Hunterdon County · 25 of 26 towns NJDEP Tier 1 Action level 4.0 pCi/L Free for homeowners — paid by the crews
Hunterdon RadonTesting & mitigation

Branchburg, Branchburg Township, Somerset County

Active sub-slab depressurization in Branchburg

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.

Branchburg owners ask about active sub-slab depressurization more than you would think for a town this size.

The situations this follows from

  • A sale is under contract and the buyer's radon result triggered a repair request
  • Cracks and utility penetrations through a slab you can see daylight around
  • A test came back at or above 4.0 pCi/L on a basement or slab home

Why this comes up in Branchburg

It genuinely depends on the neighbourhood. Where a Branchburg address is on a well, it draws from the same Newark Basin shale that runs under Flemington. That is part of the context any crew working in Branchburg has to design around.

Branchburg Township, Somerset County — the state's own numbers

40% of the 4,997 test results NJDEP holds for Branchburg Township, Somerset County were at or above the 4.0 pCi/L action level — 2,005 of them. That puts it in Tier 1 — high potential.

Extensive late 20th century single-family development with full basements, alongside older farm properties and village pockets.

Practicalities in Branchburg

Suburban lots with good side access on most of the newer housing.

Any permit for this runs through Branchburg Township, Somerset County. NJDEP radon certification has to be current before a business receives anything from us.

How it's normally done

The standard fix. A suction point is cut through the slab, pipe is run up through the house or along an exterior wall, and an in-line fan mounted outside conditioned space pulls soil gas from under the floor and discharges it above the roofline. Sizing follows a diagnostic reading of how permeable the fill under the slab actually is, not the square footage of the house.

Typical cost in Hunterdon County, NJ

$1,200 – $2,600 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.

Nobody can tell you what yours needs from a description alone, including us.

What we confirm before anyone calls you

This is certified work in New Jersey, not general home improvement. We look up the business on the NJDEP radon register, confirm the mitigation certification is active, and record the date. Insurance is not part of that check, and nothing here should be read as confirming that any business carries liability cover. None of that is an endorsement of their workmanship — get more than one quote.

Never tested, and wondering whether to?

Write down what the system is doing and what the re-test said. We'll get it to crews who diagnose rather than guess.

Get quotes in Branchburg →

Related

Also common in Branchburg

Other work in Branchburg

Same ground, different question.

Active sub-slab depressurization nearby

Neighbouring towns on the same ground.