Off-grid site report
Harnett County, NC
35.5078, -78.7392 · 289 ft elevationRead this before you act on anything below. This is my researched starting point for Harnett County, NC, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
The local rulesHarnett County, NC
Zoning & raw-land occupancy
RestrictedHarnett County has adopted a countywide Unified Development Ordinance (UDO) administered by county Planning Services, built on state Chapter 160D authority; no land or structure may be developed without complying with it. A bona fide farm exemption exists within the UDO. source
Dwellings, tiny homes & RVs
Varies locallyManufactured homes are a distinct permitted category needing a zoning compliance inspection before occupancy; RVs as permanent dwellings are only clearly addressed for religious workers' quarters. Specific tiny-home or standalone RV rules are not confirmed, so check with Planning Services.
Building permits & codes
Generally allowedCentral Permitting processes building permits and routes them to Environmental Health, Inspections, Planning, the Fire Marshal, and Harnett Regional Water; the UDO requires Building Inspector approval before occupancy or use change.
Septic & composting toilets
Generally allowedSeptic permitting runs through Harnett County's Environmental Health On-Site Wastewater Section coordinated with Central Permitting; composting toilets specifically are not addressed in county materials reviewed.
Greywater reuse
RestrictedNo separate county greywater ordinance was found; wastewater intake forms suggest greywater/drain systems are folded into standard Environmental Health wastewater review rather than exempted.
Rainwater harvesting
Generally allowedNo Harnett-specific restriction on rainwater harvesting or cisterns was found; this appears to default to the state building code baseline.
Private wells & water rights
Generally allowedWell construction and abandonment permits are processed through Harnett County Central Permitting and Environmental Health, with a published Well Construction Permit Application.
Living disconnected from utilities
Unclear - verifyThere is no standalone off-grid ordinance, but a Certificate of Occupancy requires an approved sewage disposal method and, where present, a permitted well, so full utility disconnection for a legally occupied home is not clearly achievable; confirm with Central Permitting.
Sun30-year normals
- Peak-sun hours, annual average
- 5.2 hrs/day
- Worst month (sizes an off-grid array)
- 3.8 hrs/day
- Yearly output per 1 kW of panels
- 1,474 kWh
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Weather1991-2020
- Precipitation
- 48 in/yr
- Snowfall
- 2 in/yr
- Heating degree days
- 3,304 (moderate)
- Frost-free season
- Mar 31 to Nov 4
How far help isstraight-line
- Hospital
- none within range
- Fire station
West Johnston Fire Department - 7.6 mi
- Hardware store
Ace Hardware - 0.1 mi
- Grocery
Food Lion - 6.1 mi
From OpenStreetMap. Road miles will be longer, often much longer in hill country.
Plan this spot
These open with this location's real numbers already filled in (ZIP 27501).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Harnett County, NC?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →Share or save this report:New report
Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 21, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.
New here, or not sure where this fits? Start here walks through the whole thing in order.