Lock Replacement in Newark, NJ

How old is the door

Across New Jersey, about 17 percent of homes were built in 1939 or earlier and nearly 38 percent from 1950 through 1979, according to the Census Bureau's 2024 American Community Survey. Newark's neighborhoods sit at both ends of that span, and the age of a door decides what a new lock has to fit.

• Forest Hill (North Ward). Hundreds of stately homes went up from the 1870s to the 1920s along the east edge of Branch Brook Park. Where an original door survives, the replacement has to suit that door rather than the other way around.
• James Street Commons. This 22-block historic district keeps late-19th-century homes and Washington Park, the city's oldest commons. Doors of that age may have been built for mortise locks, with the lock body in a pocket cut into the door edge.
• Elizabeth Avenue towers in Weequahic. 440 Elizabeth Avenue dates from 1970 and Zion Towers from 1972. Under N.J.A.C. 5:10-19.2, shared entrance doors in buildings of three or more units need heavy-duty dead-latching locksets, and the landlord must supply the entrance and unit locks, so tenants should go through management.

This is general information, not legal advice.

Replacing without cutting an old door

Replacement makes sense when a lock is worn past adjustment, damaged, or no longer suits how the door is used. On older doors, how the new hardware fits matters most.

• Match the existing prep. A new mortise lockset sized to the existing pocket and faceplate avoids enlarging holes in an old door.
• Converting to a bored lock. Moving from a mortise lock to a standard cylindrical lock usually means filling the old pocket and drilling new holes, which is hard to undo on a period door.

What to send

Send photos of both sides of the door and of the edge showing the faceplate, the door thickness if you can measure it, your neighborhood, and whether it is a house door, a shared entry or an apartment door. If the lock mostly works but sticks or drags, lock repair may be the better first step. The lock replacement page covers the service in general. Newark's other local rules are on the Newark page.