Off-grid site report
Llano County, TX
30.7529, -98.6755 · 988 ft elevationRead this before you act on anything below. This is my researched starting point for Llano 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 rulesLlano County, TX
Zoning & raw-land occupancy
Varies locallyLlano County has no countywide zoning; it regulates subdivisions, floodplain development, and septic permitting instead. Zoning only exists inside incorporated cities like the City of Llano. source
Dwellings, tiny homes & RVs
RestrictedThe County requires a Development Permit before building a new home, mobile home, or similar structure, tied to floodplain review. Standalone tiny-home or RV-as-residence rules on private land were not confirmed. source
Building permits & codes
RestrictedA development permit is required before construction starts, and it expires if work doesn't begin in time. Whether a full residential building code has been adopted beyond this permit process was not confirmed. source
Septic & composting toilets
Generally allowedSeptic systems are permitted through Llano County's Department of Natural Resources/Environmental Health, acting as TCEQ's local agent under the state's 30 TAC Chapter 285 program. The County won't issue septic or development permits for property in an unrecorded subdivision. source
Greywater reuse
Unclear - verifyGreywater isn't separately addressed locally; it falls under the same state OSSF framework as septic. No Llano County-specific greywater rule was found, so ask Environmental Health if you have a specific setup in mind.
Rainwater harvesting
Generally allowedNo county ordinance restricts rainwater harvesting, and the state actively encourages it. No Llano-specific added rule was found.
Private wells & water rights
Varies locallyMuch of Llano County appears to lie outside any groundwater conservation district, meaning rule of capture applies, but a claim that Central Texas GCD covers part of the county was not officially confirmed. Check your specific parcel against the Texas Water Development Board's GCD map. source
Living disconnected from utilities
Unclear - verifyNo general county rule forces individual homes to connect to utilities. The only forced-utility rule found applies to manufactured home rental communities, not single homesteads.
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
- 1,555 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 28 in/yr
- Snowfall
- 0 in/yr
- Heating degree days
- 2,058 (mild)
- Frost-free season
- Mar 24 to Nov 10
How far help isstraight-line
- Hospital
Baylor Scott & White Medical Center - Llano - 0.7 mi
- Fire station
Buchanan Dam Voulnteer Fire Department - 12.8 mi
- Hardware store
- none within range
- Grocery
Lowe's Market - 0.4 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 78643).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Llano 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.