Off-grid site report
Reagan County, TX
31.1874, -101.4262 · 2,651 ft elevationRead this before you act on anything below. This is my researched starting point for Reagan 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 rulesReagan County, TX
Zoning & raw-land occupancy
Generally allowedTexas counties, including Reagan County, lack general zoning authority over unincorporated land. No county zoning ordinance was found; only the city of Big Lake could zone within its limits or ETJ, and that isn't confirmed for rural tracts. source
Dwellings, tiny homes & RVs
Unclear - verifyNo Reagan County ordinance on minimum dwelling size, tiny homes, or RV occupancy was found. Texas allows counties limited permissive authority to set residential construction standards in unincorporated areas since 2009, but it's not confirmed Reagan County has used that power.
Building permits & codes
Unclear - verifyNo evidence Reagan County has adopted a building code or requires permits in unincorporated areas; Texas has no statewide building code and adoption is optional per county. The Commissioners Court page lists no building/permitting department. source
Septic & composting toilets
Generally allowedSeptic (OSSF) systems statewide require a TCEQ permit and approved plan. Reagan County isn't confirmed as a TCEQ-delegated Authorized Agent county, so permitting likely runs through TCEQ's regional office; a 10-acre exemption exists if strict conditions are met. source
Greywater reuse
Unclear - verifyNo standalone Reagan County or TCEQ greywater program was found; greywater appears to be governed under the same state OSSF/septic rules rather than a separate permit.
Rainwater harvesting
Generally allowedNo Reagan County ordinance restricts rainwater harvesting, and Texas state policy generally encourages it.
Private wells & water rights
Varies locallyReagan County is split between the Santa Rita Underground Water Conservation District and the Glasscock Groundwater Conservation District, each setting its own well permitting and spacing rules under state law; all wells statewide need a licensed driller and a State Well Report filed with TDLR. source
Living disconnected from utilities
Unclear - verifyNo state law or Reagan County ordinance was found mandating utility hookups in unincorporated areas; any such requirement would more likely come from a City of Big Lake ordinance for in-town property.
Sun30-year normals
- Peak-sun hours, annual average
- 6.1 hrs/day
- Worst month (sizes an off-grid array)
- 4.9 hrs/day
- Yearly output per 1 kW of panels
- 1,712 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 19 in/yr
- Snowfall
- 2 in/yr
- Heating degree days
- 2,597 (mild)
- Frost-free season
- Mar 27 to Nov 10
How far help isstraight-line
- Hospital
Reagan Hospital District - 2.3 mi
- Fire station
New Big Lake Fire Dept - 2.2 mi
- Hardware store
Ace Hardware - 2.0 mi
- Grocery
Lowes' Grocery - 2.0 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 76930).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Reagan 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.