Little Elm, TX Environmental Rules: Grading & Drainage (2026)

Grading and drainage in Little Elm are regulated through the development standards in Chapter 106 of the zoning ordinance and the adopted building and engineering codes. Development projects must submit grading and drainage plans demonstrating that stormwater will be properly conveyed to approved drainage facilities without causing flooding or erosion on adjacent properties. Site grading must establish positive drainage away from building foundations with a minimum slope as required by the adopted International Residential Code, typically 6 inches of fall within the first 10 feet from the foundation. Altering natural drainage patterns in a manner that causes water to pond or flow onto neighboring properties is a code violation. Fill material placed on a lot must be properly compacted and graded to maintain drainage patterns consistent with the approved subdivision engineering plans. Retaining walls over 4 feet in height require engineered plans and a building permit. The town stormwater utility maintains public drainage infrastructure including channels, culverts, and detention facilities. Homeowners are responsible for maintaining positive drainage on their own lots and keeping drainage easements clear of obstructions including fences, structures, and landscape features that impede flow.