Middlesex County, NJ Shrink-Swell Risk

Shrink-swell potential in Middlesex County, NJ

Low

Soil across 83.2% of Middlesex County, NJ comes back "Low" in USDA's shrink-swell data, averaging 1.66% linear extensibility. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Middlesex County, NJ - 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).

Middlesex County: the real numbers

Middlesex 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, Middlesex County, NJ ranks 2,318 most-constrained nationally, and 4 of 21 within New Jersey. Middlesex County covers 309 square miles and counts 890,119 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Ouray County, CO and West Baton Rouge Parish, LA 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 Jersey

Every county in New Jersey is on this site, including Camden County, NJ and Passaic County, NJ. The full underlying dataset is downloadable directly, one row per county.