Door Knob Lock Replacement

A rekey changes the internal pin configuration so a new key operates the same cylinder — it's the right call when the lock mechanism itself is functioning correctly but you want to void access for old keys (after a move-in or a lost key, for example). A full replacement is necessary when the cylinder, spindle, latch mechanism, or housing is physically damaged, corroded, or worn. Our technician will assess the hardware on arrival and give you an honest recommendation before any work starts.

In the vast majority of cases, yes. Modern cylindrical knob locks are designed with standard bore dimensions, and our technicians carry installation tools that allow clean removal and reinstallation without marring the finish or splitting the door edge. Older doors with non-standard prep cuts or significant wood damage around the bore may require minor remediation, which we identify and communicate before proceeding. Damage-free installation is always our goal.

A standard cylindrical knob lock mounts through two bored holes in the door face and relies on a latch bolt for holding. A mortise lock is a larger cassette-style assembly that recesses into a pocket in the door edge, integrating a latch bolt, deadbolt, and often an anti-pick cylinder into one hardened unit. Mortise locks are generally more resistant to torque attacks and physical force, making them the preferred choice for exterior commercial doors and high-traffic entry points. We can assess your current door and recommend the appropriate grade of hardware for your security needs.

Yes. Sliding door lock replacement is a separate but equally important service — patio and sliding glass doors use a completely different mechanism (typically a hook bolt or multi-point latch that engages a track-mounted strike), and failed hardware on a sliding door is a significant security gap. Our technicians carry sliding door hardware for common door sizes and can replace a worn or broken assembly in the same visit as other lock work if needed.

There is no flat answer because the final price reflects several variables: the type of lock being replaced, the time of call, parts required, and any additional work the door needs (like strike plate reinforcement). What we can promise is that we provide a confirmed, up-front quote before any work begins — no on-site price changes, no hidden fees. Call (201) 977-1100 at any hour and we'll give you a clear picture of what the job will cost before we start.

We strongly advise against attempting to pick or force open any lock yourself. Beyond the risk of damaging the lock or door — which turns a simple lockout into a more costly repair — improper techniques can permanently jam the cylinder, making professional extraction harder and more expensive. The safest first steps are checking for a spare key with a neighbor or family member and verifying all other entry points. If you're still locked out, call a trained technician. Our emergency locksmith team responds 24/7 and can typically reach most Hillsdale addresses quickly — it's faster, safer, and less damaging than a DIY attempt.