Home lock and key work in New Jersey
What the work is, what it should cost, and what to ask before you authorize any of it.
Residential lock work in New Jersey covers rekeying cylinders, fitting deadbolts, installing smart locks, and getting a snapped key out of a lock that still works. None of it is complicated once you know what a licensed locksmith is actually doing. What makes it expensive, or makes it a scam, is almost always what happens in the first five minutes on the doorstep. This page explains the work so you can tell those two situations apart.
Jobs in this category
Key snapped in the lock
Why keys snap, how a licensed locksmith gets one out without drilling, when the cylinder has to be replaced, and what it costs in New Jersey in 2026.
$95 to $285Deadbolt supply and fitting
What ANSI grades actually measure, what door and frame prep a deadbolt needs, and what supply and fitting costs in New Jersey in 2026.
$145 to $475Rekeying: same lock, different key
How rekeying works, when it beats replacing the lock, what it costs per cylinder in New Jersey in 2026, and what to ask before authorizing the work.
$20 to $50Smart lock installation
Retrofit versus full replacement, the door prep that decides whether a smart lock survives, and what installation costs in New Jersey in 2026.
$155 to $525What a licensed locksmith actually does
- 01
The license check
This is yours to do, not theirs. Search the business name on the New Jersey Division of Consumer Affairs lookup before the visit if you have the time, and ask for the license number if you do not.
- 02
Identification at the door
A licensed locksmith asks for photo identification matching the address before opening any residential door. Someone who does not ask is either careless or is not planning to be traceable.
- 03
Looking at the door before quoting
The bolt is thrown, the strike is checked, the frame is checked for movement. A price given before this happens is a number, not a quote.
- 04
A written total before work starts
Service call, labor, parts, tax, and any after-hours or holiday charge, on paper, agreed before a tool comes out of the bag.
- 05
The work, then the keys
You should leave with every key that operates the lock, a written invoice, and the business name and license number printed on it.
Three doors, three keys
On a two-family or three-family in Newark, Jersey City or Paterson, a resident carries a key for the stoop door, a key for the vestibule door and a key for the unit door. It is almost never the same key. That one fact reshapes every job on this page.
A rekey is not one cylinder, it is three. A lockout is not “the door,” it is whichever door in the sequence closed behind you. A phone quote given without asking how many doors and how many cylinders is a price for a job nobody has understood yet.
Old hardware changes the work
About 19 percent of New Jersey homes predate 1940, against 11.4 percent nationally. Hudson County runs 22.6 percent. In practice that means mortise locksets rather than the bored cylindrical hardware most modern products assume, non-standard backsets and door thicknesses, hardware painted over several times, and frames that have shifted enough that “the lock is broken” turns out to be a strike and alignment problem.
The seasonal version arrives every late February and March. Freeze and thaw heaves frames and swells wood doors. The key turns, the bolt throws, and the door still will not latch. Nothing inside the cylinder is wrong.
Check the license before anyone starts
New Jersey licenses locksmiths. Most states do not, which makes the state lookup the single most useful thing a New Jersey resident can know about. Search the business name at the Division of Consumer Affairs verification site, and ask for the license number at the door if you did not get it on the phone.
Two things a licensed business owes you under N.J.A.C. 13:31A-1.13:
- Every advertisement it runs carries the licensee name, the license number, and the street address and telephone number of the business office.
- Every service vehicle is lettered on both sides with the business name, license number and municipality, in characters at least three inches tall.
An unmarked car in your driveway is not just a bad feeling. It is a documentable violation, and the Division of Consumer Affairs takes complaints about it.
Licensed locksmith businesses also carry general liability coverage and a surety bond in favor of the State under N.J.A.C. 13:31A-2.6. That is the money that exists if something goes wrong. An unlicensed operator has none of it.
The four residential jobs
- Rekeying. The pins inside a cylinder you already own get changed so the old keys stop working. Priced per cylinder, which is why the three-door count matters.
- Deadbolt supply and fitting. New hardware, plus the door and frame prep to make it throw cleanly and stay thrown.
- Smart lock installation. Mostly a door prep and alignment job wearing an electronics costume.
- Broken key extraction. A snapped key comes out of a cylinder that usually survives the experience.
What moves the price
Time of day first, then how many cylinders, then the age and condition of the door. New Jersey limits a licensee’s advertised fees to a fixed fee or a stated range for specifically described services, which is why every number here is a range with a date on it. One flat number for an unseen door is worth a second question.
Ask these
- What is the licensed business name and license number, so I can check it on the state lookup before you start?
- What is the total, including the service call, labor, parts, tax and any after-hours charge?
- Is that a firm price or an estimate, and what specifically would change it once you are looking at the door?
- Are you the licensee, an employee of the licensee, or a subcontractor for another company?
- How many cylinders and how many doors are you pricing? A stoop door, a vestibule door and a unit door are three.
- If the lock cannot be opened without damage, what do you do next and what does that cost?
Red flags
- A price quoted on the phone with no questions about how many doors or what kind of hardware.
- An unmarked vehicle. New Jersey requires the business name, license number and municipality on both sides in lettering at least three inches tall.
- An advertisement or website with no license number anywhere on it.
- No request for identification before opening a residential door.
- Drilling proposed as the opening move, before anything less destructive is tried.
- Cash only, or no written invoice with a business name on it.
- A phone number that reaches a call center that cannot name the locksmith who will show up.
Sources
Common questions
Does New Jersey actually license locksmiths?
Yes. New Jersey is one of the minority of states that does. Licensing runs through the Division of Consumer Affairs, under the Fire Alarm, Burglar Alarm and Locksmith Advisory Committee. Both individual locksmiths and locksmith businesses are licensed, and both can be looked up by name on the state verification site.
Is rekeying cheaper than replacing the lock?
Usually, when the hardware itself is sound. Rekeying changes the pins inside the cylinder you already own so the old keys stop working. Replacement means new hardware plus the labor to fit it. The judgment about which one a specific door needs belongs to the licensed locksmith looking at that door.
Why is the after-hours price so much higher?
A residential lockout at eleven at night is a single call that occupies one person and one vehicle at a time when almost nothing else is booked. Every New Jersey market prices that premium. What is not legitimate is quoting the daytime number on the phone and producing the night number on the doorstep.
My key turns but the door will not latch. Is the lock broken?
Often it is not. New Jersey's freeze and thaw cycle heaves frames and swells wood doors, so the bolt throws fine and simply no longer lines up with the strike. This wave arrives in late February and March every year and gets misdiagnosed as a dead lock constantly.
Can a locksmith tell me which lock to buy?
A licensed one can. New Jersey puts consulting and technical advice on the selection of hardware and locking systems inside the licensed definition of locksmithing under N.J.S.A. 45:5A-2(n), so that recommendation has to come from a licensee looking at your door. This site explains what the categories mean and stops short of choosing for you.