Environmental Rules in Lenexa, KS (2026)
4 verified environmental rules for Lenexa, Kansas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
In the City of Lenexa, Kansas, new development and redevelopment cannot increase the quantity and rate of stormwater leaving a site without an approved stormwater management plan sealed by a Kansas professional engineer. No building permit issues until the Engineering and Construction Services Administrator approves it.
Lenexa, KS Stormwater Management Plan Requirements
Some RestrictionsLenexa City Code § 4-5-E-9
No development shall increase the quantity and rate of stormwater emanating from said land areas except in accordance with an approved stormwater management plan as provided in these regulations. The storm water management plan shall be prepared by a professional engineer licensed in the State of Kansas. No building permits shall be issued until and unless the stormwater management plan has bee...
Erosion Control
In the City of Lenexa, Kansas, no one can start land disturbance without a permit from the Community Development Director, and only jobs under 100 cubic yards of earth movement or 5,000 square feet of surface area are exempt. Article 4-1-N of the Unified Development Code adds slope, stabilization, sediment basin and inspection rules.
Lenexa, KS Erosion and Sediment Control Permit Rules
Some RestrictionsLenexa City Code § 4-1-N-4
A. No person may engage in any land disturbance activity, including the installation of sanitary sewers, without first obtaining a permit from the City, accordance with Section 4-1-N-5 and Section 4-1-N-6. ... ... C. Neither a permit nor an approved erosion and sediment control plan is required under this Article solely for: 1. any land disturbance activity that: a. involves less than 100 cubic...
Flood Zones
In the City of Lenexa, Kansas, any development or substantial improvement in a Special Flood Hazard Area or Zone X (Future Base Flood) needs a floodplain development permit. New residential lowest floors must sit at least one foot above base flood elevation, and floodway encroachments are prohibited without engineering proof of no rise in flood levels.
Lenexa KS Floodplain Development Permit and Flood Zone Rules
Significant RestrictionsLenexa City Code § 4-1-D-3
A development permit shall be obtained before construction or development begins within all SFHA's and Zone X (Future Base Flood) established in these provisions. No person shall initiate any development or substantial improvement or cause the same to be done without first obtaining a separate permit for each development as defined in this Section. ... Residential Construction: New construction...
Flood Elevation Requirements
In the City of Lenexa, Kansas, a new or substantially improved building in a Special Flood Hazard Area must put its lowest floor, basement included, and all mechanical equipment at least one foot above base flood elevation. Nonresidential buildings can floodproof to that same one-foot level instead, and a floodplain development permit comes first.
Lenexa, KS Flood Elevation and Freeboard Rules
Some RestrictionsLenexa City Code § 4-1-D-3-D-2
2. Specific Standards: In all SFHAs and Zone X (Future Base Flood) where base flood elevation data has been provided, the following provisions shall apply: a. Residential Construction: New construction or substantial improvement of any residential structure shall have the lowest floor, including basement, elevated a minimum of one (1) foot above base flood elevation. All mechanical, heating ven...
Looking for Johnson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Lenexa city rules.
Environmental Rules in Johnson County →