Off-grid site report
Dimmit County, TX
28.5224, -99.8610 · 610 ft elevationRead this before you act on anything below. This is my researched starting point for Dimmit 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 rulesDimmit County, TX
Zoning & raw-land occupancy
Generally allowedDimmit County has no general zoning authority over unincorporated land, per the state framework in Local Government Code Chapter 211; only incorporated cities within the county can zone. Confirm parcel-specific status with the county or relevant city. source
Dwellings, tiny homes & RVs
Unclear - verifyNo county ordinance on tiny homes, minimum dwelling size, or RV occupancy was found; Texas has no statewide minimum size, but county rules aren't confirmed. Ask the Dimmit County Grants and Planning Department directly.
Building permits & codes
Unclear - verifyNo published countywide building code was found; counties may adopt one but aren't required to. If your lot is platted, state law (Local Government Code Chapter 232) still requires the county to issue permits to qualifying applicants. source
Septic & composting toilets
Generally allowedSeptic (OSSF) systems are permitted and regulated under Texas Health and Safety Code Chapter 366 and TCEQ rules (30 TAC Chapter 285), but whether Dimmit County or the TCEQ regional office issues the actual permit locally is not confirmed. source
Greywater reuse
Generally allowedGreywater reuse is addressed under the same state OSSF rules (TCEQ Subchapter H) as septic systems; no separate county greywater ordinance was found. source
Rainwater harvesting
Generally allowedRainwater harvesting is listed as a program priority by the Winter Garden Groundwater Conservation District, which covers Dimmit County, and no county restriction was found.
Private wells & water rights
RestrictedWells draw from the Carrizo-Wilcox Aquifer and are regulated by the Winter Garden Groundwater Conservation District, which has authority over well spacing and production, so registration and compliance with district rules is required rather than open rule-of-capture access. source
Living disconnected from utilities
Generally allowedNo county ordinance requiring connection to grid electric, water, or sewer was found for unincorporated Dimmit County land; incorporated towns may set their own rules within city limits.
Sun30-year normals
- Peak-sun hours, annual average
- 5.7 hrs/day
- Worst month (sizes an off-grid array)
- 4.6 hrs/day
- Yearly output per 1 kW of panels
- 1,577 kWh
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Weather1991-2020
- Precipitation
- 20 in/yr
- Snowfall
- 0 in/yr
- Heating degree days
- 1,318 (mild)
- Frost-free season
- Feb 22 to Dec 3
How far help isstraight-line
- Hospital
Dimmit Regional Hospital - 0.2 mi
- Fire station
- none within range
- Hardware store
- none within range
- Grocery
H-E-B - 1.2 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 78834).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Dimmit 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.