Environmental Rules in Kirkwood, MO (2026)
4 verified environmental rules for Kirkwood, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Kirkwood makes larger infill projects capture their own runoff before it leaves the lot. Section 5-202 requires a stormwater permit for any project adding 1,000 square feet or more of impervious area, or pushing total lot coverage to 25 percent or higher, and both trigger the same numeric treatment standard.
Kirkwood Infill Development Stormwater Rules
Some RestrictionsKirkwood Code of Ordinances § 5-201, § 5-202(a)(1)
REGULATED INFILL DEVELOPMENT The creation of net additional impervious area of at least 1,000 square feet or causing the total impervious area on the lot to be 25% or greater of the total lot area for commercial, industrial, or residential real property through new development, redevelopment, or rehabilitation of existing lots. ... (a) All regulated infill development shall not proceed without ...
Erosion Control
Kirkwood requires a grading permit from the Director of Public Services before any land disturbance, and the city's grading code makes erosion and sediment control mandatory, not optional, once dirt starts moving. Contractors must keep interim siltation devices working at full design capacity until ground cover is established, and sites disturbing five acres or more also need a separate state land disturbance permit from the Missouri Department of Natural Resources.
Kirkwood Grading Erosion and Sediment Control
Some RestrictionsKirkwood Code of Ordinances § 20-214
(d) Grading shall be performed in such a manner as not to cause or allow sediment on adjacent property, public property (including street pavements and sidewalks), or to cause or allow pollution of a watercourse. ... (f) During grading operations and until ground cover is established, interim siltation and erosion control in the devices or procedures shall be required and shall be maintained to...
Flood Zones
Kirkwood requires a floodplain development permit for any construction inside its mapped special flood hazard areas before a shovel goes in the ground. Sections 5-70 and 5-71 name the Building Commissioner as Floodplain Administrator and bar any development, alteration or manufactured-home placement in a numbered or unnumbered A or AE zone without one.
Kirkwood Floodplain Development Permit
Significant RestrictionsKirkwood Code of Ordinances § 5-71(A)
A. Floodplain development permit (required). A floodplain development permit shall be required for all proposed construction or other development, including the placement of manufactured homes, in the areas described in § 5-70(A). No person, firm, corporation, or unit of government shall initiate any development or substantial improvement or cause the same to be done without first obtaining a s...
Flood Elevation Requirements
New and substantially improved buildings inside Kirkwood's mapped flood zones must sit above the base flood elevation, not just at it. Section 5-72(B)(1) requires the lowest floor, including any basement, of a residential structure to be elevated a full foot above base flood elevation, with nonresidential buildings allowed to floodproof instead.
Kirkwood Base Flood Elevation Freeboard Rule
Some RestrictionsKirkwood Code of Ordinances § 5-72(B)(1)(a)-(b)
1. In all areas identified as numbered and unnumbered A zones and AE zones where base flood elevation data have been provided as set forth in Subsection A.2 of this section, the following provisions are required: a. Residential construction. New construction or substantial improvement of any residential structures, including manufactured homes, shall have the lowest floor, including basement, e...
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