Environmental Rules in Brazoria County, TX (2026)
3 county-level rules, plus city-specific rules for 1 city in Brazoria County, Texas.
Verified from official government sources
Stormwater Management
Unincorporated Brazoria County will not take responsibility for a subdivision's drainage beyond protecting its own roads. Developers must design drainage systems to the county's Drainage Criteria Manual, get sign-off from the applicable drainage district, and comply with the county's MS4 stormwater program or risk a shutdown.
Stormwater Drainage Rules in Brazoria County
Some RestrictionsBrazoria County Subdivision Regulations, § 4.06.A
A. Requirements 1. Responsibility for drainage will not be accepted by the County other than that accepted in connection with draining or protecting the road system and streets. 2. The drainage system shall be designed in accordance with the most recently adopted Drainage Criteria Manual, which is incorporated by reference as a part of these Subdivision Regulations or by the appropriate drainag...
Flood Zones
Brazoria County has no zoning power, but Section 5.01.A of its Subdivision Regulations requires every development in the unincorporated county to comply with the county's FEMA-required floodplain development regulations. The Floodplain Administrator enforces those rules, and every Preliminary Plat must include a 100-year floodplain map under Section 3.03.B.10 before the Engineering Department will move it toward a Final Plat.
Floodplain Development Rules in Brazoria County
Some RestrictionsBrazoria County Subdivision Regulations, §§ 5.01.A & 3.03.B.10
A. Development Regulations for Floodplain Management Brazoria County has adopted Development Regulations as required by FEMA which must be complied with in the development of Tracts of land or Building of any structure. Copies of these regulations may be obtained from the Floodplain Administrator or www.brazoriacountytx.gov/departments/floodplain. 10. ... 100-year floodplain map showing propose...
Flood Elevation Requirements
Lots in Brazoria County's designated floodplain can't get a development permit below the FEMA Base Flood Elevation. Appendix I, Item 2 of the county's Subdivision Regulations requires that ban to be printed as a note on the recorded plat itself, and Section 3.01.C.3 has the Floodplain Administrator set each subdivision's minimum slab elevation from the latest FEMA guidance.
Base Flood Elevation Rules in Brazoria County
Significant RestrictionsBrazoria County Subdivision Regulations, App. I Item 2 & § 3.01.C.3
2) Floodplain: ... The following note shall appear on the face of the plat, "Structures built on lots in the designated floodplain must be elevated to the FEMA Base Flood Elevation (BFE). No development permits will be issued below the BFE. Contact the Floodplain Administrator's Office for specific information." 3. ... Minimum Slab Elevation The Floodplain Administrator will set the minimum sla...
Environmental Rules by City in Brazoria County
1 cities in Brazoria County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
All Brazoria County ordinances
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