Coconino County, AZ Shrink-Swell Risk

Shrink-swell potential in Coconino County, AZ

Low

Soil across 66.2% of Coconino County, AZ comes back "Low" in USDA's shrink-swell data, averaging 2.68% 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 Coconino County, AZ - 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 Coconino County.

Coconino County: the real numbers

Coconino 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, Coconino County, AZ ranks 1,427 most-constrained nationally, and 9 of 15 within Arizona. Coconino County, AZ is 18,616 square miles with a population of 145,161.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Cherry County, NE and Waukesha County, WI 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 Arizona

Every county in Arizona is on this site, including Apache County, AZ and Yavapai County, AZ. The full underlying dataset is downloadable directly, one row per county.