Upper Darby, PA Zoning Overlays & Bonuses: Density Bonus Law (2026)

" The base C-3 height standard, set in the district's development table, is a minimum of two stories and a maximum of 85 feet, with the code cross-referencing that "up to 125 feet permitted with incentives provided in § 550-23G," confirming the 40-foot bonus stacks onto the 85-foot base. Table 5-2 assigns specific bonus amounts to specific features: preserving a historic structure or facade under the Secretary of the Interior's Standards earns 20 feet; a public plaza, square or courtyard of at least 250 square feet with 30% landscaping earns 10 feet; replacing existing nonconforming signage earns 10 feet; combining three qualifying streetscape amenities, such as bicycle racks, decorative lighting, a bus shelter or landscaped planters, earns 10 feet; structured parking within the building footprint, with at least half the spaces open to the public, earns 20 feet; a green roof covering 70% of net roof area earns 10 feet; alternative energy generating at least 15% of the building's annual energy use earns 10 feet; and a commitment to a LEED Silver or similar rating, documented within 90 days of the final certificate of occupancy, earns 20 feet.

Developers combine features up to the 40-foot ceiling; the incentives are reviewed through the same C-3 development approval process administered by the Zoning Officer and, where special exception uses are involved, the Zoning Hearing Board under §§ 550-53 and 550-54.