Rekey & Door Knob Lock Service

Rekeying a lock changes the internal pin configuration inside the cylinder so that old keys no longer work. The hardware stays in place; only the tumblers are replaced. This means a previous tenant, a former contractor, or an ex-partner's copy of your key becomes useless overnight — without the expense of replacing every lock on the property. For homeowners along Pelham Road, rental property managers near downtown Greenville, and small business owners on Woodruff Road, rekeying is often the single highest-impact security upgrade per dollar spent.

Our technicians rekey all common residential and commercial lock brands, including Schlage, Kwikset, and Baldwin, as well as higher-security lines. After every rekey job we test each key multiple times in each cylinder before we leave, confirming smooth operation and proper engagement. If a cylinder is worn or damaged and rekeying alone won't restore reliable function, we'll tell you up front — and quote the replacement before touching anything.

A door knob with lock is still the most common entry hardware on residential doors across the Upstate, but not all knob locks are created equal. Builder-grade knobs installed in tract homes frequently use thin latch bolts and lightweight cylinders that offer minimal resistance. Our team can assess what you currently have, explain its real-world vulnerabilities, and install a quality replacement — whether that's a reinforced keyed knob lock, a double lock door knob setup that combines a knob and a deadbolt on the same door, or a smart lock door knob that lets you control access from your phone.

We also handle door knob with lock for bedroom installations — privacy locks, keyed guest-room locks for short-term rental properties, and keyed-alike sets so one key opens multiple doors in your home. For exterior doors we always recommend pairing any knob lock with a single or double cylinder deadbolt for layered protection. If you're unsure which configuration is right for your door thickness, frame condition, or rental policy, our technicians will walk you through the options on-site before any work begins.

A mortise lock is a different animal from a standard knob or deadbolt. It's a complete lock body that's mortised — recessed — directly into the door edge, integrating the latch, deadbolt, and sometimes an auxiliary bolt into one robust unit. Mortise locks are the industry standard for commercial storefronts, office suites, and multi-family building entries throughout downtown Greenville and the surrounding business districts. They handle constant daily cycling far better than cylindrical locks, and when properly installed they provide a much larger throw bolt bearing surface against the strike plate.

As a full-service commercial locksmith, A1 Greenville Locksmith installs, repairs, and rekeyes mortise lock hardware on wood, metal, and hollow-metal doors. We stock common replacement cylinders and parts in our service vehicles so most mortise lock jobs are completed in a single visit. If you manage a strip center on Pleasantburg Drive, an office building near Haywood Mall, or a restaurant with high after-hours security needs, call (631) 380-4138 to schedule a site assessment — we answer 24/7.

Being locked out of your home or business is stressful, but the response should always start with the safe, non-destructive steps: check every other entry point, confirm whether a trusted neighbor or property manager holds a spare key, and verify you have documentation that establishes your right to access the property. Once you've confirmed no unlocked entry exists, that's exactly when to call an emergency locksmith rather than attempt any bypass on your own — amateur attempts on a knob lock or mortise lock often bend strike plates, snap cylinders, or damage door frames in ways that cost significantly more to repair than a professional service call.

Our mobile emergency response covers all of Greenville County, including Simpsonville, Mauldin, Taylors, and Greer. When you call, we confirm your location, dispatch the nearest available technician, and provide an exact up-front price before any work begins. The final quote accounts for factors like the lock type and brand, parts needed, your distance from our current dispatch point, and the time of day — there are no surprise charges added after the job. We work damage-free wherever the lock condition allows, protecting both your door and your door frame throughout the process.

We provide a comprehensive range of lock and key services so you're never sent elsewhere: residential lock rekeying, commercial lock rekeying, master key system setup and rekeying, mortise lock installation, mortise lock repair, mortise lock cylinder replacement, standard knob lock installation, keyed-entry knob lock replacement, double lock door knob installation, smart lock door knob installation and programming, deadbolt installation (single cylinder), deadbolt installation (double cylinder), deadbolt and knob combo plate installation, keypad lock installation, high-security lock upgrades (Medeco, Mul-T-Lock, Schlage B-series), lock-out service for homes, lock-out service for businesses, door knob with lock for bedroom (privacy and keyed), keyed-alike lock sets across multiple doors, lock hardware consultation and security assessment, door frame and strike plate reinforcement, lock repair after attempted break-in, new construction lock installation, tenant change-over rekeying for rental properties, and after-hours emergency locksmith response 24/7 throughout Greenville County.

Every service on that list is handled by our own trained and insured technicians driving fully stocked mobile units — no subcontracting, no dispatching someone who has to stop at a hardware store mid-job. That's what makes same-visit completion possible for the vast majority of calls we receive.