Off-grid site report
Kendall County, TX
29.9977, -98.8139 · 1,696 ft elevationRead this before you act on anything below. This is my researched starting point for Kendall 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 rulesKendall County, TX
Zoning & raw-land occupancy
Generally allowedKendall County has no countywide zoning in unincorporated areas, per the county's own permitting guidance, though deed restrictions, HOAs, and municipal ETJ rules can still apply. source
Dwellings, tiny homes & RVs
Varies locallyNo county residential building code governs dwelling type, tiny homes, or RVs directly; county control comes through the development-permit process (address, access, lighting, septic) rather than a structure review. Specific size/occupancy limits are not confirmed on an official county page. source
Building permits & codes
RestrictedNo general building code is enforced in unincorporated Kendall County, but a Development Permit is required before any property development, including before septic or well permits are issued. Boerne runs its own building code within city limits and ETJ. source
Septic & composting toilets
Generally allowedSeptic (OSSF) systems are permitted and administered by the Kendall County Health Department under statewide TCEQ rules (30 TAC 285), which set a one-acre minimum lot size where not on public water; a referenced 10-acre exemption needs confirmation from a licensed evaluator and the county. source
Greywater reuse
Unclear - verifyNo standalone Kendall County or TCEQ greywater program was found; it appears to fall under the general OSSF framework. Confirm directly with the county Health Department.
Rainwater harvesting
Generally allowedNo Kendall County-specific restriction on rainwater harvesting was found, and the state baseline is permissive; specific system standards tied to development permits are not confirmed.
Private wells & water rights
RestrictedAll of Kendall County falls under the Cow Creek Groundwater Conservation District, which regulates well drilling and production and requires registration even for exempt domestic wells; a county Development Permit is also required before a well permit is issued.
Living disconnected from utilities
Generally allowedNo county-level rule was found requiring connection to electric, water, or sewer in unincorporated Kendall County; any mandatory hookup rule would come from a municipality like Boerne, not the county. source
Sun30-year normals
- Peak-sun hours, annual average
- 5.5 hrs/day
- Worst month (sizes an off-grid array)
- 4.3 hrs/day
- Yearly output per 1 kW of panels
- 1,529 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 38 in/yr
- Heating degree days
- 2,049 (mild)
- Frost-free season
- Mar 20 to Nov 14
How far help isstraight-line
- Hospital
Methodist Boerne Emergency Center - 16.4 mi
- Fire station
Waring Volunteer Fire Department - 3.3 mi
- Hardware store
The Home Depot - 15.8 mi
- Grocery
Lowe's Market - 6.0 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 78074).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Kendall 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.