How much does a building permit cost in Trenton, NJ?

The minimum permit fee is Contact Department of Inspections for current fee schedule. Fees are calculated as: Based on project type, scope, construction value, and square or cubic footage.. Plan check fee: Calculated as percentage of permit fee.

How do I apply for a building permit in Trenton, NJ?

1. Contact the Project Application Review Committee (PARC) for Planning and Zoning requirements and approvals. 2. Prepare two sets of sealed plans (three sets for restaurants) completed by a New Jersey-licensed architect or engineer. 3. Submit plans to the Department of Inspections, 2nd Floor, City Hall. 4. Plan review is completed within 20 working days from the time the construction inspector accepts the plans. 5. Single trade permits are issued within 48 hours of acceptance. 6. Pay all required permit, plan review, and application fees. 7. Proceed with construction and schedule inspections as work progresses.

How long does it take to get a building permit in Trenton, NJ?

Typical processing time is 20 working days for plan review; 48 hours for single trade permits..

What work is exempt from building permits in Trenton, NJ?

The following work is generally exempt: Exterior painting of residential properties (exterior painting in historic districts requires a historical permit). Note: Many other work types require permits, including additions, alterations, decks, demolition, fences, roofing, siding, and more. Confirm your specific project with the Department of Inspections.

How do I schedule a building inspection in Trenton, NJ?

Inspections can be scheduled via: Department of Inspections, 2nd Floor, City Hall, Building: (609) 989-3571; Electrical: (609) 989-3587; Plumbing: (609) 989-3546; Fire: (609) 989-3555. Requests must be submitted at least 48 hours prior to desired inspection time..

City Building Permits

Trenton, NJ - 2026 Building Permit Guide

How to apply for a building permit in Trenton, New Jersey. Permit authority, application steps, fees, and inspection requirements.

New Jersey Mercer County Updated March 2026

Permit Authority

All construction activities within the City of Trenton, enforcing the New Jersey Uniform Construction Code and Uniform Fire Code.

Department: Division of Technical Services, Department of Inspections
Address: 319 East State Street, 2nd Floor, Trenton, NJ 08608
Phone: (609) 989-3550
Website: https://www.trentonnj.org/239/Division-of-Technical-Services

Online Permit Portal

Open Trenton City Website

Platform: City Portal & In-Person • Account required: No • Submission: Online only

Additional resources:

Application Process

Contact the Project Application Review Committee (PARC) for Planning and Zoning requirements and approvals.
Prepare two sets of sealed plans (three sets for restaurants) completed by a New Jersey-licensed architect or engineer.
Submit plans to the Department of Inspections, 2nd Floor, City Hall.
Plan review is completed within 20 working days from the time the construction inspector accepts the plans.
Single trade permits are issued within 48 hours of acceptance.
Pay all required permit, plan review, and application fees.
Proceed with construction and schedule inspections as work progresses.

Typical processing time: 20 working days for plan review; 48 hours for single trade permits.

Source: Division of Technical Services, Department of Inspections

General Requirements

All construction, alteration, repair, demolition, or change in occupancy requires a permit and compliance with the New Jersey Uniform Construction Code and Uniform Fire Code.

Required Documents

Two sets of sealed plans (three sets for restaurants) signed by NJ-licensed architect or engineer
Construction Permit Application
Applicable subcode technical sections (Building, Electrical, Plumbing, Fire Protection, Mechanical, Elevator)
Proof of contractor registration with New Jersey Division of Consumer Affairs
Zoning approval documentation if required

Permit validity: 12 months from the date of the last inspection per New Jersey Uniform Construction Code.
Building code: New Jersey Uniform Construction Code (NJ UCC) and Uniform Fire Code
Owner-builder: All plans must be prepared and sealed by a New Jersey-licensed architect or engineer; owner-builders may not prepare their own plans.
Contractor requirements: All contractors must be registered with the New Jersey Division of Consumer Affairs. Zoning approval may be required before UCC permit issuance.

Fees

Minimum permit fee: Contact Department of Inspections for current fee schedule
Plan check fee: Calculated as percentage of permit fee
Permit fee formula: Based on project type, scope, construction value, and square or cubic footage.
Trade permit fee: Separate fees for each subcode (Building, Electrical, Plumbing, Fire Protection, Mechanical, Elevator)
Payment note: Consult with Department of Inspections regarding accepted payment methods and surcharge policies.

Work That Does NOT Require a Permit

Exterior painting of residential properties (exterior painting in historic districts requires a historical permit)

Important: Many other work types require permits, including additions, alterations, decks, demolition, fences, roofing, siding, and more. Confirm your specific project with the Department of Inspections.

Inspections

How to Schedule

Department of Inspections, 2nd Floor, City Hall (in-person)
Building: (609) 989-3571; Electrical: (609) 989-3587; Plumbing: (609) 989-3546; Fire: (609) 989-3555 (phone)

Scheduling deadline: Requests must be submitted at least 48 hours prior to desired inspection time.
Inspection hours: Monday - Friday, 8:30 AM to 4:30 PM

Typical inspection sequence: Required inspections at various phases of construction. Final inspection required before Certificate of Occupancy is issued.

Additional Resources

Building code: New Jersey Uniform Construction Code (NJ UCC) and Uniform Fire Code
Verify contractor license: NJ Division of Consumer Affairs License Verification
Trenton Website
Contractor Verification
License lookup guide: New Jersey Contractor License Requirements
Contract template: New Jersey Homeowner-Contractor Agreement
New Jersey hub: New Jersey Contractor License & Permit Hub

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Division of Technical Services, Department of Inspections before applying.

Frequently Asked Questions

Trenton Building Permit FAQ

Do I need a building permit in Trenton, NJ?: All construction, alteration, repair, demolition, or change in occupancy requires a permit and compliance with the New Jersey Uniform Construction Code and Uniform Fire Code.
How much does a building permit cost in Trenton, NJ?: The minimum permit fee is Contact Department of Inspections for current fee schedule. Fees are calculated as: Based on project type, scope, construction value, and square or cubic footage.. Plan check fee: Calculated as percentage of permit fee.
How do I apply for a building permit in Trenton, NJ?: 1. Contact the Project Application Review Committee (PARC) for Planning and Zoning requirements and approvals. 2. Prepare two sets of sealed plans (three sets for restaurants) completed by a New Jersey-licensed architect or engineer. 3. Submit plans to the Department of Inspections, 2nd Floor, City Hall. 4. Plan review is completed within 20 working days from the time the construction inspector accepts the plans. 5. Single trade permits are issued within 48 hours of acceptance. 6. Pay all required permit, plan review, and application fees. 7. Proceed with construction and schedule inspections as work progresses.
How long does it take to get a building permit in Trenton, NJ?: Typical processing time is 20 working days for plan review; 48 hours for single trade permits..
What work is exempt from building permits in Trenton, NJ?: The following work is generally exempt: Exterior painting of residential properties (exterior painting in historic districts requires a historical permit). Note: Many other work types require permits, including additions, alterations, decks, demolition, fences, roofing, siding, and more. Confirm your specific project with the Department of Inspections.
How do I schedule a building inspection in Trenton, NJ?: Inspections can be scheduled via: Department of Inspections, 2nd Floor, City Hall, Building: (609) 989-3571; Electrical: (609) 989-3587; Plumbing: (609) 989-3546; Fire: (609) 989-3555. Requests must be submitted at least 48 hours prior to desired inspection time..

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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