Orange County, NC: flood zone, zoning and property lines by address
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Towns in Orange County: Chapel Hill, Carrboro, Hillsborough.
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 Orange County has 118 FIRM panels, the newest effective June 2026; 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 an Orange 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 NC OneMap statewide parcel layer (each county tax office's parcels, published by the NC Center for Geographic Information and Analysis), so an Orange lot shows the same lines the tax office draws. Orange County covers about 254,459 acres of land and 2,160 acres of water.
Mapped lines are approximate. The Orange County tax office keeps the parcel record (Orange County website); every county's office is on the state's county assessors list; a licensed surveyor sets the true corners.
Zoning
Orange County zones its unincorporated land, and Chapel Hill, Carrboro, Hillsborough each zone the land inside their limits. ParcelSheet shows the use the tax office lists for the lot and links the county planning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Chapter 160D of the North Carolina General Statutes lets local governments allow an accessory dwelling unit on a lot with a house. Whether an Orange lot can add one depends on its district; the county planning 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. Orange County is soil survey area NC135, Orange County, North Carolina, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Orange County needs a permit from the Orange County health department, under the NC DHHS On-Site Water Protection Branch, which tests the soil on the lot itself.
Setbacks
Setbacks in Orange 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 Chapel Hill, Carrboro, Hillsborough for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Orange lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Orange 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 Orange County has 118 panels, the newest effective June 2026. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Orange County?
Open the North Carolina map, type the address, and the parcel outline from the county tax office 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 Orange County?
Zoning in Orange County is set by the county for unincorporated land and by each city (such as Chapel Hill, Carrboro) inside its own limits. ParcelSheet shows the use code the tax office lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Orange County?
Chapter 160D of the North Carolina General Statutes lets counties and cities allow an accessory dwelling unit, and each sets its own rules. In Orange 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 Orange County?
Yes. A new or changed septic system in Orange County needs a permit from the Orange County health department, under the NC DHHS On-Site Water Protection Branch. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area NC135 (Orange County, North Carolina).
Next to Orange County: Alamance County, Caswell County, Chatham County, Durham County, Person County.
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