Off-grid site report
Rockwall County, TX
32.9004, -96.4618 · 551 ft elevationRead this before you act on anything below. This is my researched starting point for Rockwall 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 rulesRockwall County, TX
Zoning & raw-land occupancy
Unclear - verifyRockwall County has no countywide zoning ordinance for unincorporated land, per Texas counties' limited zoning authority; the county instead regulates via subdivision, floodplain, and site development permitting under Texas Local Government Code Chapter 232. Cities in the county have their own separate zoning that applies inside city limits/ETJ. source
Dwellings, tiny homes & RVs
Unclear - verifyNo county-specific minimum dwelling size or RV-occupancy rule was found; the county's 'Construction or Expansion of a Residential Use Notice' is described as a notice, not a permit. Confirm with Rockwall County Development Services.
Building permits & codes
Varies locallyThe county's fire code requires a building permit reviewed by the Fire Marshal for commercial, public, or multifamily (4+ unit) buildings; whether single-family homes need a separate structural permit beyond OSSF/driveway approval is not clearly confirmed on the county site. source
Septic & composting toilets
RestrictedRockwall County's Environmental Health Coordinator administers On-Site Sewage Facility permits as TCEQ's authorized local agent, requiring 1.5 acres of usable land per system and maintenance contracts for aerobic systems. source
Greywater reuse
Unclear - verifyNo standalone Rockwall County greywater ordinance was found; greywater likely falls under the state's TCEQ OSSF program (30 TAC 285). Confirm with the county's Environmental Health Coordinator. source
Rainwater harvesting
Generally allowedNo Rockwall County ordinance restricts rainwater harvesting; state-level TWDB encouragement and TCEQ backflow/cross-connection rules form the baseline.
Private wells & water rights
Generally allowedRockwall County is not within a groundwater conservation district (unlike neighboring Collin, Cooke, and Denton counties under North Texas GCD), so statewide TDLR well-construction and registration rules apply without a local well permit layer.
Living disconnected from utilities
Unclear - verifyNo official Rockwall County page requires connection to electric, water, or sewer utilities for unincorporated land; the main county requirement for a residence is a compliant septic (OSSF) permit. Cities may impose their own hookup rules inside city limits.
Sun30-year normals
- Peak-sun hours, annual average
- 5.5 hrs/day
- Worst month (sizes an off-grid array)
- 4.5 hrs/day
- Yearly output per 1 kW of panels
- 1,539 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 41 in/yr
- Heating degree days
- 2,416 (mild)
- Frost-free season
- Mar 10 to Nov 24
How far help isstraight-line
- Hospital
North Central Surgical Center - 18.0 mi
- Fire station
Rowlett Fire Station No. 3 - 4.6 mi
- Hardware store
Jabo's Ace Hardware - 3.6 mi
- Grocery
Sprouts Farmers Market - 0.8 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 75032).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Rockwall 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.