Off-grid site report
Hamilton County, TX
31.7031, -98.1238 · 1,181 ft elevationRead this before you act on anything below. This is my researched starting point for Hamilton 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 rulesHamilton County, TX
Zoning & raw-land occupancy
Unclear - verifyTexas counties generally lack zoning authority over unincorporated land, and no Hamilton County zoning ordinance was found. The City of Hamilton has zoning/subdivision/flood ordinances, but only inside city limits.
Dwellings, tiny homes & RVs
Unclear - verifyNo Hamilton County rule on tiny homes, minimum dwelling size, or RV occupancy was found; not confirmed whether the county has adopted any residential construction standards under the state's limited enabling authority.
Building permits & codes
Unclear - verifyNo countywide building permit system was found for unincorporated Hamilton County; the City of Hamilton runs its own permitting and inspections, but only within city limits. source
Septic & composting toilets
Generally allowedOSSFs (septic systems, holding tanks) require a permit under state rules enforced via a local permitting authority; TCEQ itself often is not that authority, and I could not confirm which office handles it for Hamilton County, so ask the county. A state exemption exists for qualifying 10+ acre parcels under 30 TAC 285. source
Greywater reuse
Unclear - verifyNo separate greywater rule was found; it appears to fall under the same OSSF/30 TAC 285 septic framework rather than its own program.
Rainwater harvesting
Generally allowedNo Hamilton County restriction on rainwater harvesting was found, and Texas generally supports it at the state level as a baseline. source
Private wells & water rights
Varies locallyTexas follows the rule of capture for groundwater unless the property sits inside a groundwater conservation district, which can add permitting and spacing rules. I could not confirm whether Hamilton County lies within a GCD, use the state locator to check. source
Living disconnected from utilities
Unclear - verifyNo state law and no Hamilton County ordinance requiring utility hookups was found; such requirements, if any, more typically come from an HOA or a city rather than the county.
Sun30-year normals
- Peak-sun hours, annual average
- 5.6 hrs/day
- Worst month (sizes an off-grid array)
- 4.5 hrs/day
- Yearly output per 1 kW of panels
- 1,566 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 33 in/yr
- Heating degree days
- 2,430 (mild)
- Frost-free season
- Mar 22 to Nov 14
How far help isstraight-line
- Hospital
Hamilton General Hospital - 0.6 mi
- Fire station
Hamilton Volunteer Fire Department - 0.1 mi
- Hardware store
True Value - 0.5 mi
- Grocery
Brookshire Brothers - 0.8 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 76531).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Hamilton 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.
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