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

No, unincorporated Randall County does not require a general residential building permit; county review instead centers on subdivision plats, road access and floodplain development¹. Texas residential-code rules can apply only when an eligible county adopts the required order, and the available sources do not confirm that Randall County did so⁹. If that state-law program does apply to a new house on a vacant lot, the builder must arrange at least three inspections—for the foundation, framing and mechanical systems, and completed work—rather than obtain county approval before construction⁹. Amarillo separately enforces its residential code within the city, and that rule does not extend to unincorporated Randall County¹⁰; septic permits stay with the Amarillo Area Public Health District in either place⁶. A Randall County Floodplain Development Permit is still required before any development begins, and an approved plat may be required before land can be offered as building lots^1,3.

Randall County Road & Bridge issues floodplain development permits and driveway/culvert access permits and takes county plat submittals; the county has no building department for residential building permits^1,3. The office is at 301 W Highway 60, Canyon, TX 79015, and the phone number is 806-655-3861³. No construction may begin until a Floodplain Development Permit is issued: Class A applies outside the mapped 100-year floodplain, while Class B applies when property lies partly or wholly inside it³. Plat documents for the Commissioners Court agenda must reach the Road Superintendent by 5 p.m. on the preceding Tuesday, except that plats in Amarillo's ETJ bypass the Randall County Commissioners Court¹¹. County subdivision application fees follow the Commissioners Court's amendable fee schedule, and review, inspection or third-party testing can add variable charges¹. Septic permits are not a county permit and go instead to the Amarillo Area Public Health District⁶.

No, Randall County has no zoning ordinance in unincorporated areas¹, while the cities of Amarillo and Canyon each adopt zoning districts for land inside their city limits^4,5. Outside Amarillo and Canyon, however, Randall County regulates plats and subdivisions: land cannot be laid out or sold as building lots without the required approval, and a street number generally will not be issued for a building without an approved plat unless an exception applies¹. The county sets no zoning-based minimum home size, setbacks or building-height limit on unincorporated land². RVs, tiny homes, manufactured homes and temporary camping are likewise unrestricted by county zoning, but floodplain, access, plat and septic requirements remain separate questions^1,2,3. A division into parts larger than 10 acres can avoid platting only when every part has access and no public improvement is dedicated¹¹.

Every OSSF in Randall County needs a permit from the Amarillo Area Public Health District, which Randall County has authorized by county order to permit and inspect septic systems, alongside Potter County⁶. Lot size matters here in a way most Texas counties don't specify: a property with a private water well needs at least 1 acre, and a property on a public water supply needs at least 1/2 acre, though exceptions may apply to lots platted before 1988⁶. Homeowners can install or repair their own OSSF for a single-family residence they occupy, but rental properties, leased dwellings, or commercial operations must use a licensed installer, and every permit requires paying fees at submission⁶. An Authorization to Construct is valid for one calendar year, and the system must pass inspection within that window or a new permit is required⁶. Soils here are relatively more forgiving than many Texas counties: 22.3% of Randall County's land is free of severe limitations for a conventional drain field, though that still leaves most of the county needing a closer look before you count on a standard system⁸. Every OSSF also requires a 9-1-1 assigned address before you can get a permit⁶. If your land instead needs a well, portions of Randall County fall under the High Plains Underground Water Conservation District No. 1, which requires a permit before drilling any well expected to produce 17.5 gallons per minute or more¹².

Unincorporated Randall County has no zoning ordinance restricting RV or tiny-home occupancy and no county zoning minimum for home size². That does not remove the development process: every project needs the applicable Class A or Class B Floodplain Development Permit before work begins³. Land undergoing subdivision review must also have adequate facilities or a plan to provide them; that rule does not require every existing parcel to connect to public water or sewer¹. A private OSSF is allowed for a single-family residence when the owner obtains the required septic approval and meets the sanitation rules⁶. County subdivision rules also require satisfactory vehicular access, and a shared driveway serving multiple lots must meet county street standards¹.

First, ask Road & Bridge which Floodplain Development Permit applies; every project needs one before construction, with Class A used outside the mapped 100-year floodplain and Class B used for property partly or wholly inside it³. Second, verify that the parcel has an approved plat or qualifies for an exception before relying on it as a building site¹. Third, order a septic site evaluation; only 22.3% of county soils lack severe limitations for a conventional drain field⁸. Fourth, obtain a 9-1-1 address and apply to the Amarillo Area Public Health District for the OSSF permit⁶. Fifth, apply through the Randall County Road Department for a driveway permit, giving 24-hour notice before right-of-way work, and confirm the $200 fee plus any payment-processing charge^7,13. Finally, ask Road & Bridge whether the conditional state residential-inspection program applies to the project, because the available sources do not confirm Randall County adopted it⁹.

Water deserves an early feasibility check: annual precipitation is about 19 inches, and severe drought occurs in 37.9% of years⁸. Only 22.3% of county soils lack severe limitations for a conventional septic drain field, so do not assume a standard system will fit the site⁸. Portions of Randall County fall within the High Plains Underground Water Conservation District, where a well expected to produce at least 17.5 gallons per minute requires a permit; the cited rule does not establish requirements outside the district¹². Check the flood map because it determines the permit class, not whether a county floodplain permit is needed³. Confirm that any recently divided tract has the required county approval and ask for the current subdivision fee schedule, since review, inspection and third-party testing charges vary¹. The effective property-tax rate is about 1.6%, and the median annual bill is about $3,587⁸.