How much does a building permit cost in Borough of Princeton, NJ?

The minimum permit fee is Contact Building and Construction Department for current fee schedule. Fees are calculated as: Based on project scope, type, and estimated construction value. Plan check fee: Percentage of permit fee as established by municipal ordinance.

How do I apply for a building permit in Borough of Princeton, NJ?

1. Review Prior Approval Requirements at https://www.princetonnj.gov/187/Construction-Prior-Approval-Requirements 2. Obtain all required prior approvals and signoffs (e.g., PSOC for sewer connections on additions/new construction with bedrooms). 3. For new single-family home construction: prepare 2-3 sets of signed and sealed plans by a registered design professional. 4. Include required documentation: Construction Permit Application, subcode technical sections, New Jersey New Home Builder's Registration, PSOC Sewer Connect Permit, Prior Approval Signoff Sheet. 5. For additions: confirm Zoning Approval including HVAC documentation if adding or replacing HVAC. 6. For demolition: obtain releases from Gas, Electric, Water, and Pest Control companies. 7. Submit complete application to the Department of Building and Construction. 8. Pay all required permit and plan review fees. 9. Schedule inspections as work progresses.

What work is exempt from building permits in Borough of Princeton, NJ?

The following work is generally exempt: Ordinary repairs as defined by the New Jersey Uniform Construction Code. Note: All exemptions must be confirmed directly with the Building and Construction Department. Most construction activities require a permit.

How do I schedule a building inspection in Borough of Princeton, NJ?

Inspections can be scheduled via: (609) 924-2345, Department of Building and Construction, 400 Witherspoon Street. Requests must be made at least 48 hours prior to desired inspection time..

City Building Permits

Borough of Princeton, NJ - 2026 Building Permit Guide

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

New Jersey Mercer County Updated March 2026

Permit Authority

All construction activities within the Borough of Princeton, enforcing the New Jersey Uniform Construction Code.

Department: Department of Building and Construction
Address: 400 Witherspoon Street, Princeton, NJ 08542
Phone: (609) 924-2345
Website: https://www.princetonnj.gov/185/Building-Construction

Online Permit Portal

Open Princeton Building and Construction Portal

Platform: City Portal • Account required: No • Submission: Online only

Additional resources:

Application Process

Review Prior Approval Requirements at https://www.princetonnj.gov/187/Construction-Prior-Approval-Requirements
Obtain all required prior approvals and signoffs (e.g., PSOC for sewer connections on additions/new construction with bedrooms).
For new single-family home construction: prepare 2-3 sets of signed and sealed plans by a registered design professional.
Include required documentation: Construction Permit Application, subcode technical sections, New Jersey New Home Builder's Registration, PSOC Sewer Connect Permit, Prior Approval Signoff Sheet.
For additions: confirm Zoning Approval including HVAC documentation if adding or replacing HVAC.
For demolition: obtain releases from Gas, Electric, Water, and Pest Control companies.
Submit complete application to the Department of Building and Construction.
Pay all required permit and plan review fees.
Schedule inspections as work progresses.

Typical processing time: Varies by project complexity; processing time depends on completeness of application and approval timelines.

Source: Department of Building and Construction

General Requirements

A construction permit is required for all new construction, additions, alterations, repairs, demolition, and changes in occupancy.

Required Documents

2-3 sets of signed and sealed plans prepared by a registered design professional (NJ-licensed architect or engineer)
Construction Permit Application
Applicable subcode technical sections (Building, Electrical, Plumbing, Fire Protection, Mechanical, Elevator)
For bedroom additions: Princeton Sewer Operating Committee (PSOC) sewer signoff prior to application
For new construction: New Jersey New Home Builder's Registration and PSOC Sewer Connect Permit
For demolition: releases from Gas, Electric, Water, and Pest Control companies
Prior Approval Signoff Sheet
Zoning Approval (for additions/expansions)

Permit validity: 12 months from the date of the last inspection per New Jersey Uniform Construction Code.
Building code: New Jersey Uniform Construction Code (NJUCC), International Building Code (IBC) - NJ Edition, International Residential Code (IRC) - NJ Edition, National Electrical Code (NFPA 70), NFPA Fire Codes, New Jersey Uniform Fire Code
Owner-builder: All construction documents must be prepared by a registered design professional (NJ-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. Licensed trades must hold appropriate state licenses (34EB, 36BI, 19HC, etc.). Certificate of Occupancy required before occupancy.

Fees

Minimum permit fee: Contact Building and Construction Department for current fee schedule
Plan check fee: Percentage of permit fee as established by municipal ordinance
Permit fee formula: Based on project scope, type, and estimated construction value
Trade permit fee: Separate fees for each subcode (Building, Electrical, Plumbing, Fire Protection, Mechanical, Elevator)
Payment note: Consult with Building and Construction Department regarding accepted payment methods.

Work That Does NOT Require a Permit

Contact the Department of Building and Construction to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

(609) 924-2345 (phone)
Department of Building and Construction, 400 Witherspoon Street (in-person)

Scheduling deadline: Requests must be made 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 include footing/foundation, structural framing, electrical rough, plumbing rough, insulation, and final inspections for each applicable subcode. Work that will be concealed must receive inspection before being covered. Complete copy of department-approved plans must be kept on job site.

Additional Resources

Building code: New Jersey Uniform Construction Code (NJUCC), International Building Code (IBC) - NJ Edition, International Residential Code (IRC) - NJ Edition, National Electrical Code (NFPA 70), NFPA Fire Codes, New Jersey Uniform Fire Code
Verify contractor license: NJ Division of Consumer Affairs License Verification
Princeton Website
Princeton Sewer Operating Committee
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 Department of Building and Construction before applying.

Frequently Asked Questions

Borough of Princeton Building Permit FAQ

Do I need a building permit in Borough of Princeton, NJ?: A construction permit is required for all new construction, additions, alterations, repairs, demolition, and changes in occupancy.
How much does a building permit cost in Borough of Princeton, NJ?: The minimum permit fee is Contact Building and Construction Department for current fee schedule. Fees are calculated as: Based on project scope, type, and estimated construction value. Plan check fee: Percentage of permit fee as established by municipal ordinance.
How do I apply for a building permit in Borough of Princeton, NJ?: 1. Review Prior Approval Requirements at https://www.princetonnj.gov/187/Construction-Prior-Approval-Requirements 2. Obtain all required prior approvals and signoffs (e.g., PSOC for sewer connections on additions/new construction with bedrooms). 3. For new single-family home construction: prepare 2-3 sets of signed and sealed plans by a registered design professional. 4. Include required documentation: Construction Permit Application, subcode technical sections, New Jersey New Home Builder's Registration, PSOC Sewer Connect Permit, Prior Approval Signoff Sheet. 5. For additions: confirm Zoning Approval including HVAC documentation if adding or replacing HVAC. 6. For demolition: obtain releases from Gas, Electric, Water, and Pest Control companies. 7. Submit complete application to the Department of Building and Construction. 8. Pay all required permit and plan review fees. 9. Schedule inspections as work progresses.
How long does it take to get a building permit in Borough of Princeton, NJ?: Typical processing time is Varies by project complexity; processing time depends on completeness of application and approval timelines..
What work is exempt from building permits in Borough of Princeton, NJ?: The following work is generally exempt: Ordinary repairs as defined by the New Jersey Uniform Construction Code. Note: All exemptions must be confirmed directly with the Building and Construction Department. Most construction activities require a permit.
How do I schedule a building inspection in Borough of Princeton, NJ?: Inspections can be scheduled via: (609) 924-2345, Department of Building and Construction, 400 Witherspoon Street. Requests must be made 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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