Contact or visit HPO
Main Line
609-940-4312
Find individual staff by office section and role.
Mailing address
Mail Code 501-04B
NJ Historic Preservation Office
Dept. of Environmental Protection
PO Box 420
Trenton, NJ 08625-0420
Hardcopy submissions are not directly delivered to individual staff by mail carriers, but stamped and logged into our central project log before distribution. If you are visiting our office, please do not drop off submissions directly in reviewers’ cubes.
Use the mailing code address, not our physical location, for all U.S. Postal Service mail.
Use HPO’s Email Submittal Form to submit project and other review requests and documentation for easier project tracking.
Send a basic question or comment.
Visit
Research or meeting visitation to HPO is currently by appointment. Visitors must bring identification and check in with the security guard in the lobby, after which assigned HPO staff will escort visitors to our offices.
Our office
501 East State Street
Station Plaza Building 5, 4th floor
Trenton, NJ 08625
Bus service
Bus stops are located at The Trenton Transit Center, South Clinton Avenue outside of our courtyard, and in front of the main DEP building at 401 East State Street.
Rail service
The Trenton Transit Center station is located two blocks from the HPO at South Clinton and Wallenberg Avenues.
Metered parking
Visitors can use metered on-street parking for up to 8 hours.
The City of Trenton now uses kiosks on nearby streets instead of individual parking meters. You can now pay through either the Flowbird app or the kiosk itself, which accepts both cash and credit cards. If you plan to use paper bills, the kiosks only accept $1 or $5 bills and will not provide change.
Station Plaza Parking Facility
The “Station Plaza” garage stairwell faces our courtyard. Enter the garage through the Yard Avenue (off South Clinton Avenue) and/or Wallenberg Avenue entrances.
This parking facility no longer uses paper tickets or on-site payments. Before arriving, we recommend installing the owner’s app (NexPass App) and following setup instructions to use the garage more easily. If you plan repeat visits, registering your car and payment method with the app will let you use the gate’s license plate reader and automatically pay as you leave. Otherwise, you will need to have your phone ready at both entry and exit to scan a QR code.
