Mold remediation in Carroll Valley

Carroll Valley has the newest housing on this list by a wide margin, with a median build year of 1993 and almost nothing predating 1940.

Reading the housing data

The Census reports 2.2 percent of housing built before 1940 and a 1993 median across 1,651 units. Fifty-one years separate that median from York Springs at the other end of this list, which is the widest age gap between any two municipalities here.

U.S. Census Bureau, American Community Survey 2024 5-year estimates (tables B25035, B25034, B25003), accessed via the Census Reporter API, retrieved 2026-09-15. 2020 Census figures as cited by each municipality’s Wikipedia article, retrieved 2026-09-15. Secondary source.

What building age does and does not tell you

Speaking generally rather than about any house here, the moisture questions that come up in late-century housing tend to be about ventilation and humidity control rather than about water arriving from outside. Whether that applies to a given property is a matter for measurement, not for its build year.

Local detail

Owner occupancy is 94.9 percent, the highest on this list, so nearly every decision here is made by a resident owner. A property that sits closed up for stretches runs without dehumidification during the most humid months.

Read next

The job most often needed here is attic mold removal, where the process, published costs and the questions worth asking are set out in full. For pricing, testing, insurance and whether you can do it yourself, see the questions homeowners actually ask.

Nearby: Biglerville, Arendtsville, Bendersville, York Springs · all service areas