Off-grid site report
Aransas County, TX
28.0464, -97.0430 · 36 ft elevationRead this before you act on anything below. This is my researched starting point for Aransas 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 rulesAransas County, TX
Zoning & raw-land occupancy
Varies locallyAransas County has no general zoning ordinance for unincorporated land, per state baseline, but the Commissioners' Court has adopted subdivision regulations under Texas Local Government Code Ch. 212/232. Land inside Rockport, Fulton, Aransas Pass, or Port Aransas city limits/ETJ follows that city's zoning instead. source
Dwellings, tiny homes & RVs
Unclear - verifyNo Aransas County rule on tiny-home minimum size or RV occupancy for unincorporated land was found; this is not confirmed. Cities like Aransas Pass have their own manufactured-home zoning districts.
Building permits & codes
Unclear - verifyNo county building-code adoption page for unincorporated Aransas County was found, so this is not confirmed; ask the county directly. Cities such as Aransas Pass enforce International Code-based permitting. source
Septic & composting toilets
Generally allowedAransas County's Environmental Health Department administers OSSF permits under state authorization (1987 state law, TCEQ oversight), including required forms like the OSSF septic profile. source
Greywater reuse
Unclear - verifyNo Aransas County-specific greywater policy was found; it appears to fall under the same state OSSF framework (30 TAC Ch. 285) rather than a standalone county program. source
Rainwater harvesting
Generally allowedNo Aransas County ordinance restricting rainwater harvesting was found, so the state's generally permissive stance applies by default.
Private wells & water rights
Varies locallyTexas statute created an Aransas County Groundwater Conservation District, but it required a confirmation election by September 2019 or automatic dissolution; whether voters confirmed it and the district is currently active is not confirmed, verify with the county or Texas Water Development Board. If lapsed, the state's default rule of capture applies. source
Living disconnected from utilities
Unclear - verifyNo Aransas County ordinance requiring utility hookups for unincorporated land was found; this is not confirmed at the county level. Some nearby cities have RV-specific utility-disconnection rules.
Sun30-year normals
- Peak-sun hours, annual average
- 5.5 hrs/day
- Worst month (sizes an off-grid array)
- 3.9 hrs/day
- Yearly output per 1 kW of panels
- 1,535 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 35 in/yr
- Heating degree days
- 876 (mild)
- Frost-free season
- Jan 26 to Dec 29
How far help isstraight-line
- Hospital
Refugio County Memorial Hospital - 23.1 mi
- Fire station
Aransas County Fire Marshal's Office - 1.5 mi
- Hardware store
Ace Hardware - 0.5 mi
- Grocery
Walmart Supercenter - 0.2 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 78358).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Aransas 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.