Building permits, zoning and land rules in Robertson County, Texas

An ordinary single-family home in unincorporated Robertson County does not go through a general county residential building-permit program². Even where a Texas county adopts the conditional state residential-construction framework, that framework does not authorize prior county approval before new residential construction begins¹. That answer concerns a building permit, not every approval tied to a project: Robertson County separately regulates subdivision plats, lists zoning permits and generally requires a septic permit for OSSF work^3,5. The state owner-builder provision is narrow: for a person building or acting as contractor on an intended primary residence, it conditionally protects against a notice penalty rather than creating a general exemption from standards, inspections, septic rules, subdivision rules or municipal requirements¹.

Robertson County does not publish a general residential building-permit authority for unincorporated land². For a zoning permit, floodplain question or rural address, call Robertson County 9-1-1 Rural Addressing, Floodplain and Zoning at (979) 828-6654³. Inside a city, ask that city's building department about its building permit and zoning approval; for subdivision plats in the named city extraterritorial jurisdictions, city policies apply³. Septic permits do not shift to those city departments: the Robertson County OSSF Program administers septic permits countywide and publishes the application and instructions². For a groundwater well, the Brazos Valley Groundwater Conservation District lists exempt-well and non-exempt-well application routes⁷.

Robertson County identifies a county contact for zoning permits associated with subdivision and land-development review, but the available material does not publish an underlying zoning ordinance, districts or permit criteria³. Unincorporated Robertson County appears to have no county zoning ordinance, and we could not confirm any county rule on minimum dwelling size, minimum lot size, setbacks, lot coverage or building height^2,9. Ask Robertson County 9-1-1 Rural Addressing, Floodplain and Zoning whether the proposed use needs zoning approval or floodplain review before fixing a site plan³. Subdivision location matters: plats within the specified extraterritorial jurisdictions of Bremond, Hearne, Calvert or Franklin follow those cities' policies, while the Robertson County OSSF Program continues to handle septic permits countywide^2,3.

Robertson County administers OSSF permitting and generally requires a septic permit before a system is constructed, installed, altered, extended or repaired^2,5. The Robertson County OSSF Program publishes its OSSF Order, permit application and application-process instructions². The residential application fee is $300 and the commercial application fee is $500 under the schedule effective September 1, 2025². Authorized agents or their designated representatives inspect installation, but the material does not establish recurring inspection of every existing system¹⁰. Only 28.2% of county soils are rated without severe limits for a conventional drain field, so make the site evaluation an early feasibility step¹¹. A narrow exemption can apply on at least 10 acres when every condition is satisfied, including the single-dwelling and 100-foot property-line conditions⁵.

We could not confirm a general county zoning rule on RV occupancy, tiny-home occupancy, accessory dwellings, manufactured-home occupancy or temporary camping on unincorporated Robertson County land, and the county appears to have no zoning ordinance². Because Robertson County nevertheless lists zoning permits without publishing their criteria, ask Rural Addressing, Floodplain and Zoning about the specific parcel and proposed use³. Private deed restrictions, municipal rules and floodplain review can also affect a project. Septic remains separate from zoning: off-grid sanitation runs through the Robertson County OSSF Program, and a septic permit and approved plan are generally required unless every condition of a specific exemption is met^2,5. A tiny home built as industrialized housing falls under the statewide industrialized-building program, and a purchaser acquiring an industrialized unit for personal use may need an installation permit^12,13.

1. Confirm whether the parcel is unincorporated, then ask Rural Addressing, Floodplain and Zoning about a zoning permit, rural address and floodplain review³.

1. If land is being divided, contact the precinct commissioner and resolve county subdivision-plat review or the applicable city-ETJ policy³.

1. Arrange the septic site evaluation early because only 28.2% of county soils rate without severe limits for a conventional drain field¹¹.

1. Follow the published OSSF application process before septic construction and budget the $300 residential fee unless every condition of an exemption is met^2,5.

1. For a well, use the groundwater district path that matches the well classification^7,8.

1. If access connects to a state highway, submit Form 1058 to TxDOT and wait for an executed driveway permit before right-of-way work¹⁴.

Start with jurisdiction and access: determine whether the tract is unincorporated, lies in a named city ETJ, needs subdivision-plat review, or fronts a state highway^3,14. Ask the county office whether a zoning permit, rural address or floodplain review applies to the parcel³. Test wastewater feasibility early; only 28.2% of county soils rate without severe limits for a conventional drain field¹¹. Domestic or livestock wells incapable of producing more than 50,000 gallons per day fall within the district's exempt-well classification, but the district still provides an application to drill or register that well⁷. Qualifying agricultural land may receive productivity-value appraisal after the required agricultural or timber history, but that tax treatment is not an exemption from septic, subdivision or development rules¹⁵.