Off-grid site report
Johnson County, TX
32.3391, -97.4127 · 807 ft elevationRead this before you act on anything below. This is my researched starting point for Johnson 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 rulesJohnson County, TX
Zoning & raw-land occupancy
Varies locallyJohnson County has no general zoning ordinance, but a Development Permit is required for residential and commercial use in unincorporated areas, per the County. Land near a city may fall in its ETJ with added requirements. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official county page specifies minimum dwelling size or RV/tiny-home standards; Texas counties lack authority to issue Certificates of Occupancy or run building inspections. Cities within the county may impose their own standards. source
Building permits & codes
Varies locallyThe County requires a Development Permit and, in flood-hazard areas, a floodplain permit through Public Works, but does not run full building-code inspections in unincorporated areas. Cities within the county set their own building codes and Certificates of Occupancy. source
Septic & composting toilets
Generally allowedState law (TCEQ, 30 TAC Chapter 285) requires an approved permit to construct or operate an OSSF, and Johnson County's subdivision rules require a septic site evaluation by a registered professional as part of the county permit process. Whether the county administers its own authorized-agent program versus TCEQ's regional office was not independently confirmed; ask Development Services. source
Greywater reuse
Unclear - verifyNo standalone Johnson County or TCEQ page addresses greywater; it appears folded into the general state OSSF rules. Not confirmed at the county level, so ask Development Services or TCEQ directly.
Rainwater harvesting
Generally allowedNo Johnson County ordinance restricting rainwater harvesting was found; the practice follows the general Texas state baseline supporting rainwater collection.
Private wells & water rights
RestrictedPrairielands Groundwater Conservation District, created by the Texas Legislature, regulates well drilling and registration in Johnson County, and the County's own development permit checklist notes a 2-acre minimum for a new well. source
Living disconnected from utilities
Unclear - verifyNo Johnson County ordinance mandating connection to electric, water, or sewer utilities was found for unincorporated land; this follows the state baseline of no statewide connection mandate, but city rules could differ if you're inside city limits or ETJ.
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
- 1,559 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 38 in/yr
- Snowfall
- 1 in/yr
- Heating degree days
- 2,450 (mild)
- Frost-free season
- Mar 24 to Nov 11
How far help isstraight-line
- Hospital
Texas Health Harris Methodist Hospital Cleburne - 1.6 mi
- Fire station
Cleburne Fire Department - 1.6 mi
- Hardware store
Rowlett's Hardware - 0.3 mi
- Grocery
Kroger - 0.1 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 76033).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Johnson 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.