Antrim and the 03440 zip code are located in Hillsborough County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Antrim, NH
What EPA Radon Zone is Antrim in?
Antrim and the 03440 zip code are in Hillsborough County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Antrim?
Radon mitigation in Antrim typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Antrim?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
Most Active Radon Markets in New Hampshire
Cities with the most user-submitted radon test data in the state.
