Hampshire County, MA zoning map, flood zone and property lines by address
Free, no account. Or open the Massachusetts map and tap a lot.
Towns in Hampshire County: Northampton, Amherst Center, South Hadley.
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 has 70 FIRM panels covering Hampshire County, the newest effective February 2023; 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 Hampshire 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 MassGIS, Property Tax Parcels from city and town assessors, so a Hampshire lot shows the same lines the town assessor draws. Hampshire County covers about 337,431 acres of land and 11,522 acres of water.
Mapped lines are approximate. The town assessors in Hampshire County keep the parcel record (Hampshire County website); a licensed surveyor sets the true corners.
Zoning
In Massachusetts zoning is set by each city and town, not by the county: in Hampshire County, Northampton zones the land inside its limits. ParcelSheet shows the use code on the lot's parcel record and the municipality it sits in; the town building or zoning office has the district, the uses it allows and the lot size it needs. The Hampshire County website lists the county's municipalities.
ADU and guest houses
Under Massachusetts's Zoning Act (General Laws Chapter 40A), each city and town can allow an accessory dwelling unit on a lot with a house. Whether a Hampshire lot can add one depends on its district; the town building or 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. Hampshire County is soil survey area MA609, Hampshire County, Massachusetts, Central Part, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Hampshire County needs a permit from the town or city board of health (under MassDEP Title 5 rules).
Setbacks
Setbacks in Hampshire County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the town building or zoning office gives them for the lot's district, and Northampton for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Hampshire lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Hampshire County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA has 70 flood map panels covering Hampshire County, the newest effective February 2023. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Hampshire County?
Open the Massachusetts map, type the address, and the parcel outline from the town assessors in Hampshire 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 Hampshire County?
Zoning in Hampshire County is set by each city and town (such as Northampton), not by the county. ParcelSheet shows the use code on the parcel record and names the municipality; the town building or zoning office has the final word.
Can I build an ADU in Hampshire County?
Under Massachusetts's Zoning Act (General Laws Chapter 40A), each city and town can allow an accessory dwelling unit, and each sets its own rules. In Hampshire County ask the town building or 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 Hampshire County?
Yes. A new or changed septic system in Hampshire County needs a permit from the town or city board of health (under MassDEP Title 5 rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area MA609 (Hampshire County, Massachusetts, Central Part).
What can I build on 5 acres in Hampshire County?
Zoning in Hampshire County is set by each city and town, not the county (such as Northampton). 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 building or zoning office has the district and its rules. See the Hampshire County website.
What are the residential setbacks in Hampshire County (2026)?
Setbacks in Hampshire 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 building or zoning office gives them for the district. See the Hampshire County website.
Next to Hampshire County: Berkshire County, Franklin County, Hampden County, Worcester County.
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