Topeka, KS Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Freeboard required
- 1 foot above base flood elevation
- Applies to
- New construction & substantial improvements
- Certification
- Licensed surveyor or engineer required
- Max fine
- $499 per day, misdemeanor
- Enforced by
- Topeka Floodplain Administrator
Summary
Topeka requires new construction and substantial improvements in mapped A, AE, and AH flood zones to elevate the lowest floor at least one foot above the base flood elevation, with mechanical equipment raised to the same level.
New construction or substantial improvement of any residential structures, including manufactured or mobile homes, shall have the lowest floor, including basement, elevated a minimum of one foot above base flood elevation. All mechanical and heating ventilation equipment to be elevated to same level of one foot above the base flood elevation. The elevation of the lowest floor shall be certified by a licensed land surveyor or professional engineer.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 20671, passed July 14, 2026).
Full Breakdown
Under TMC 17.30.190, residential structures, including manufactured and mobile homes, built or substantially improved in Shawnee County's mapped special flood hazard areas must have the lowest floor, including any basement, elevated at least one foot above the base flood elevation, with mechanical and HVAC equipment raised to the same level. Nonresidential structures get an alternative: floodproof to that same one-foot freeboard so walls are watertight and can resist hydrostatic and hydrodynamic loads. A licensed land surveyor or professional engineer must certify the lowest-floor elevation, and a registered engineer or architect must verify nonresidential floodproofing, with certification provided to the Floodplain Administrator.
Violations & Fines
Building without a floodplain permit, or below the required elevation, is a misdemeanor: up to a $499 fine plus costs, with each day of noncompliance a separate offense.
Frequently Asked Questions
Does Topeka require freeboard above the base flood elevation?
Can a nonresidential building floodproof instead of elevate?
Sources & Official References
Other rules in Topeka
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