Environmental Rules in Rowlett, TX (2026)
4 verified environmental rules for Rowlett, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Rowlett requires storm sewer inlets sized to keep 100-year design-storm flows under 1.5 inches over residential street curbs, capping street flow at 45 cubic feet per second under the Development Code's drainage engineering standards.
Rowlett Stormwater Drainage Design Standards
Some RestrictionsRowlett Code of Ordinances § 77-502(C)(2)(a)
Storm sewer inlets shall be provided along paved streets at such intervals as are necessary to limit the depth of flow as follows: (a) Residential streets. Based on parkway slopes of one-fourth of an inch per foot behind the curb, the 100-year design frequency flows shall not exceed a depth of one and one-half inches over the top of the curb. A maximum flow of 45 cfs will be allowed in the street.
Erosion Control
Any Rowlett property owner proposing new development must submit an erosion control plan covering excess siltation and downstream erosion, approved by the city engineer, under Code § 77-502(D)(4). Excavation, fill and grading work also needs its own city engineer permit before work starts.
Rowlett Development Erosion Control Plan
Some RestrictionsRowlett Code of Ordinances § 77-502(D)(4), (D)(9); § 77-502(C)(8)
4.When a property owner proposes a development, provisions shall be made in the development plan for control of excess siltation and downstream erosion. An erosion control plan shall be approved by the city engineer...8.Excavation, fill, and grading operations within the city limits shall be undertaken only after a proper permit has been obtained from the city engineer. Failure to obtain the pr...
Flood Zones
Rowlett requires a floodplain development permit before any construction, land alteration, or use change inside its areas of special flood hazard, which cover the city's jurisdiction, territorial limits and extraterritorial jurisdiction in both Dallas and Rockwall counties. The city engineer, acting as floodplain administrator, reviews and approves every application, and violators face misdemeanor fines.
Rowlett Floodplain Development Permit Required
Significant RestrictionsRowlett Code of Ordinances § 82-38; § 82-45; § 82-53
Sec. 82-38. - Establishment of development permit. A floodplain development permit shall be required to ensure conformance with the provisions of this article. (Ord. No. 023-08, § 1, 9-2-2008) Sec. 82-45. - Permit procedures. (a) Application for a floodplain development permit shall be presented to the floodplain administrator on forms furnished by him/her and may include, but not be limited to...
Flood Elevation Requirements
Rowlett requires new and substantially improved residential structures in mapped flood hazard areas to elevate the lowest floor, including any basement, two feet above the base flood elevation. Nonresidential buildings must meet the same two-foot freeboard or be engineered watertight below that level, with a licensed professional certifying compliance to the floodplain administrator.
Rowlett Two-Foot Freeboard Elevation Rule
Significant RestrictionsRowlett Code of Ordinances § 82-48
Sec. 82-48. - Specific standards. In all areas of special flood hazards where base flood elevation data has been provided ... the following provisions are required: (1) Residential construction. New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated to two feet above the base flood elevation. A registered professional...
Looking for Dallas County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Rowlett city rules.
Environmental Rules in Dallas County →