Texas Bill Allows Counties to Regulate Hard Surfaces

HB 117 is a state law that expands what county commissioners can do to manage flooding and water in rural areas. Right now, counties have limited power over impervious cover—hard surfaces like concrete, asphalt, roofs, and parking lots that prevent water from soaking into the ground. When rain falls on these surfaces, water runs off quickly and can cause flooding downstream.

This bill gives county commissioners the authority to set rules about impervious cover in unincorporated areas, which are parts of the county outside city limits. Counties could use this power to reduce flood risk, improve drainage systems, and encourage nature-based solutions like rain gardens, green roofs, and permeable pavements that let water soak in naturally.

The law has four main purposes. First, it helps protect communities by reducing flood risk. Second, it supports the development of flood prevention projects. Third, it improves drainage infrastructure. Fourth, it promotes features based on nature—like wetlands and vegetation—that naturally reduce flooding and filter stormwater.

This change matters for our community because unincorporated areas often have fewer protections than cities do. Giving counties this new tool helps them plan better for heavy rain and protect more people from flooding. The bill takes effect 91 days after the legislative session ends, which means implementation could begin soon.

This supports

Also in this area