Pinal County, AZ Shrink-Swell Risk

Pinal County's SSURGO shrink-swell reading

Low

In Pinal County, AZ, 70.6% of the surveyed soil carries a "Low" shrink-swell rating, 2.4% linear extensibility on average. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

Before you rely on this for one address

Pinal County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Pinal County.

Budgeting for Pinal County, AZ

Pinal 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, Pinal County, AZ ranks 1,644 most-constrained nationally, and 11 of 15 within Arizona. Pinal County, AZ is 5,367 square miles with a population of 513,862.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Pike County, IL and Lemhi County, ID 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 Gila County, AZ. The full underlying dataset is downloadable directly, one row per county.