Philadelphia County, Pennsylvania requires a building permit for new construction and many additions, alterations, demolitions, occupancy changes and major repairs, issued by the city's Department of Licenses and Inspections (L&I).1 L&I also issues zoning permits under the Philadelphia Zoning Code, which applies throughout the county.2 Septic permits are separate: where City sewer is unavailable, the Department of Public Health handles them.34
At a glance
- Building permit
- Required for new construction and many additions, alterations, demolitions, occupancy changes and major repairs5
- Zoning
- Yes; the Philadelphia Zoning Code applies citywide, with standards that vary by district and overlay67
- Septic permits
- Required through the Department of Public Health where City sewer is unavailable34
- Owner-builder
- Resident owners of a one- or two-family home may do emergency repairs without a contractor, but not plumbing, electrical or fire-suppression work; a legalization permit is due within 3 business days8
- Inspections
- Construction and repair projects are inspected for safety; the permit identifies required inspections910
- Certificate of occupancy
- Required for specified projects and changes of use, but generally not for an existing one- or two-family home with unchanged use1112
- Floodplain development
- Flood protection documents must accompany zoning and building applications in a Special Flood Hazard Area or floodplain13
Who to call
Building permits
City of Philadelphia Department of Licenses and Inspections (L&I)
Building, repair, demolition and zoning permits, plus code enforcement and licensing, for all of Philadelphia County
1401 John F. Kennedy Blvd., 11th Floor, Philadelphia, PA 19102
Zoning
City of Philadelphia Department of Licenses and Inspections (L&I) - Zoning Permits and Approvals
Zoning permits and approvals under the Philadelphia Zoning Code for all of Philadelphia County
1401 John F. Kennedy Blvd., 11th Floor, Philadelphia, PA 19102
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Philadelphia County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Philadelphia County, Pennsylvania?
Yes. Philadelphia County requires a building permit for new buildings and many enlargements, additions, alterations, demolitions, occupancy changes, major repairs and projects disturbing at least 5,000 square feet of earth1. Regular maintenance and specified minor work may be exempt when the property is not on the Philadelphia Historic Registry, but most projects need a zoning permit before the building-permit application1. Beginning July 1, 2026, Philadelphia uses the 2021 family of International Code Council codes with local amendments14. Properties in a Special Flood Hazard Area or floodplain must submit flood protection forms with every zoning or building permit application13.
Who is the Philadelphia County building department, and how do you reach it?
The Philadelphia Department of Licenses and Inspections is the building department for Philadelphia County and also handles zoning, licensing and code enforcement15. Reach L&I through 311 or at (215) 686-8686, or visit 1401 John F. Kennedy Blvd., 11th Floor, Philadelphia, PA 1910215. Building-permit applications may be filed online through eCLIPSE or in person by appointment at the Permit and License Center1. Depending on the project, L&I may require pre-approvals from the Water Department, Department of Public Health, Planning Commission, Fire Department, Historical Commission, Streets Department, or Parks and Recreation1. Construction and repair work must receive the inspections identified on the permit, and successful completion leads to a Certificate of Approval109. Certificate-of-occupancy paperwork carries a $100 filing fee and a $253 permit fee per building or space that needs its own certificate, plus surcharges.16
Does Philadelphia County have zoning?
Yes. Philadelphia County and the City of Philadelphia are coterminous, and the Philadelphia Zoning Code regulates development and changes of use throughout the city176. L&I issues zoning and change-of-use approvals under that code18. Start with the parcel's base district and overlays, because allowed uses, height, bulk and setbacks are not one countywide standard71920. In the RM-1 through RM-4 residential districts the minimum lot area runs from 1,440 square feet in RM-1 to 15,000 square feet in RM-2, 10,000 in RM-3 and 2,500 in RM-4; the RMX-1 and RMX-2 districts have minimum district areas of 2 acres and 1 acre.2122 The published quick guide is a general aid rather than a substitute for the adopted code7. We could not confirm a single countywide minimum dwelling size, countywide minimum lot size, lot-coverage rule or accessory-dwelling answer; ask L&I about the exact parcel and proposal23.
How do septic permits work in Philadelphia County?
Most of Philadelphia is served by municipal sewer, but some areas do not have City sewer lines2425. A property owner without City sewer access must request a permit to install or repair a septic system and must coordinate the work with the Philadelphia Department of Public Health326. The septic permit costs $500 per location3. Where public infrastructure is available, Philadelphia Water Department permits are required to install or repair a water service or sewer lateral between its infrastructure and the property27. The soil survey estimates that 68.8% of county soils do not have severe limitations for a conventional drain field, but that countywide measure does not replace site evaluation or Public Health approval284.
Can you live in an RV or tiny home on your land in Philadelphia County?
We could not confirm a Philadelphia rule that generally allows residential occupancy of an RV or tiny home on a private lot. The Philadelphia Zoning Code regulates development and changes of use countywide, while permitted uses and dimensional standards depend on the parcel's district and overlays297. Ask L&I whether the proposed structure or vehicle, residential use, duration and utility plan are allowed before buying or placing it on the property23. A manufactured home built to federal standards receives limited treatment under Pennsylvania's construction code, but relocation, additions, later alterations, utility work and grading can trigger construction-code requirements30. That construction rule does not establish that Philadelphia zoning permits the home on a particular lot3018.
Building a home in Philadelphia County: the steps, in order
- Identify the parcel's zoning district and overlays, then confirm the proposed use and dimensional standards with L&I723.
- Determine whether zoning approval, flood protection forms or agency pre-approvals are required before filing the building application131.
- Apply online through eCLIPSE or in person by appointment at the Permit and License Center1.
- Use licensed contractors for plumbing, electrical and fire-suppression work; the owner-occupant exception covers only emergency repairs to a one- or two-family home, which must be reported and legalized by permit within 3 business days8.
- Schedule every inspection identified on the permit and obtain the Certificate of Approval after successful completion10.
- Confirm whether the project requires a certificate of occupancy; an existing one- or two-family home with unchanged use generally does not12.
- Arrange the applicable public water and sewer connection permits, or obtain Public Health approval for septic work where City sewer is unavailable273.
What should you check before buying land in Philadelphia County?
Check the parcel's base district, overlays and permitted use before estimating buildable area, because Philadelphia's height, bulk and setback standards vary by zoning district71920. Compare the intended occupancy and existing structures with City records, since a change of occupancy can require a building permit and certificate of occupancy3211. Determine whether the parcel is in a Special Flood Hazard Area, where flood protection documents must accompany permit applications13. Confirm sewer availability and do not assume an on-lot system is possible without a Department of Public Health permit253. If access affects state highway land or a PennDOT drainage facility, obtain a PennDOT Highway Occupancy Permit33.
Watch-outs
- A building-permit exception does not waive zoning, floodplain or separate trade approvals; ask L&I for the complete approval path before work starts11315.
- A certificate of occupancy applies to specified projects and occupancy changes, but is generally unnecessary for an existing one- or two-family home when the use remains the same1112.
- We could not confirm parcel-level rules for RV occupancy, tiny homes, minimum dwelling size or private wells; ask L&I about land use and the Department of Public Health about an alternative water or sewage proposal234.
Sources
- Get a Building Permit, quoted and re-checked
- Zoning permits, quoted and re-checked
- Request a permit for a septic system or private sewer line | Services | City of Philadelphia, quoted and re-checked
- Request a permit for a septic system or private sewer line | Services | City of Philadelphia, quoted and re-checked
- Get a Building Permit, quoted and re-checked
- Zoning permits, quoted and re-checked
- Philadelphia Zoning Code Quick Guide, quoted and re-checked
- Construction and repair permits | Department of Licenses and Inspections | City of Philadelphia, quoted and re-checked
- Construction inspections, quoted and re-checked
- Request an L&I inspection | Services | City of Philadelphia, quoted and re-checked
- Get a Certificate of Occupancy | Services | City of Philadelphia, quoted and re-checked
- Get a Certificate of Occupancy, quoted and re-checked
- Flood protection forms, quoted and re-checked
- Applicable codes, quoted and re-checked
- City of Philadelphia Department of Licenses and Inspections (L&I) (phila.gov)
- Get a Certificate of Occupancy, quoted and re-checked
- Zoning permits (2026 county census)
- Zoning permits, quoted and re-checked
- ZONING QUICK GUIDE, quoted and re-checked
- ZONING QUICK GUIDE, quoted and re-checked
- City building codes, quoted and re-checked
- Philadelphia Zoning Code Base Districts Quick Guide, February 2026, quoted and re-checked
- City of Philadelphia Department of Licenses and Inspections (L&I) - Zoning Permits and Approvals (phila.gov)
- Request a permit for a septic system or private sewer line | Services | City of Philadelphia (2026 county census)
- Request a permit for a septic system or private sewer line | Services | City of Philadelphia, quoted and re-checked
- Request a permit for a septic system or private sewer line, quoted and re-checked
- Water & Sewer Permits – Development Services, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Zoning permits, quoted and re-checked
- Pennsylvania Uniform Construction Code, Chapter 403 (Pennsylvania statewide rule), quoted and re-checked
- Get approval for construction in the floodplain | Services | City of Philadelphia, quoted and re-checked
- Get a Building Permit | Services | City of Philadelphia, quoted and re-checked
- Apply for a PennDOT Highway Occupancy Permit (Pennsylvania statewide rule), quoted and re-checked
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.