Philadelphia does not provide a universal ADU exemption; an accessory unit is evaluated as a use, zoning, building, and trade project for the address. The city's current Landlord Gateway also points owners to Permit Navigator for renovation permit and license planning.
Philadelphia offers a no-plans EZ permit for qualifying residential decks up to 216 square feet, while an on-grade patio and a deck no more than 12 inches above grade can be exempt from zoning review.
Philadelphia generally requires a Building Permit for non-masonry fences over six feet or masonry fences over two feet. Zoning limits and property-specific exceptions must be checked separately.
Philadelphia classifies HVAC, ductwork, appliances, and related equipment under the mechanical/fuel-gas trade permit path when the work is limited to that trade.
Philadelphia allows an EZ permit for qualifying nonstructural interior alterations in a single-family residence; structural, occupancy, egress or broader work requires plans and related permits.
A one- or two-family dwelling usually does not need a building permit for non-fire-rated window or door replacement in the same opening without structural change, unless the property is historic.