Loudoun County, VA Shrink-Swell Risk

Shrink-swell potential in Loudoun County, VA

Low

Soil across 74% of Loudoun County, VA comes back "Low" in USDA's shrink-swell data, averaging 2.41% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Loudoun County, VA - 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 Loudoun County.

Loudoun County: the real numbers

Loudoun 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.

How Loudoun County, VA compares

Among the 3,085 rated counties on this site, Loudoun County, VA ranks 1,627 most-constrained nationally, and 44 of 114 within Virginia. The county spans 516 square miles, home to 443,380 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Lancaster County, VA and Henderson County, IL 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 Virginia

Every county in Virginia is on this site, including Buchanan County, VA and Smyth County, VA. The full underlying dataset is downloadable directly, one row per county.