Bethlehem, PA Building Setbacks & Zoning: Structure Height Limits (2026)

The Bethlehem Zoning Ordinance sets a maximum structure height for each zoning district as part of the district's bulk schedule. The City's lower-density residential districts (RT, RR, RS) cap principal-building height at modest residential limits typical of PA Third Class cities, while higher-density RG, RM, the Central Business (CB) district and the CM Industrial Redevelopment district (which governs the former Bethlehem Steel / SteelStacks site) allow taller buildings consistent with Bethlehem's downtown skyline and the historic blast-furnace silhouette. The Pennsylvania Uniform Construction Code (34 Pa. Code §§401-405) adopts the International Building Code, which adds building-height and area limits based on construction type (Type I through Type V) and occupancy classification on top of the zoning cap - the more restrictive of the two controls. Special structures such as cell towers, water tanks, church spires and mechanical penthouses are typically excluded from the height calculation or addressed under specific conditional-use provisions. Height variances require Zoning Hearing Board approval under the MPC at 53 P.S. §10910.2, with the applicant proving unnecessary hardship. The City's Floodplain Overlay - significant along the Lehigh River and Monocacy Creek - and any Hillside / Steep Slope provisions may further restrict building height and footprint in environmentally sensitive areas.