Socorro County, NM zoning map, flood zone and property lines by address
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Towns in Socorro County: Socorro, Alamo.
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 Socorro County has 141 FIRM panels, the newest effective May 2016; 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 Socorro 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 New Mexico county parcel layers (each county publishes its own), so a Socorro lot shows the same lines the county assessor draws. Socorro County covers about 4,253,687 acres of land and 1,197 acres of water.
Mapped lines are approximate. The Socorro County assessor keeps the parcel record (Socorro County website); a licensed surveyor sets the true corners.
Zoning
Socorro County zones its unincorporated land, and Socorro zones the land inside its limits. ParcelSheet shows the use the county assessor lists for the lot and links the county planning and zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under New Mexico's zoning law for counties and municipalities (NMSA 1978, Chapter 3, Article 21, starting at 3-21-1), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Socorro lot can add one depends on its district; the county 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. Socorro County is soil survey area NM664, Socorro County Area, New Mexico, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Socorro County needs a permit from the New Mexico Environment Department Onsite Wastewater Bureau, through its field office for Socorro County.
Setbacks
Setbacks in Socorro County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county zoning office gives them for the lot's district, and Socorro for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Socorro lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Socorro 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 Socorro County has 141 panels, the newest effective May 2016. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Socorro County?
Open the New Mexico map, type the address, and the parcel outline from the Socorro County assessor 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 Socorro County?
Zoning in Socorro County is set by the county for unincorporated land and by each city (such as Socorro) inside its own limits. ParcelSheet shows the use code the county assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Socorro County?
Under New Mexico's zoning law for counties and municipalities (NMSA 1978, Chapter 3, Article 21, starting at 3-21-1), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Socorro County ask the 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 Socorro County?
Yes. A new or changed septic system in Socorro County needs a permit from the New Mexico Environment Department Onsite Wastewater Bureau, through its field office for Socorro County. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area NM664 (Socorro County Area, New Mexico).
What can I build on 5 acres in Socorro County?
Zoning in Socorro County is set by the county for unincorporated land and each city inside its own limits (such as Socorro). 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 planning office has the district and its rules. See the Socorro County website.
What are the residential setbacks in Socorro County (2026)?
Setbacks in Socorro County come from the zoning code of the county, or of the city when the lot is inside city limits: 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 zoning office gives them for the district. See the Socorro County website.
Next to Socorro County: Catron County, Cibola County, Lincoln County, Sierra County, Torrance County, Valencia County.
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