Short-term radon test
A 48-hour closed-house test at the lowest lived-in level, placed and read by a New Jersey certified measurement business. The number everything else follows from.
$150 – $325
typical range, not a quote
Every figure below is a typical range for this area, gathered from what local work generally runs. None of it is a quote. Two houses on the same road can need very different systems, and the number of suction points a floor actually needs is settled by measurement rather than by square footage.
What decides where in a range you land is usually one of four things: how many suction points the slab needs, whether there is a slab at all, where the pipe can physically run, and whether the water is part of the problem as well as the soil.
Testing and diagnostics
Long-term and follow-up radon testing
A 90-day-to-a-year detector that returns an annual average instead of a weather-dependent snapshot. What a borderline short-term result deserves.
$175 – $400
typical range, not a quote
Post-mitigation clearance testing
The re-test after a system goes in. Without it nobody knows whether the fan on the side of the house is doing anything at all.
$150 – $350
typical range, not a quote
Mitigation systems
Active sub-slab depressurization
One or more suction points through the slab, sealed pipe to above the roofline, and a fan outside the living space. The system most Hunterdon houses get.
$1,200 – $2,600
typical range, not a quote
Crawl space sub-membrane depressurization
Sealed membrane over an open crawl-space floor with suction drawn beneath it. The right system when there is no slab to cut through.
$2,000 – $3,800
typical range, not a quote
Drain tile and sump-based depressurization
Sealing the sump and drawing suction through an existing perimeter drain loop. Efficient where the drainage is already there.
$1,400 – $2,800
typical range, not a quote
Block-wall depressurization
Suction drawn from inside a hollow block wall, with the top course sealed. The piece a slab-only system misses on block foundations.
$1,800 – $3,200
typical range, not a quote
Multi-point suction for large and additioned homes
Separate suction points for slabs that don't talk to each other, tied into one riser. What a rambling house or a stubborn reading usually needs.
$2,600 – $6,000
typical range, not a quote
Sealing, sump covers and slab-crack closure
Gasketed sump lids, sealed floor-wall joints, and closed slab penetrations. Rarely enough alone — but it makes the system that follows work properly.
$400 – $1,300
typical range, not a quote
Radon fan replacement and system service
Swapping a worn or failed fan for one matched to the pressure the system runs at, and confirming the house came back down afterwards.
$300 – $750
typical range, not a quote
Failed and non-compliant system repair
Diagnosing why an existing system didn't get the number down, and fixing the actual cause rather than adding a bigger fan.
$500 – $1,800
typical range, not a quote
Water and buildings
Radon-in-water aeration system
Point-of-entry aeration for private wells carrying radon into the house through the plumbing. The half of the problem an air system can't reach.
$3,800 – $6,500
typical range, not a quote
Granular activated carbon water treatment
A carbon bed that adsorbs radon out of well water. Cheaper than aeration, less effective at high concentrations, and it needs siting with care.
$1,200 – $2,200
typical range, not a quote
Radon-resistant new construction and passive stack activation
The rough-in the Radon Hazard Subcode requires on new builds in Tier 1 towns, and switching an already-installed passive stack over to an active one.
$500 – $2,500
typical range, not a quote
Commercial, school and multi-family mitigation
Room-by-room measurement and phased design for schools, child-care, multi-family and commercial slabs, usually starting at the HVAC rather than the floor.
$6,000 – $45,000
typical range, not a quote
Soil vapour intrusion mitigation
Sub-slab systems for chlorinated solvent and petroleum vapours. Same hardware as radon, an entirely different regulatory route.
$5,000 – $30,000
typical range, not a quote
What a good quote contains
The number of suction points and the reason for that number. What sealing is included. Where the discharge terminates. Which fan, and why. Whether a post-mitigation clearance test is in the price or billed separately. And the business's NJDEP radon certification number, which you can check for yourself.
We are a referral service, not a radon contractor. We do not set prices, perform work, or take any part of what you pay a certified business.