Can you live off-grid in Grafton County, New Hampshire?
87
of 100
Good with caveats
Yes, with two things to plan around. Water is easy here, with about 45 inches of rain a year and wells near 160 feet. The growing season is about 146 frost-free days and winter sun is weak, so plan on a greenhouse and a bigger battery bank or a generator. Septic will likely cost more, because rock or a hard layer sits about 33 inches down.
What the land says
Rain
Rain can supply much of a household's water with a large tank. A garden mostly waters itself in normal years.
About 45 inches a year (PRISM, 1991 to 2020 average)
Wells
Typical well depth. Budget for a mid-range well.
The typical well here is about 160 feet deep; a well typically runs $8,000 to $18,000
Growing season
Short. Start seeds indoors and favor cold-hardy crops.
About 146 frost-free days, USDA zone 5a; last frost about May 11, first about October 5
Sun
Fair sun. Plan a larger array or a generator for winter.
About 4.4 hours of full sun a day, averaged over the year
Flood
Flood zones run along creeks and rivers here. Look up the parcel on FEMA's flood map.
FEMA maps flood zones in places
Wildfire
Low wildfire risk.
U.S. Forest Service wildfire hazard map: Very Low to Low here
Storms
Hurricanes and strong tornadoes are rare here.
NOAA: no hurricane-strength storm within 50 miles since 1975; no strong (EF2 or stronger) tornado within 25 miles since 1990
Terrain
Rolling ground. Look for a flat house site.
Slopes average about 13%, about 1,060 feet above sea level
Soil
Expect a costlier septic system, because rock or a hard layer sits about 33 inches down. The county's soil test decides.
Loam, well drained (USDA soil survey). A mound, sand filter, or treatment unit typically runs $10,000 to $20,000
Road
Paved roads are close by.
Nearest paved road usually within about 0.5 miles (OpenStreetMap)
Check a New Hampshire parcel, or plan the one you own
Get a free 0-100 off-grid score.
A step-by-step build plan, sizing your solar, water, garden, septic, heat, and buildings.
Is it legal here?
Zoning
Set by the town, not the county. The rules depend on which town the parcel is in.
Building code
The New Hampshire State Building Code, which uses the 2024 International Residential Code for homes since July 2026, applies in every town. Towns that choose to enforce it issue permits and inspect; elsewhere the state fire marshal may enforce it at the town's request.
Rainwater
Collecting it is allowed.
Composting toilets
Allowed.
Water rights
Owners of land along a creek or lake can make reasonable use of its water.
Drilled to about 160 feet, with pump and pressure tank
Septic
$10,000 to $20,000
Mound, sand filter, or treatment unit
Solar and batteries
$21,000 to $33,000
Sized for a modest household
Road or driveway
$3,000 to $9,000
From the nearest road to a house site
Clearing
$1,000 to $4,000
A house site, solar, and garden
Total
$44,000 to $85,000
Before the house
Before you make an offer on land here
Soil test
Get a soil test before you count on septic.
Rock or a hard layer sits about 33 inches down, which can rule out a standard system.
Flood map
Look up the parcel on FEMA's flood map.
Flood zones run along creeks and rivers here. Building in one means flood insurance and extra permits.
Zoning
Call the town office with the parcel's address.
Zoning here is set by the town, not the county.
Nearby counties
93,146 people live in Grafton County, about 54.5 per square mile. It ranks 9th of the 10 New Hampshire counties we scored, and New Hampshire ranks 23rd of 50 states.