Fairfax city, VA Shrink-Swell Risk

Shrink-swell potential in Fairfax city, VA

Low

Soil across 78.9% of Fairfax city, VA comes back "Low" in USDA's shrink-swell data, averaging 2.29% 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 Fairfax city, VA - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Fairfax city will actually do.

Fairfax city: the real numbers

Fairfax city'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.

Fairfax city's rank among Virginia counties

Among the 3,085 rated counties on this site, Fairfax city, VA ranks 1,731 most-constrained nationally, and 55 of 114 within Virginia. Fairfax city covers 6 square miles and counts 26,340 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Roberts County, TX and Trimble County, KY 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 Pittsylvania County, VA and Arlington County, VA. The full underlying dataset is downloadable directly, one row per county.