Basement Waterproofing Contractors in Mercer County, NJ
Mercer County is split by the boundary between two of New Jersey's physiographic provinces. The state geological survey traces the Fall Line from Carteret through Princeton Junction to Trenton, with Piedmont rock to the north and west and Coastal Plain sediment to the south and east.
Two kinds of ground in one county
A Mercer County basement north of that line, in Hopewell or Pennington, sits on Triassic and Jurassic sedimentary rock. One in Hamilton or East Windsor sits in the Coastal Plain's unconsolidated deposits. Trenton straddles the edge.
That difference shapes the estimate: digging and drainage on rock behave differently from work in sand and clay, so ask the contractor about recent jobs on your side of the Fall Line.
Princeton's radon numbers
In NJDEP's 2015 report, Princeton had 4,261 of 12,615 tested homes at or above 4 pCi/L, about 34%. Ewing had about 29% of 5,120 and Lawrence about 26% of 7,470, all Tier 1. Hamilton Township, with 10,560 tests, was about 7%, and Trenton about 11%, both Tier 2.
Princeton, Ewing and Lawrence all landed in Tier 1, so in those Mercer County towns treat a radon test as part of any basement project.
Houses from the 1960s and 1970s
DVRPC's Mercer County housing profile, based on 2022 American Community Survey estimates, says nearly one-quarter of the county's homes were built between 1960 and 1979. Foundations of that age are now roughly 45 to 65 years old, which is when original coatings and drain tile deserve a close look.
After Ida
In the weeks after the September 2021 storm, FEMA ran a disaster recovery center at the Mercer County Library in Ewing to help residents apply for assistance. If your Mercer County basement took water then, keep those records; New Jersey's seller disclosure now asks about past flooding.
Mercer County basement questions
Who will contact me about my Mercer County request?
The participating contractor for your Mercer County ZIP code, generally within one business day. No one else gets the request.
What if no contractor covers my Mercer County ZIP code?
We email you, keep the request private, and follow up if a participating contractor begins serving that part of Mercer County.
Is radon higher in Princeton than in Hamilton?
Much higher in NJDEP's 2015 data: about 34% of tested Princeton homes reached 4 pCi/L, compared with about 7% in Hamilton Township.
Where is the Fall Line in Mercer County?
The New Jersey Geological Survey traces it through Princeton Junction to Trenton, separating Piedmont rock from Coastal Plain sediment.
Waterproofing work in Mercer County
Neighboring counties
Planning a waterproofing job in Mercer County?
Your Mercer County ZIP code decides which single participating contractor receives the request. Their estimate is yours to accept or decline.
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