5 county-level rules, plus city-specific rules for 4 cities in Montgomery County, Texas.
Verified from official government sources
Montgomery County enforces stormwater management under its MS4 permit with TCEQ. Post-Harvey 2017 rules increased detention and floodplain standards. Conroe and The Woodlands have strict drainage criteria for development.
Montgomery County requires erosion and sediment controls for land-disturbing activities over 1 acre under TCEQ Construction General Permit. Conroe applies stricter 10,000 sq ft threshold. Piney Woods soils are highly erodible.
TCEQ Construction General Permit TXR150000 (effective March 5, 2023)
Stormwater General Permit for Construction Activities Stormwater permit requirements for the discharge of stormwater associated with construction activities that disturb one (1) or more acres of soil. 2023 CGP TXR150000 TCEQ issued the renewal of the CGP with an effective date of March 5, 2023. Construction activities are regulated under the CGP if they discharge stormwater to any surface wa...
Montgomery County is inland and not within the Texas Coastal Management Zone. No coastal development permits apply. Lake Conroe, Spring Creek, and San Jacinto floodplain rules govern waterfront development instead.
Montgomery County participates in FEMA's National Flood Insurance Program. The San Jacinto River Authority manages regional flood control including Lake Conroe. New floodplain regulations take effect October 1, 2025. All development within the 100-year floodplain requires a county development permit.
Montgomery County regulates grading and drainage under the Drainage Criteria Manual and Subdivision Rules. Permits required for significant earthwork. No redirecting runoff onto neighbors. Lake Conroe watershed has stricter controls.
Tex. Local Government Code Sec. 232.003 (Subdivision Requirements - County Drainage Standards)
Sec. 232.003. SUBDIVISION REQUIREMENTS. By an order adopted and entered in the minutes of the commissioners court, and after a notice is published in a newspaper of general circulation in the county, the commissioners court may:(1) require a right-of-way on a street or road that functions as a main artery in a subdivision, of a width of not less than 50 feet or more than 100 feet;(2) requir...
4 cities in Montgomery County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
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