Glen Rock sits in the South Branch Codorus Creek valley on the Heritage Rail Trail, and it shares the fractured Wissahickon schist bedrock that makes southern York County one of the highest-radon regions in Pennsylvania. DEP data for the 17327 ZIP code shows a majority of tested homes above the 4.0 pCi/L action level, and the ridges toward Seven Valleys, Loganville and Shrewsbury regularly produce readings in the 15–40 pCi/L range. If you have never tested a Glen Rock home, assume it is high until proven otherwise.
The borough is mostly 1800s mill-town homes — the Glen Rock Carolers' town — on stone and rubble foundations built into the hillside, which means partial basements, walk-outs and crawl spaces that need careful sealing and often a membrane system. Springfield and Shrewsbury Township developments off Route 216 and Church Street are 1980s–2010s homes on poured foundations that take a standard sub-slab system, though the tight soils usually call for a high-static fan. Every install gets a post-mitigation test and a written result. Homes on wells should also test their water.
Around Glen Rock
We regularly work near:
- 📍Heritage Rail Trail
- 📍Glen Rock Mill Inn
- 📍Susquehannock High School
- 📍Route 216 (Main Street)
- 📍South Branch Codorus Creek
Radon Mitigation in Glen Rock — Local Notes
- •Hillside stone-foundation homes usually need a combined sub-slab and crawl space design.
- •High-static fans are standard here because of tight schist soils.