Sioux Falls, SD Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Sioux Falls, SD, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.
Key Facts
- Permit required
- Before any development in flood hazard area
- Permit expires
- If work not started within 1 year
- Floodway residential
- Residential development banned in regulatory floodway
- Enforcing office
- City floodplain administrator
- Governing chapter
- Code Chapter 156, Floodplain Management
Summary
Any development, filling, or grading inside a Sioux Falls special flood hazard area requires a floodplain development permit from the city's floodplain administrator before work begins, and new residential construction is banned in the regulatory floodway.
Required. Any person, owner, or authorized agent who intends to conduct any development (or change in water quality through spills, dumping, or inlets) in a special flood hazard area shall first make application to the floodplain administrator and shall obtain the required floodplain development permit prior to the start of development.
(b) Application for floodplain development permit. The applicant shall file an application in writing on a form furnished by the floodplain administrator. The application shall:
(1) Identify and describe the development to be covered by the permit;
(2) Describe the land on which the proposed development is to be conducted by legal description, street address, or similar description that will readily identify and definitely locate the site;
(3) Include a site plan showing the delineation of special flood hazard areas, floodway boundaries, flood zones, base flood elevations, ground elevations, proposed fill and excavation, and drainage patterns and facilities;
(4) Indicate the use and occupancy for which the proposed development is intended;
(5) Be accompanied by construction documents, grading and filling plans, and other information deemed appropriate by the floodplain administrator;
(6) State the valuation of the proposed work when required; and
(7) Be signed by the owner or the owner’s authorized agent.
(c) Validity of permit. The issuance of a floodplain development permit
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-135: Current through local ordinance 54-26, passed 7-14-2026).
Full Breakdown
Chapter 156 of the Sioux Falls Code requires anyone developing, filling, grading, or altering water quality in a special flood hazard area to apply to the floodplain administrator and obtain a floodplain development permit before starting work. Applications need a site plan showing floodway boundaries, base flood elevations, and drainage. Permits expire if work isn't started within one year, and the administrator can suspend or revoke a permit issued on incomplete or inaccurate information. Inside the mapped regulatory floodway, encroachments, fill, new construction, and substantial improvements, are flatly prohibited, and residential development is banned outright, with narrow exceptions for public infrastructure like bridges and utilities.
Violations & Fines
Building or filling in the special flood hazard area without a permit risks a stop-work order and permit revocation; new residential construction or fill inside the mapped floodway is prohibited outright, permit or not.
Frequently Asked Questions
Do I need a permit to build in a Sioux Falls flood zone?
Can I build a new house in the Sioux Falls floodway?
Sources & Official References
Other rules in Sioux Falls
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