Belknap County, NH Shrink-Swell Risk

Belknap County's SSURGO shrink-swell reading

Low

In Belknap County, NH, 97.4% of the surveyed soil carries a "Low" shrink-swell rating, 1.02% linear extensibility on average. 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.

Before you rely on this for one address

Belknap County's reading is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Budgeting for Belknap County, NH

Belknap 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 Belknap County, NH compares

Among the 3,085 rated counties on this site, Belknap County, NH ranks 2,887 most-constrained nationally, and 5 of 10 within New Hampshire. The county spans 402 square miles, home to 65,257 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Fond du Lac County, WI and Sierra County, CA 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 New Hampshire

Every county in New Hampshire is on this site, including Hillsborough County, NH and Carroll County, NH. The full underlying dataset is downloadable directly, one row per county.