Off-grid site report
Coryell County, TX
31.4255, -97.7151 · 866 ft elevationRead this before you act on anything below. This is my researched starting point for Coryell 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 rulesCoryell County, TX
Zoning & raw-land occupancy
Unclear - verifyCoryell County has no general zoning ordinance; it regulates mainly through subdivision/platting rules adopted under state law, which apply more to newly platted lots than to a single unplatted rural parcel. Incorporated cities within the county have their own zoning that overrides county rules. source
Dwellings, tiny homes & RVs
Unclear - verifyNo countywide minimum house size or tiny-home/RV ordinance was confirmed; subdivision rules address setbacks and frontage mainly at the platting stage. The county was reportedly discussing RV park standards, but nothing final was found on the official site. source
Building permits & codes
Unclear - verifyNo official countywide building-code adoption was found; the Environmental Department issues floodplain development permits and the subdivision code requires driveway/access permits, but general construction permitting outside those is not confirmed. Ask the Coryell County Environmental Department directly. source
Septic & composting toilets
Generally allowedCoryell County acts as TCEQ's authorized agent, enforcing state OSSF rules (30 TAC Chapters 285 and 30, Health & Safety Code Chapter 366, and Water Code Chapters 7 and 37) for septic systems. Composting toilets aren't separately addressed and would likely fall under this same framework; confirm with the Environmental Department. source
Greywater reuse
Unclear - verifyNo standalone Coryell County greywater rule was found; it's presumably covered under the same adopted state OSSF chapter (30 TAC 285) that the county enforces for septic systems generally. source
Rainwater harvesting
Generally allowedNo county ordinance restricting rainwater harvesting was found; Texas generally supports rainwater collection at the state level, and the county's subdivision paperwork only references water/sewage service availability as a plat disclosure item.
Private wells & water rights
Varies locallyPrivate wells in Coryell County are regulated by the Middle Trinity Groundwater Conservation District under Texas Water Code Chapter 36, covering registration, permitting thresholds, and spacing. Confirm directly with MTGCD which specific rules apply to your parcel, since an earlier, differently named district was also tied to the county. source
Living disconnected from utilities
Unclear - verifyNo county mandate requiring grid utility hookups for unincorporated land was found; the 'availability of water and sewage service' language in subdivision rules is a disclosure item for new plats, not a documented blanket occupancy requirement. source
Sun30-year normals
- Peak-sun hours, annual average
- 5.5 hrs/day
- Worst month (sizes an off-grid array)
- 4.1 hrs/day
- Yearly output per 1 kW of panels
- 1,532 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 36 in/yr
- Heating degree days
- 2,342 (mild)
- Frost-free season
- Mar 14 to Nov 21
How far help isstraight-line
- Hospital
Coryell Memorial Healthcare System - 3.9 mi
- Fire station
Gatesville Fire Department - 1.1 mi
- Hardware store
Ace Hardware - 0.1 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 76599).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Coryell 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.