Washington County, PA Shrink-Swell Risk

Shrink-swell potential in Washington County, PA

Low

Soil across 73.1% of Washington County, PA comes back "Low" in USDA's shrink-swell data, averaging 2.59% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Washington County, PA - never a reading for one specific parcel. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Washington County.

Washington County: the real numbers

Washington County's soil reading points toward standard foundation practice as the likely outcome, not the exception. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.

Washington County's rank among Pennsylvania counties

Among the 3,085 rated counties on this site, Washington County, PA ranks 1,482 most-constrained nationally, and 1 of 67 within Pennsylvania. The county spans 857 square miles, home to 210,434 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Kent County, MD and Kiowa County, CO are worth a look for comparison.

How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil

Elsewhere in Pennsylvania

Every county in Pennsylvania is on this site, including Bradford County, PA and Butler County, PA. The full underlying dataset is downloadable directly, one row per county.