Oneida, NY Environmental Rules: Flood Elevation Requirements (2026)

Section 64-24 of Chapter 64, Flood Damage Prevention, sets the City of Oneida's elevation standard for residential structures on top of the general requirements in Sections 64-22 (subdivision proposals and encroachments) and 64-23 (anchoring, flood-resistant materials, and utility protection). Within Zones A1-A30, AE, and AH, and Zone A where base flood elevation data exist, new construction and substantial improvements must have the lowest floor, including any basement, elevated to or above the base flood level. Where Zone A has no elevation data, the lowest floor must instead sit at least three feet above the highest adjacent grade.

In Zone AO, the lowest floor must clear the highest adjacent grade by the depth number printed on the FIRM, or at least two feet if none is given, and adequate drainage paths must route floodwater around structures on slopes. Section 64-17 requires the permit holder to submit an as-built elevation certification, prepared and certified by a licensed land surveyor or professional engineer, once the lowest floor is placed; further work before that certification is filed proceeds at the permit holder's own risk, and the City Engineer can halt the project for deficiencies.

Section 64-20 makes it unlawful to occupy any building in a flood hazard area until the City Engineer issues a certificate of compliance, based on the required inspections and certified elevation data. Nonresidential structures face a parallel but distinct standard in Section 64-25, which allows floodproofing as an alternative to elevation.