Rockland County, NY Shrink-Swell Risk

Shrink-swell potential in Rockland County, NY

Low

Soil across 99.5% of Rockland County, NY comes back "Low" in USDA's shrink-swell data, averaging 1.39% 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 Rockland County, NY - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Rockland County: the real numbers

Rockland 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, Rockland County, NY ranks 2,621 most-constrained nationally, and 31 of 62 within New York. Rockland County, NY is 174 square miles with a population of 348,144.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Goodhue County, MN and Musselshell County, MT 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 New York

Every county in New York is on this site, including Monroe County, NY and Albany County, NY. The full underlying dataset is downloadable directly, one row per county.