Door Knob Lock Replacement
Franklin Square sits at a busy crossroads of Nassau County — commuters cutting through from Hempstead Turnpike, families in close-knit neighborhoods off Dogwood Avenue, and small businesses lining up along Washington Street. With that kind of daily foot traffic in and out of homes and storefronts, a worn or failing door knob lock is not a minor nuisance — it is a genuine security gap. Whether the knob spins freely without catching the latch, the key no longer turns smoothly, or the lock was visibly forced, our mobile technicians come directly to your address in Franklin Square and handle the replacement on the spot, without you hauling anything anywhere.
Open 24 hours, 7 days a week · Licensed, bonded & insured
Franklin Square NY Locksmith is a 24/7 mobile locksmith service built around one promise: trained, insured technicians arrive at your door — not the other way around. We handle door knob lock replacement for interior privacy knobs, keyed entry sets, and heavy-duty mortise lock assemblies across residential homes, rental units, and commercial properties throughout the Franklin Square area. Every job begins with a damage-free assessment and a confirmed up-front price before a single screw is turned.
What we do
Available 24/7
Day, night, weekends and holidays — a real local locksmith answers and rolls a fully-stocked van.
Fast local response
Based in Franklin Square, we reach the Franklin Square area in well under an hour.
Insured & background-checked
Vetted technicians, up-front pricing, and no surprise add-ons when we arrive.
Damage-free entry
We pick and bypass locks the right way, so most lockouts are solved without drilling anything.
Frequently asked questions
Can you replace a door knob lock on the same visit as a lockout call?+
Yes, in most cases. If you are locked out and the knob lock is also damaged or you want to upgrade to a more secure option, our technician carries replacement hardware on the truck. After verifying ownership of the property, we can complete the lockout and perform the door knob lock replacement in a single visit. Just mention both needs when you call 516-212-6909 so we can confirm parts availability before dispatch.
How much does a local locksmith charge for door knob replacement in Franklin Square?+
There is no universal flat rate because the total depends on the hardware grade selected, whether the existing door prep accommodates the new lock without modification, the time of day, and travel distance to your Franklin Square location. A basic interior privacy knob swap costs far less than a commercial mortise lock replacement. We confirm an exact price with you before starting any work — no surprise charges at the end.
I've seen videos about how to pick a door knob lock — should I try it myself during a lockout?+
We strongly advise against attempting to pick or bypass your own lock without professional training. Improper technique can damage the cylinder pins, break a pick tool inside the keyway, and leave the lock permanently inoperable — turning a lockout into a full replacement situation. The legitimate first steps are: check for a spare key with a neighbor or family member, verify whether another entry point is accessible, and if not, call a professional. Our technicians arrive quickly across Franklin Square and verify ownership before any entry work begins. That protects both you and the integrity of the lock.
What is the difference between a mortise lock and a standard door knob with lock?+
A standard cylindrical knob lock fits into two bored holes in the door face and edge — it is the most common residential setup. A mortise lock is a larger, self-contained mechanism that slides into a rectangular pocket routed into the door edge, with separate trim pieces (knobs, levers, or thumb-turns) attached to the body. Mortise lock sets are more robust and were standard in construction through the mid-20th century, so they appear frequently in older Franklin Square homes. Replacing a mortise lock requires sourcing a compatible cartridge or full body unit and is more labor-intensive than a cylindrical swap, which affects the final quote.
Can a locksmith program my key fob on-site, or do I need to go to a dealer?+
Many key fob programming requests can be handled on-site by our automotive locksmith technicians without a dealer visit. The ability to program on location depends on the vehicle's make, model, year, and the specific security system it uses. Some manufacturers restrict programming to dealer-level diagnostic equipment, while others allow aftermarket on-site programming. When you call, share your vehicle details and we will tell you upfront whether on-site programming is feasible for your car before dispatching.
Do you install double lock door knobs for front entry doors?+
Yes. A double lock door knob — meaning the knob has a keyed cylinder on both the exterior and interior sides — is a specific security configuration some homeowners prefer for entry doors where a nearby glass panel could otherwise allow someone to reach in and turn an interior thumb-turn. We stock and install these configurations and can advise whether the added security benefit makes sense for your specific door setup during the on-site assessment.