Septic Work in Rural Coryell County Is a Permit, Not a Handshake
Outside city sewer service, Coryell County treats septic work as OSSF work. Construction, alteration, extension, or repair of an on-site sewage facility needs a permit and inspection, no matter the tract size.
The stated exception is an OSSF installed before September 1, 1989. Those older systems are grandfathered. For newer work, Cody Wallace is the septic contact for technical questions at 254-248-4845.
The same county page also handles floodplain issues. If the homesite is near a creek or mapped flood area, ask both questions early. Septic layout and floodplain limits can affect each other.
Content last revised 2026-07-11