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§ 02
When a permit is required
Permit triggers and exempt work for Princeton
A construction permit is required for all new construction, additions, alterations, repairs, demolition, and changes in occupancy.
Ordinary repairs as defined by the New Jersey Uniform Construction Code
- 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.
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)
- 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
- Permit validity
- 12 months from the date of the last inspection per New Jersey Uniform Construction 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.
§ 03
Application process
Typical processing: Varies by project complexity; processing time depends on completeness of application and approval timelines.
- 01 Review Prior Approval Requirements at https://www.princetonnj.gov/187/Construction-Prior-Approval-Requirements
- 02 Obtain all required prior approvals and signoffs (e.g., PSOC for sewer connections on additions/new construction with bedrooms).
- 03 For new single-family home construction: prepare 2-3 sets of signed and sealed plans by a registered design professional.
- 04 Include required documentation: Construction Permit Application, subcode technical sections, New Jersey New Home Builder's Registration, PSOC Sewer Connect Permit, Prior Approval Signoff Sheet.
- 05 For additions: confirm Zoning Approval including HVAC documentation if adding or replacing HVAC.
- 06 For demolition: obtain releases from Gas, Electric, Water, and Pest Control companies.
- 07 Submit complete application to the Department of Building and Construction.
- 08 Pay all required permit and plan review fees.
- 09 Schedule inspections as work progresses.
Typical processing time: Varies by project complexity; processing time depends on completeness of application and approval timelines.
§ 04
Fee schedule
Princeton building permit fees
Fee type
Amount
01
Minimum permit fee
Contact Building and Construction Department for current fee schedule
02
Plan check fee
Percentage of permit fee as established by municipal ordinance
03
Permit fee formula
Based on project scope, type, and estimated construction value
04
Trade permit fee
Separate fees for each subcode (Building, Electrical, Plumbing, Fire Protection, Mechanical, Elevator)
Consult with Building and Construction Department regarding accepted payment methods.
§ 05
Required inspections
Scheduling and sequence
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 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.
§ 06
Frequently asked
Common questions about Princeton permits
01 Do I need a building permit in Princeton, NJ? ▸
A construction permit is required for all new construction, additions, alterations, repairs, demolition, and changes in occupancy.
02 How much does a building permit cost in Princeton, NJ? ▸
Building permit fees in Princeton, NJ are set by the local building department and vary by project type and valuation. 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.
03 How do I apply for a building permit in Princeton, NJ? ▸
To apply for a building permit in Princeton, NJ, follow these steps: 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.
04 How long does it take to get a building permit in Princeton, NJ? ▸
Building permit processing times in Princeton, NJ typically run Varies by project complexity; processing time depends on completeness of application and approval timelines.. Timelines can vary based on project complexity and current department workload.
05 What work is exempt from building permits in Princeton, NJ? ▸
Not all construction work requires a permit in 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. When in doubt, confirm with the local building department before starting work.
06 How do I schedule a building inspection in Princeton, NJ? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Princeton, NJ 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..
last verified April 2026
source Department of Building and Construction ↗
entry id permits/new-jersey/mercer/princeton
Educational reference. Permit rules and fees change — confirm current requirements directly with Department of Building and Construction before applying. Jaspector is not legal advice.