Rekey & Lock Change

A rekey and a lock change both achieve the same fundamental goal — making sure old keys no longer work — but they get there in very different ways. When a locksmith rekeyes a lock, the internal pin tumblers inside the cylinder are reconfigured to match a brand-new key. The lock hardware itself stays on the door. This is an ideal solution when your existing deadbolts and knob locks are in good condition and you simply need to cut off access for a previous tenant, a former roommate, an ex-partner, or anyone who may have had a copy of your key. It is fast, effective, and your door hardware stays intact.

A full lock change — swapping out the existing lock for entirely new hardware — makes more sense in different circumstances: when the current lock is worn, damaged, or a low-security grade that no longer meets your needs; when you are upgrading to a higher-security deadbolt such as a Schlage B-series or a Kwikset SmartKey model; when the lock has been compromised in a break-in attempt; or when you simply want a fresh start with modern hardware. Our technicians carry a range of residential and commercial-grade cylinders and deadbolts on the truck, so most lock change services can be completed in a single visit without a parts delay.

The situations that bring Princeton-area residents and businesses to us are almost always time-sensitive. New homeowners closing on a property near Palmer Square or in the Lawrence Road corridor often call us the same day they receive their keys — and rightly so, because there is simply no way to know how many copies of the original key exist or who holds them. Renters moving into apartments near graduate student housing on Harrison Street face the same uncertainty. In commercial settings — offices along Route 1, retail spaces in Nassau Park Pavilion, or multi-tenant buildings throughout Mercer County — a staff departure or a lost master key can create a real security gap that demands same-day attention.

Lost keys are another common trigger. If your keys have disappeared and you are not certain they were simply misplaced, rekeying or replacing your locks is the responsible step, especially when the keys carry any identifying information that could link them to your address. Our mobile locksmith team can arrive, assess the situation, and have your home or business secured with new working keys before the end of the visit. We do not require you to bring the lock to a shop — we bring the shop to you.

Princeton NJ Locksmiths handles a broad range of residential, commercial, and specialty lock work. Below is a representative list of the specific services our trained technicians perform on every call:

1. Residential deadbolt rekeying — single and double cylinder. 2. Knob and lever lock rekeying on interior and exterior doors. 3. Full door lock change on entry doors, side doors, and back doors. 4. Master key system setup — rekey multiple locks to one key. 5. Commercial lock change on office and storefront doors. 6. High-security cylinder upgrades (Schlage, Kwikset, and equivalent grades). 7. Kwikset SmartKey rekeying — including resetting after a code or key change. 8. Electronic and keypad deadbolt installation and programming. 9. Honeywell door lock change code reset and reprogramming. 10. Defiant lock change code reset for keypad models. 11. Master lock change combination service for padlocks and gate locks. 12. Sliding glass door lock replacement and patio door lock rekeying. 13. Mailbox lock change and rekeying. 14. Storage unit and shed padlock replacement. 15. Multi-family building common-area lock rekeying. 16. Apartment complex rekeying between tenants. 17. Commercial deadbolt and mortise lock replacement. 18. Door hardware replacement including handles, knobs, and levers. 19. Lock change after break-in or attempted forced entry. 20. Lock change after eviction or tenant dispute (with appropriate documentation). 21. ANSI Grade 1 and Grade 2 residential upgrade installations. 22. Rekey to match — making all locks in a home work with one key. 23. Cabinet and interior room lock rekeying (home offices, server rooms). 24. Gate lock installation and replacement for residential and commercial properties. 25. Emergency after-hours rekey or lock change — 24/7 dispatch available.

We understand that cost is a real concern, and we are committed to full transparency before any work begins. Our technicians confirm an exact up-front price with you before touching the lock — there are no surprise charges after the job is done. Several factors shape that quote: the type and brand of lock involved (a basic knob lock rekey differs from a commercial-grade mortise cylinder replacement), the number of locks being serviced in a single visit, the time of day or night the call comes in, the travel distance to your Princeton-area location, and whether new parts are needed for a full lock change versus a rekey that uses the existing hardware.

For commercial lock change requests, the hardware grade, the number of keyways, and whether a master key system is being established or expanded also factor into the final figure. The best way to get an accurate number is simply to call us at (609) 469-6449 — describe your situation, the type of door hardware you have, and your location, and we will give you a straightforward price before we ever roll a truck.

When you call Princeton NJ Locksmiths, a real person answers — any hour, including nights, weekends, and holidays. We will ask a few short questions about your location, the type of lock or door involved, and the situation (new move-in, lost keys, post-break-in, etc.). We will give you an up-front price estimate and an honest ETA, and then dispatch the nearest available technician.

Our technicians arrive in a fully equipped mobile unit carrying a selection of lock hardware, rekeying kits, and programming tools for electronic locks — including Honeywell and Defiant keypad models. Identity and ownership verification is a standard part of our process; for residential calls we confirm occupancy, and for commercial calls we work with the property manager, business owner, or authorized representative. Once verified, the technician completes the rekey or lock change as discussed, tests every new key in front of you, and walks you through any new features if you have upgraded to a keypad or smart lock. We leave only after you are satisfied that every lock operates correctly. Call (609) 469-6449 — we answer 24/7 and are ready to dispatch right now.