The floodplain line is not the edge of Hays County permit review
A flood map is not the edge of county review. In rural Hays County, clearing, dirt work, fill, roads, slabs, sheds, pools, and parking may need a permit. This can be true inside or outside the floodplain.
One key exception covers indoor work on a single-family home outside the floodplain. That work does not need a county development permit. Fire, septic, drive, or land-split rules may still apply.
A call to Development Services belongs near the start of the plan. The type of work and the lot decide which county permits you need.
Content last revised 2026-07-11