Off-grid site report
Harrison County, TX
32.5137, -94.3175 · 367 ft elevationRead this before you act on anything below. This is my researched starting point for Harrison County, TX, 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 rulesHarrison County, TX
Zoning & raw-land occupancy
Unclear - verifyNo Harrison County zoning ordinance was found on the county's official site; Texas counties generally lack zoning power over unincorporated land. The City of Marshall's Planning and Zoning Commission handles plats within city limits and its one-mile extraterritorial jurisdiction, but that does not cover the broader unincorporated county.
Dwellings, tiny homes & RVs
Unclear - verifyNo Harrison County ordinance on minimum dwelling size, tiny homes, or RV occupancy was found. Texas has no statewide minimum house size and county authority here is narrow, but this is not confirmed as officially unregulated for Harrison County specifically.
Building permits & codes
Unclear - verifyHarrison County Environmental Health issues subdivision/septic permits, but I found no confirmation of whether the county has adopted a building code or requires general building permits for unincorporated-area construction. source
Septic & composting toilets
Generally allowedHarrison County Environmental Health (HCEH), based in Marshall, administers subdivision and septic (On-Site Sewage Facility) permitting under the statewide TCEQ framework that governs OSSFs in Texas. source
Greywater reuse
Unclear - verifyNo standalone Harrison County greywater ordinance was found; greywater likely falls under the general state OSSF/septic framework rather than a separate county program.
Rainwater harvesting
Generally allowedNo Harrison County restriction on rainwater harvesting was found; it inherits the state's generally supportive baseline promoted by the Texas Water Development Board, subject to standard plumbing cross-connection rules.
Private wells & water rights
Varies locallyWhether Harrison County lies within an active Groundwater Conservation District was not confirmed in this research; that status determines whether well permitting rules or the common-law rule of capture applies.
Living disconnected from utilities
Unclear - verifyNo Harrison County ordinance requiring connection to electric, water, or sewer utilities was found; any such rule would more likely come from a city like Marshall, and none was confirmed there either.
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
- 1,395 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 50 in/yr
- Snowfall
- 1 in/yr
- Heating degree days
- 2,402 (mild)
- Frost-free season
- Mar 11 to Nov 22
How far help isstraight-line
- Hospital
CHRISTUS Good Shepherd Medical Center - Marshall - 3.4 mi
- Fire station
Hallsville Volunteer Fire Department - Staion 1 - 15.0 mi
- Hardware store
Lowe's - 3.3 mi
- Grocery
Super 1 Foods - 2.6 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 75672).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Harrison County, TX?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.