La Porte, TX Environmental Rules: Erosion Control (2026)
Key Facts
- Drainage Plan
- Required for new construction
- Neighbor Impact
- Cannot divert water to adjacent lots
- Flood District
- Harris County Flood Control District
- Detention
- May be required for larger projects
- Soil Type
- Clay soils with high water table
Summary
La Porte requires that grading and drainage changes on residential properties do not adversely affect neighboring properties or the public storm sewer system. A grading permit or drainage plan may be required for significant earthwork. The city's drainage standards are enforced through the building permit process and coordinate with Harris County Flood Control District requirements.
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) require a right-of-way on any other street or road in a subdivision of not less than 40 feet or more than 70 feet;(3) require that the shoulder-to-shoulder width on collectors or main arteries within the right-of-way be not less than 32 feet or more than 56 feet, and that the shoulder-to-shoulder width on any other street or road be not less than 25 feet or more than 35 feet;(4) adopt
Full Breakdown
La Porte's grading and drainage regulations ensure that land development does not increase flood risk or divert stormwater onto neighboring properties. Property owners may not grade, fill, or alter their lots in a way that changes established drainage patterns to the detriment of adjacent properties. For new construction or substantial improvements, a drainage plan must be submitted as part of the building permit application showing existing and proposed grading, drainage flow paths, and any retention or detention features. The plan must demonstrate that post-development runoff does not exceed pre-development rates.
The city may require on-site detention for larger projects. La Porte is within the jurisdiction of the Harris County Flood Control District, which sets watershed-level drainage standards and maintains regional channels and detention basins. Development within FEMA-designated floodplains is subject to additional restrictions on fill and grading under the flood damage prevention ordinance. Drainage must be directed to the city's storm sewer system or approved drainage channels, not to the sanitary sewer system. Driveway culverts and drainage structures within the public right-of-way require city approval.
Given La Porte's flat topography, clay soils, and high water table, proper grading is critical to preventing standing water and foundation damage. The city's Public Works department oversees drainage infrastructure and may inspect private property grading that affects public drainage systems.
Violations & Fines
Altering drainage patterns that cause flooding on neighboring properties is a code violation and may expose the property owner to civil liability for damages. Unauthorized grading or filling in the floodplain carries fines up to $500 per day. Blocking or modifying public drainage infrastructure without a permit is a violation enforceable by Public Works. Discharging stormwater into the sanitary sewer is prohibited.
Frequently Asked Questions
Can I add fill dirt to raise my yard in La Porte?
Who is responsible for drainage between my property and my neighbor's?
Does La Porte require stormwater detention for residential projects?
Sources & Official References
Other rules in La Porte
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Erosion Control in Nearby Cities
How other cities in Harris County handle erosion control.