Kitsap County, WA Shrink-Swell Risk

What Kitsap County, WA's soil means for a foundation

Low

USDA's SSURGO data puts Kitsap County, WA's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.19% across 94.5% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

This is a county figure, not a lot figure

USDA's survey covers the whole of Kitsap County, WA at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Kitsap County will actually do.

Report cost vs. repair cost

With Kitsap County, WA rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. 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.

Kitsap County's rank among Washington counties

Nationally, Kitsap County, WA is the 2,773-most-constrained of 3,085 rated counties for shrink-swell soil. Within Washington alone it ranks 39 of 39. The county spans 395 square miles, home to 281,420 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Ramsey County, MN and Winnebago 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

More of Washington

Every county in Washington is on this site, including Skagit County, WA and Stevens County, WA. The full underlying dataset is downloadable directly, one row per county.