Milford owners ask about block-wall depressurization more than you would think for a town this size.
When this is the right question
- Radon entering high on the wall rather than at the floor
- An older block wall with an open top course
- A hollow concrete-block foundation wall
Why this comes up in Milford
Here is what makes Milford particular: the village has a borough supply, and the ground around it does not always. A well here draws from the basin-margin rock beneath Milford.
Milford Borough — the state's own numbers
42% of the 1,210 test results NJDEP holds for Milford Borough were at or above the 4.0 pCi/L action level — 505 of them. That puts it in Tier 1 — high potential.
A compact old mill village of 19th century houses on modest lots, with limited later building.
What access looks like here
Modest village lots with usable side access on many properties.
Milford Borough handles permitting for work at this address.
The usual approach
Hollow block walls are a network of interconnected voids running from the footing to the top course, and soil gas uses them as a chimney. Treating them means sealing the top course and drawing suction from inside the cavity, usually alongside a sub-slab system rather than instead of one.
Typical cost in Hunterdon County, NJ
$1,800 – $3,200 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.
The right answer depends on your specific building, which is why somebody has to measure it.
Who is allowed to do this in New Jersey
Under N.J.A.C. 7:28-27 this is not work a general contractor may take on. It requires a business certified by NJDEP for radon mitigation, with a certified mitigation specialist directing the work. We verify that on the state register, note the date, and route accordingly — but a verified certification is a fact, not a recommendation.
Not sure whether your number is a problem?
Give us the short version and the timeline. We'll put it in front of crews who can work to it, and tell you honestly if nobody can.
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Also common in Milford
Other work in Milford
Same ground, different question.
Block-wall depressurization nearby
Neighbouring towns on the same ground.