Off-grid site report
Jasper County, TX
30.9066, -94.0148 · 246 ft elevationRead this before you act on anything below. This is my researched starting point for Jasper 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 rulesJasper County, TX
Zoning & raw-land occupancy
RestrictedJasper County has adopted a Unified Development Code with an Official Zoning Map covering unincorporated land, which is unusual for a Texas county; the Plan Commission and Zoning Administrator enforce it. source
Dwellings, tiny homes & RVs
Varies locallyPlacing a dwelling requires an Improvement Location Permit through the county's Zoning Administrator plus building-code review by the Building Official; specific tiny-home or RV-as-residence standards were not confirmed.
Building permits & codes
Varies locallyThere's no standalone general building-permit program described; compliance runs through the UDC's Improvement Location Permit and, in flood-prone areas, a separate floodplain development permit from the county's Floodplain Administrator. source
Septic & composting toilets
Generally allowedOSSFs are permitted under Texas Health and Safety Code Chapter 366 and 30 TAC Chapter 285; in Jasper County, ANRA permits within the Sam Rayburn Reservoir Control Zone and TCEQ Region 10 permits the rest of the county. source
Greywater reuse
Unclear - verifyNo standalone Jasper County greywater ordinance was found; it likely falls under the state's 30 TAC Chapter 285 OSSF framework, but this is not confirmed at the county level.
Rainwater harvesting
Generally allowedNo Jasper County restriction on rainwater harvesting was found, so the general Texas baseline supporting rainwater collection appears to apply.
Private wells & water rights
RestrictedJasper County sits entirely within the Southeast Texas Groundwater Conservation District; typical domestic wells are exempt from permitting and fees but must still be registered with the district.
Living disconnected from utilities
Unclear - verifyNo mandatory utility-connection ordinance for unincorporated Jasper County was found in the UDC sections reviewed; any such rule would more likely exist within an incorporated city like Jasper.
Sun30-year normals
- Peak-sun hours, annual average
- 5.2 hrs/day
- Worst month (sizes an off-grid array)
- 4.2 hrs/day
- Yearly output per 1 kW of panels
- 1,370 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 56 in/yr
- Snowfall
- 0 in/yr
- Heating degree days
- 1,927 (mild)
- Frost-free season
- Mar 9 to Nov 24
How far help isstraight-line
- Hospital
CHRISTUS Southeast Texas - Jasper Memorial - 0.3 mi
- Fire station
Tri - Community Volunteer Fire Department - 12.4 mi
- Hardware store
Lowe's - 0.2 mi
- Grocery
Walmart Supercenter - 0.1 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 75951).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Jasper 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.