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 5 steps. Contact Philadelphia Development Services for current timelines.

What documents are required for a adu permit in Philadelphia?

Philadelphia requires 6 documents including Permit Application, Site Plan, Architectural Plans, Structural Calculations, 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 $80 to $700, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with Philadelphia.

ADU Permit Submission Checklist in Philadelphia, Pennsylvania

Understand the requirements, gather the right documents, and generate a submission-ready packet for your adu permit in Philadelphia, Pennsylvania.

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Key Facts

Permit required: Yes
Submission method: Online
Typical fee range: $80 – $700
Review time: Varies — contact authority
Inspections: 6 inspections required

Needs verificationLast verified: Feb 15, 20261 verified source

Limited Data Available

Some information on this page has not been fully verified. We're working to improve data quality. Always verify with Philadelphia directly.

ADU Permit Checklist

Philadelphia — 6 required, 0 optional

Forms & Applications(1)

Permit ApplicationREQUIRED✓[1][2]
Completed building permit application form

Plans & Diagrams(3)

Site PlanREQUIRED✓[3][4]
Plan showing existing structures, proposed ADU, and setbacks
Architectural PlansREQUIRED✓[5][6]
Floor plans, elevations, and sections of the proposed ADU
Utility Connection PlanREQUIRED✓[9][10]
Plan showing water, sewer, and electrical connections

Supporting Documents(2)

Structural CalculationsREQUIRED✓[7][8]
Engineering calculations for foundation and framing
Energy ComplianceREQUIRED✓[11][12]
Energy compliance documentation per state energy code

This checklist is for reference only. Requirements may change — always verify with Philadelphia before submission.

Avoid rejections — generate a submission-ready packet

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Required forms: Permit Application, and more
Pre-filled templates: Permit Cover Sheet
Fee breakdown: $80–$700 estimated total
Step-by-step Philadelphia L&I Permits 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.

Permit Application

Completed building permit application form

Site Plan

Plan showing existing structures, proposed ADU, and setbacks

Architectural Plans

Floor plans, elevations, and sections of the proposed ADU

Structural Calculations

Engineering calculations for foundation and framing

Utility Connection Plan

Plan showing water, sewer, and electrical connections

Energy Compliance

Energy compliance documentation per state energy code

Permit Process

Follow these steps to submit your permit application through Philadelphia L&I Permits.

1
Create Account
Register on the Philadelphia L&I Permits portal.
You'll need: Email address
2
Start Application
Log in and select the ADU permit application.
You'll need: Login credentials
3
Enter Project Details
Fill in project address, owner information, and system details.
You'll need: Project address, Owner contact, Contractor license
4
Upload Documents
Upload all required documents per the checklist.
You'll need: All required documents in PDF format
5
Pay Fees and Submit
Pay applicable fees and submit the application.
You'll need: Payment method

Fees and Timeline

Fee Breakdown

Fee	Range	Confidence
Building/Electrical Permit Fee	$160 – $700	Estimated
Plan Review Fee	$80 – $455	Approximate

Fees are estimates and may change. Verify current fees with Philadelphia.

Inspections Required

Foundation Inspection

Verify foundation per approved structural plans

Framing Inspection

Verify wall, floor, and roof framing

Electrical Rough-In

Verify wiring, panel, and circuit layout

Plumbing Rough-In

Verify supply and drain installation

Insulation

Verify insulation installation per energy code

Final Inspection

Complete inspection of finished ADU

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

1 source referenced

Official page

Philadelphia ADU Permit Information

Verified February 15, 2026

Fee schedule

Philadelphia Fee Schedule

Verified February 15, 2026

Portal guide

Philadelphia Online Permitting Portal

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 5 steps. Contact Philadelphia Development Services for current timelines.
What documents are required for a adu permit in Philadelphia?: Philadelphia requires 6 documents including Permit Application, Site Plan, Architectural Plans, Structural Calculations, 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 $80 to $700, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with Philadelphia.

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