North Richland Hills, TX Environmental Rules: Grading & Drainage (2026)

Grading and drainage in NRH are regulated through the Subdivision Regulations, Building Code (adopted from the International Residential Code and International Building Code), and Chapter 102 floodplain ordinance. Any project moving more than 50 cubic yards of earth, or any grading within a drainage easement, flood zone, or within 20 feet of a property line requires a grading permit from Public Works. New construction must provide positive drainage with a minimum 5 percent slope for 10 feet from foundation walls, or equivalent engineered drainage. Downspouts and sump pump discharges must terminate at least 5 feet from property lines and cannot be directed at neighboring buildings or into neighbor yards. Texas common law of surface waters generally follows the reasonable use rule, meaning property owners cannot unreasonably increase runoff onto neighbors. Filling or obstructing drainage swales and easements is prohibited. Retaining walls over 4 feet require engineered plans. Sheet flow across lots must be preserved unless redirected through engineered systems. Post-construction drainage inspections verify compliance before final occupancy. Repeated drainage complaints may trigger enforcement and required remediation.