Door Knob & Deadbolt Installation

Installing a door knob lock sounds straightforward until you are standing in front of a pre-hung door with the wrong bore diameter, a steel frame with no strike reinforcement, or a door slab that has swelled in South Texas humidity. Our technicians measure the cross bore and edge bore, confirm the correct backset — typically 2-3/8 or 2-3/4 inches — and make sure the latch bolt and deadbolt are both plumb before a single screw is tightened. On older San Antonio homes with solid wood doors, we also inspect the mortise pocket if the door was previously fitted with a mortise lock, patching or adapting as needed so the new hardware seats flush and operates without binding.

Deadbolt installation goes hand-in-hand with door knob replacement on most exterior doors. A knob lock alone is not enough — the latch bolt can be defeated with a credit card on a non-deadlocking design. We install single-cylinder or double-cylinder deadbolts, align the bolt to throw cleanly into a reinforced strike plate, and test the full cycle multiple times before calling the job complete. For doors that see heavy traffic — think a San Antonio restaurant on the River Walk corridor or a retail shop near North Star Mall — we also discuss whether a mortise lock system would offer better long-term durability than a cylindrical setup.

A mortise lock is a pocket-style unit that recesses entirely into the door edge, combining a latch, a deadbolt, and sometimes a privacy or passage function in a single robust body. It is the standard on most commercial entry doors and on premium residential applications. Because the lock body is embedded in the door rather than surface-mounted, mortise locks distribute force across a much wider footprint — making them significantly harder to defeat through kick-in attacks. Our commercial locksmith work regularly covers mortise lock installation on office suites, medical offices, and multi-tenant properties across San Antonio's downtown and medical center corridors.

Adjusting an existing mortise lock — or converting a door from a cylindrical knob-and-deadbolt setup to a mortise system — requires precise chiseling of the door edge, correct sizing of the faceplate, and accurate placement of the strike. This is work where measurement errors translate directly into a lock that binds, a door that will not close fully, or hardware that looks crooked on a finished door. Our technicians carry the chisels, hole saws, and door-edge jigs to handle this properly on-site, and we work damage-free wherever the door condition and hardware allow.

Homeowners and property managers throughout San Antonio are increasingly asking about smart lock door knob replacements and keypad lock door knob installations — and for good reason. Eliminating physical keys reduces lockout risk, makes it easy to grant temporary access to a contractor or short-term guest, and gives you an audit trail of who came and went. We install Wi-Fi and Bluetooth-enabled smart locks, keypad-entry deadbolts, and combination knob-and-keypad units on standard prep doors as well as on doors that need minor boring modifications to accept the new hardware.

A double lock door knob — meaning a knob set that includes both a latch lock and a keyed deadlocking mechanism in a single unit — is another option we see requested often for interior commercial doors and back-office entries where a full separate deadbolt is impractical. We help you choose the right configuration for your specific door, then handle the installation so it functions exactly as designed. If you are unsure what hardware type fits your situation, call (210) 390-5404 and one of our team members will walk you through the options before we ever show up at your door.

If you are locked out of your home or business, the correct first step is always to check for a spare key with a trusted neighbor or family member, or to see whether another entrance — a back door, a garage, a sliding door — is accessible. If none of those options are available and you need entry to your own property, call a professional. Our emergency locksmith response covers all of San Antonio and surrounding communities 24/7, and our technicians will verify ownership before any work begins — that is a standard part of our process, not an inconvenience.

Beyond lockouts, there are several situations that signal it is time to call for a door knob lock service or adjustment: a latch that requires the door to be lifted slightly to engage, a deadbolt that feels gritty or stiff mid-throw, visible daylight around a strike plate gap, or a knob that wobbles even after tightening the set screws. These are not cosmetic issues — they are mechanical failures in progress. A misaligned strike or worn cylinder can mean the difference between a door that holds and one that yields on the first hard push. Our team diagnoses and corrects these issues on-site, and we confirm an exact up-front price before any work begins. Factors that shape that price include the lock type and grade, the parts required, travel distance to your location, and the time of day. Call (210) 390-5404 — we answer 24/7.

Syan San Antonio Locksmith is a fully mobile operation, which means the same team that handles a mortise lock install on a downtown office also responds to a car lockout at a parking garage off Loop 410, a child locked in a car at a San Antonio HEB parking lot, or a motorcycle key issue near the AT&T Center. For automotive situations involving a child or pet locked inside a vehicle — especially in San Antonio's intense summer heat — treat it as an emergency and call 911 first, then call us. We arrive fast and work quickly, but a running engine and rising interior temperatures demand immediate emergency response as the first priority.

Our automotive locksmith work covers cars, trucks, SUVs, and motorcycles, including modern high-security transponder key systems and push-button ignition fobs. We also handle home lockouts, business lockouts, rekeying, master key systems, and access control — making us the single point of contact for virtually any lock or key need across San Antonio. Every call is answered by a live team member, every quote is given up front, and every technician who shows up is trained, insured, and arrives with the tools to do the job right the first time.