Flood Zones: Florissant vs Kirkwood
How do flood zones rules compare between Florissant, MO and Kirkwood, MO?
Florissant and Kirkwood have similar restriction levels.
Florissant, MO
St. Louis County
Florissant has floodplain areas subject to FEMA Flood Insurance Rate Maps (FIRMs) administered by SEMA. Land disturbance permits are required for significant activities in or near flood zones. The city adopted the 2021 IRC with Appendix AJ (existing buildings) and other flood-relevant appendices.
View full Florissant rules →Kirkwood, MO
St. Louis County
Kirkwood's Floodway/Floodplain Management ordinance (Chapter 5, Article VI; Ord. No. 10241, adopted Dec. 18, 2014) requires a floodplain development permit for all development in FEMA-designated A and AE zones shown on the St. Louis County FIRMs effective February 4, 2015.
View full Kirkwood rules →Key Facts Comparison
| Fact | Florissant | Kirkwood |
|---|---|---|
| FEMA Maps | DFIRMs via SEMA | - |
| Land Disturbance | Major permit for ≥1 acre projects | - |
| Fence in Floodplain | Restricted or prohibited — check permit guide | - |
| IRC Appendices | 2021 IRC with flood-relevant appendices adopted | - |
| - | - |
Highlighted rows indicate differences between cities.
Florissant FAQ
Is my property in a flood zone in Florissant?
Florissant has floodplain areas subject to FEMA Flood Insurance Rate Maps (FIRMs) administered by SEMA. Land disturbance permits are required for significant activities in or near flood zones. The city adopted the 2021 IRC with Appendix AJ (existing buildings) and other flood-relevant appendices.
Do I need flood insurance in Florissant?
FEMA Maps: DFIRMs via SEMA. Land Disturbance: Major permit for ≥1 acre projects. Fence in Floodplain: Restricted or prohibited — check permit guide. IRC Appendices: 2021 IRC with flood-relevant appendices adopted.
Kirkwood FAQ
Is my Kirkwood property in a flood zone?
Check the FEMA Flood Map Service Center using your address, or contact Kirkwood Planning. Properties in numbered/unnumbered A zones or AE zones on the St. Louis County FIRMs are regulated.
Do I need a permit to build in a Kirkwood floodplain?
Yes. A floodplain development permit is required for all proposed construction or development, including manufactured home placement, in regulated zones.
When did Kirkwood adopt its current floodplain ordinance?
Ordinance No. 10241 was adopted December 18, 2014, with FIRM panels effective February 4, 2015.
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