Florissant, MO Building Setbacks & Zoning: Structure Height Limits (2026)

085(E) sets the height, area and bulk regulations for the "R-1" Single-Family Dwelling District, the city's base single-family zone. The table caps buildings at two and one-half stories and thirty-five feet in height, alongside a one-acre minimum lot area, a 30-foot minimum front yard depth, a 35-foot minimum rear yard depth and a 15-foot minimum side yard width. Lots must also carry a minimum frontage of 120 feet and a minimum depth of 150 feet, with reduced 40-foot frontage and 60-foot width allowed for lots abutting a cul-de-sac turnaround.

110, so a duplex or multi-family lot is not governed by the R-1 numbers. A property owner who wants to build above the table's limits needs either a variance or, where the Code allows it, a special use permit reviewed at a public hearing; appeals of a Building Commissioner or Planning and Zoning Commission decision go to the Board of Adjustment under the Zoning Code's Article VIII hearing procedures. Height is measured as part of the same subsection that fixes lot area and yard depths, so a house that meets the 35-foot cap but crowds a required yard is still out of compliance and can be held up at the building permit stage.