THE DIRTBID REGIONAL MODEL · NEW HAMPSHIRE
Sitework in New Hampshire on the same Richmond Metro = 1.00 scale as the rest of DirtBid: 3 cost regions and 10 counties, each with a soil-risk rating from USDA and USGS data. Boston Metro (New Hampshire side) runs highest at 1.10×; Rest of New Hampshire lowest at 1.05×.
New Hampshire multipliers and county ratings are planning-level: built from federal price and soil data, and not yet checked against local bids or a local estimator.
Dominant ground: Tunbridge, Lyman, Becket
7 counties in this region. 5 of 7 rate high for shallow rock. 2 of 7 rate high for water table. Highest risk score: Belknap County (5 of 10).
Counties: Belknap County, Carroll County, Cheshire County, Coos County, Grafton County, Merrimack County, Sullivan County
Dominant ground: Hollis, Canton, Chatfield
2 counties in this region. 2 of 2 rate high for water table. 2 of 2 rate high for dewatering. Highest risk score: Rockingham County (5 of 10).
Counties: Rockingham County, Strafford County
Dominant ground: Canton, Monadnock, Marlow
1 county in this region. Highest risk score: Hillsborough County (5 of 10).
Counties: Hillsborough County
FAQ
From USDA soil survey data, the most common across the state: shallow rock (5 of 10 counties rate high), water table (4 of 10 counties rate high), dewatering (3 of 10 counties rate high). A parcel can differ from its county, so read the survey for your exact site.
From the Commerce Department's Regional Price Parities, on the same Richmond Metro = 1.00 scale as Virginia. Across 29 reviewed regions that method missed by about 0.03 on average. They have not been checked against executed bids in New Hampshire, so use them for planning, not a final bid.
They are screening ratings from federal soil and geology data, not a local estimator's review and not a geotechnical report. Tested against 511 reviewed counties, they land within one level most of the time, and exact matches are less common. Get borings before you price a real site.
Soil Report
A $350 DirtBid AI Soil Report reads the official USDA survey for your exact parcel, flags the hazards above, and prices the risk — before you buy land or sign a contract.