Two permits, and the order matters
Philadelphia is one of the few places where a renovation can stall before anyone has looked at your construction drawings. The Department of Licenses and Inspections issues zoning permits and building permits separately, and depending on what you are doing — changing use, adding floor area, altering the footprint — the zoning approval has to come first.
Homeowners find this out the expensive way, usually after a contractor has already given them a start date. If your property is in a historic district or individually designated, add Historical Commission review on top. We establish which approvals a project actually needs before anyone quotes a schedule.
What is actually behind a rowhome wall
Most Philadelphia housing is attached, and attached houses behave differently. Party walls are shared and often unreinforced masonry, so opening a first floor is a structural question rather than a design one. Joists frequently run the short way and have been notched by decades of plumbers. Cast iron stacks reach the end of their life and cannot simply be tied into. Knob-and-tube wiring turns up behind plaster in houses that have been rewired twice.
None of this is unusual and none of it is a reason to panic. It is a reason to open up and look before signing a fixed price, which is how we scope city work.
Basement conversions
Adding a bathroom or living space to a Philadelphia basement is one of the most common requests we get, and one of the most misunderstood. A basement floor usually sits below the sewer line, so waste has to be pumped rather than fall by gravity — that means an ejector pit and pump, not just a connection. Ceiling height, egress and moisture control all have to be resolved before a basement counts as habitable space rather than a finished cellar.
We recently handled the design and permitting for a basement bathroom expansion in a West Philadelphia rowhome, working through exactly those constraints.
What we build in Philadelphia
- Kitchen remodeling
- Bathroom remodeling
- Basement remodeling and finishing
- Deck construction and design
- Flooring installation
- Whole-home renovation
- Home additions
Beyond the city
We work throughout the metro and Delaware County, including Chester, and north into Bucks County around Newtown.
Common questions
Do I need a zoning permit as well as a building permit?
Often, yes. Licenses and Inspections treats them as separate approvals, and work that changes use, footprint or floor area generally needs zoning approval first. We confirm which applies to your address before drawings are produced.
Can I put a full bathroom in my basement?
Usually, but it needs an ejector pump because the basement sits below the sewer line, and ceiling height, egress and moisture control have to be resolved for the space to be habitable.
Does a historic designation stop my renovation?
No, but it adds a review layer for exterior work on designated properties and in historic districts. Interior work is generally unaffected.
Start your Philadelphia project
Request a free consultation and we will confirm the approvals your project needs, scope what is behind the walls, and give you a written proposal.