Radon Mitigation in Kingston, NH

Kingston is one of the more suburban towns we serve, mostly single-family, mostly owner-occupied, and radon tends to catch people here off guard for exactly that reason: a well-kept, newer house does not look like the kind of place that would have an invisible gas problem. Radon does not check the age of the foundation before it comes up through it.

What it costs

Expect somewhere between $1,950 and $2,250 for most single-family jobs, with the full possible range running $900 up to $6,000 for a more involved layout. Installing this kind of system legally requires certification in New Hampshire, ours is RMS-113966, backed by insurance. That $50 you pay for the test is not a separate cost if you proceed, it comes off the mitigation invoice.

What the numbers mean

The EPA’s action level is 4.0 pCi/L, with 2.0 pCi/L as the level it recommends aiming for where practical. The national indoor average sits around 1.3 pCi/L. A result above that average is worth a second look even below the official action level.

The install itself

One hole cored through the concrete floor, opening into a pocket dug in the stone below. A PVC pipe glued into that hole runs up through the house and out above the roofline, with a fan pulling soil gas out from under the slab continuously. Most installs take a single day.

Why a “clean” inspection report did not catch this

A standard home inspection does not typically include a radon test unless it is specifically requested, and Kingston’s newer, well-maintained housing stock means buyers sometimes skip it, assuming a newer house is a safer house on every front. Radon is the one category where that assumption does not hold. If your inspection did not include a radon test, that is not a red flag about the house, it just means the question has not been answered yet.

A smaller town does not mean a longer wait

We hear a version of this question often from smaller NH towns: does being a small town mean getting pushed to the back of the schedule behind bigger jobs elsewhere? No. Radon jobs are quick, usually a single day on site, and we schedule Kingston the same way we schedule anywhere else in our service area, on the order calls come in, not on the size of the town.

Short-term test or long-term test

A short-term radon test runs 2 to 7 days with the house closed up and gives a fast screening number. A long-term test runs 90 days or more and gives a more accurate annual average, since radon levels shift with the season and with how sealed a house gets for heat. Most homeowners start with the short-term version because it is faster and cheaper. If that number lands close to the EPA’s 4.0 pCi/L action level rather than clearly above or below it, the long-term test earns its extra time before you commit to a system. A number well above 4.0 generally does not need a second test before mitigating.

Frequently asked questions

What a recent customer said

603 team did a great job on our radon mitigation system. From quoting to install it was quick and easy! The install team did great work and the system has worked as promised.

Adam Baldauf, 5 stars, Google review

Housing age: Census ACS 2023 5-yr (B25035). EPA radon action level. Review quoted verbatim, public Google review.