ADU Permit Submission Checklist in Philadelphia, Pennsylvania
Everything you need to apply for a adu permit in Philadelphia, Pennsylvania — documents, fees, steps, and a downloadable submission packet.
Key Facts
- Permit required
- Yes
- Submission method
- Online
- Typical fee range
- $3,000 – $10,725
- Review time
- Varies by jurisdiction
- Inspections
- 6 inspections required
ADU Permit Checklist
Philadelphia — 7 required, 0 optional
Forms & Applications(1)
Plans & Diagrams(5)
Supporting Documents(1)
This checklist is for reference only. Requirements may change — always verify with Philadelphia before submission.
Avoid rejections — generate a submission-ready packet
Get a personalized ADU permit packet for Philadelphia, Pennsylvania — tailored to your project details.
- Required forms: Building Permit Application, and more
- Pre-filled templates: Permit Cover Sheet
- Fee breakdown: $1,000–$6,500 estimated total
- Step-by-step City of Philadelphia Department of Licenses and Inspections portal submission guide
- Inspection prep checklist (6 items)
- Personalized for your specific project details
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Required Documents
Philadelphia requires the following documents for this permit application.
Building Permit Application
Completed City of Philadelphia building permit application with complete project description, property owner contact information, and estimated construction cost
Architectural Drawings
Complete architectural plans signed by a licensed Pennsylvania architect, including floor plans, elevations, sections, and construction details with compliance notes
Site Plan
Site plan showing property boundaries, dimensions, building footprint, setbacks, parking layout, access routes, and existing utilities
Zoning Verification Letter
Zoning verification letter from Philadelphia Planning Department confirming property zoning district and ADU eligibility under current zoning ordinance
Structural Engineering Plans
Structural engineering plans and calculations by a licensed Pennsylvania professional engineer for foundation, framing, and load-bearing elements
Mechanical and Utility Plans
Plans showing water supply, sewer, electrical, gas connections and separate metering for water, electric, and gas services to ADU
Proof of Property Ownership
Current property deed or title commitment showing applicant ownership of subject property
Permit Process
Follow these steps to submit your permit application through City of Philadelphia Department of Licenses and Inspections.
- 1
Zoning Eligibility Verification
Obtain zoning verification letter from Philadelphia Planning Department confirming ADU is allowed in property zoning district and meets dimensional requirements
You'll need: Zoning Verification Letter, Proof of Property Ownership
- 2
Submit Building Permit Application
Submit complete permit application with architectural, structural, utility plans and all required supporting documentation to Philadelphia Licenses and Inspections
You'll need: Building Permit Application, Architectural Drawings, Site Plan, Structural Engineering Plans, Mechanical and Utility Plans
- 3
Plan Review and Approval
Philadelphia Licenses and Inspections conducts comprehensive plan review for compliance with zoning ordinance, Pennsylvania Building Code, and design standards
- 4
Address Plan Review Comments
Revise and resubmit plans as needed to address any code compliance issues or comments raised during plan review
- 5
Permit Issuance and Payment
Pay all permit fees and receive approved building permit authorizing construction to begin
- 6
Construction Inspections
Schedule and pass required inspections: foundation, framing, electrical, plumbing, mechanical, and final inspection per Pennsylvania Building Code
- 7
Certificate of Occupancy
Receive Certificate of Occupancy from Philadelphia Building Official upon successful final inspection and code compliance verification
Fees and Timeline
Fee Breakdown
| Fee | Range | Confidence |
|---|---|---|
| ADU Permit Fee | $2,000 – $6,500 | Verified |
| Plan Review Fee | $1,000 – $4,225 | Verified |
Inspections Required
Foundation and footing inspection per Pennsylvania Building
Foundation and footing inspection per Pennsylvania Building Code
Framing and structural member verification
Framing and structural member verification
Electrical rough-in and separate service panel inspection
Electrical rough-in and separate service panel inspection
Plumbing rough-in and fixture installation inspection
Plumbing rough-in and fixture installation inspection
Mechanical systems and HVAC installation inspection
Mechanical systems and HVAC installation inspection
Final inspection and Certificate of Occupancy
Final inspection and Certificate of Occupancy
Authority Sources
Data on this page is sourced from official records published by the permitting authority. Always verify requirements directly before submitting.
City of Philadelphia Department of Licenses and Inspections
Last verified: February 15, 2026
2 sources referenced
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Frequently Asked Questions
- Do I need a adu permit in Philadelphia?
- Yes. Philadelphia requires a adu permit for this type of project. Submitting without a permit may result in fines, required removal, or complications when selling your property.
- How long does adu permit approval take in Philadelphia?
- Processing times in Philadelphia vary depending on project complexity and current review volume. The process involves 7 steps. Contact Philadelphia Development Services for current timelines.
- What documents are required for a adu permit in Philadelphia?
- Philadelphia requires 7 documents including Building Permit Application, Architectural Drawings, Site Plan, Zoning Verification Letter, and others. See the full list above for details.
- What happens if I build without a adu permit in Philadelphia?
- Building without a permit in Philadelphia can result in stop-work orders, fines, required removal of work, difficulty selling your property, and insurance complications. It is strongly recommended to obtain proper permits before starting work.
- Can PermitMagic help prepare my adu permit submission in Philadelphia?
- Yes. PermitMagic generates a submission-ready packet tailored to Philadelphia's requirements, including a document checklist, workflow steps, and authority references. Start a permit plan to get your personalized packet.
- How much does a adu permit cost in Philadelphia?
- ADU permit fees in Philadelphia typically range from $3,000 to $10,725, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with Philadelphia.
Related Permits
Other permits in Philadelphia
ADU permits in nearby cities
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