Carroll County, NH zoning map, flood zone and property lines by address
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Towns in Carroll County: Moultonborough, Wakefield, Ossipee.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Carroll County has 154 FIRM panels, the newest effective March 2013; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Carroll house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the NH GRANIT parcel mosaic, from town parcel maps, so a Carroll lot shows the same lines the town assessor draws. Carroll County covers about 596,401 acres of land and 39,435 acres of water.
Mapped lines are approximate. The town assessors in Carroll County keep the parcel record (Carroll County website); a licensed surveyor sets the true corners.
Zoning
In New Hampshire zoning is set by each town and city, not by the county. ParcelSheet shows the use code on the lot's parcel record and the municipality it sits in; the town planning and zoning office has the district, the uses it allows and the lot size it needs. The Carroll County website lists the county's municipalities.
ADU and guest houses
Under New Hampshire's municipal zoning law (RSA Chapter 674, starting at 674:16), each town and city can allow an accessory dwelling unit on a lot with a house. Whether a Carroll lot can add one depends on its district; the town planning and zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Carroll County is soil survey area NH603, Carroll County Area, New Hampshire, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Carroll County needs a state construction approval from the New Hampshire Department of Environmental Services Subsurface Systems Bureau.
Setbacks
Setbacks in Carroll County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the town planning and zoning office gives them for the lot's district.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Carroll lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Carroll County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Carroll County has 154 panels, the newest effective March 2013. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Carroll County?
Open the New Hampshire map, type the address, and the parcel outline from the town assessors in Carroll County shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Carroll County?
Zoning in Carroll County is set by each town and city, not by the county. ParcelSheet shows the use code on the parcel record and names the municipality; the town planning and zoning office has the final word.
Can I build an ADU in Carroll County?
Under New Hampshire's municipal zoning law (RSA Chapter 674, starting at 674:16), each town and city can allow an accessory dwelling unit, and each sets its own rules. In Carroll County ask the town planning and zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Carroll County?
Yes. A new or changed septic system in Carroll County needs a state construction approval from the New Hampshire Department of Environmental Services Subsurface Systems Bureau. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area NH603 (Carroll County Area, New Hampshire).
What can I build on 5 acres in Carroll County?
Zoning in Carroll County is set by each town and city, not the county. The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the town planning and zoning office has the district and its rules. See the Carroll County website.
What are the residential setbacks in Carroll County (2026)?
Setbacks in Carroll County come from the zoning code of the municipality the lot sits in: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the town planning and zoning office gives them for the district. See the Carroll County website.
Next to Carroll County: Belknap County, Coos County, Grafton County, Strafford County.
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