Floodplain Regulations in Effect

Floodplain Regulations in Effect

The City of Houston’s floodplain regulations went into effect on September 1st, 2018. Below is a high-level overview of the effective changes.

Regulated Area

Previously, Houston’s code applied to property in the 100-year floodplain. The new revisions include the 500-year floodplain.


The existing Chapter 19 regulations required a finished floor elevation at the 100-year floodplain elevation plus one foot. The updated regulations require a minimum elevation at the 500-year floodplain level plus two feet.

Zero Net Fill

Zero net fill restrictions previously applied to property in the 100-year flood zone. The new regulations will extend the zero net fill criteria to the 500-year flood zone.

For more details on the new regulations, read our previous blog post. Contact us if you would like to speak to an engineer about how these regulations may affect you.