Chester County, PA Shrink-Swell Risk

Chester County's SSURGO shrink-swell reading

Low

In Chester County, PA, 87.2% of the surveyed soil carries a "Low" shrink-swell rating, 1.72% linear extensibility on average. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

Before you rely on this for one address

Chester County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Chester County.

Budgeting for Chester County, PA

Chester 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Chester County, PA ranks 2,252 most-constrained nationally, and 21 of 67 within Pennsylvania. The county spans 751 square miles, home to 560,745 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Clarion County, PA and Bee County, TX 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 Venango County, PA and Mifflin County, PA. The full underlying dataset is downloadable directly, one row per county.