Ogden, UT Environmental Rules: Flood Zones (2026)

Section 15-26-3 makes Ogden's floodplain regulations mandatory and supplemental: subsection B states flatly that no structure shall be constructed, located, extended, converted, or altered and no land shall be developed, occupied or modified without full compliance with the terms of this chapter and other applicable regulations. The rules apply on top of, not instead of, the zoning standards of the underlying district, and the more restrictive requirement controls if the two conflict. The floodplain boundaries come from FEMA's Flood Insurance Study for Ogden City, Utah, dated November 30, 2023, along with the accompanying Flood Insurance Rate Maps and Flood Boundary Floodway Maps, all adopted by reference and kept on file with the city engineer for public inspection under Section 15-26-2.

Before any subdivision plat, building permit or site development permit is issued for land in an area of shallow flooding or special flood hazard, Section 15-26-6 requires the applicant to file for a subdivision, conditional use or building/site development permit and disclose whether the property lies in a mapped flood hazard area; if it does, the application must include scaled plans, elevations, a description of proposed structures and fill, and floodproofing certification from a registered engineer or architect. Appeals and variance requests go to the Board of Building and Fire Code Appeals under Section 15-26-10, which can attach conditions to any variance it grants and must report every variance issued to FEMA and the state coordinating agency.