Mortise Lock Repair & Replacement

A mortise lock is a lock body that is set into a precisely routed pocket — the mortise — cut into the door's edge. Unlike a cylindrical bored lock (the standard knob or lever you find on most newer construction), a mortise lock integrates the latch bolt, deadbolt, and sometimes a privacy indicator into a single steel or cast-iron case. That integrated design is why they were the go-to choice for quality residential and commercial construction from roughly the 1880s through the mid-20th century. San Antonio's building boom during that era, fueled by railroad commerce and later military-base expansion, left a large stock of pre-war housing whose original doors still carry these locks. Many homeowners on the near-Eastside and in Dignowari still use the same hardware their grandparents installed.

The trade-off for that longevity is complexity. A mortise lock set contains more moving parts than a cylindrical lock — a tailpiece, a cam, multiple springs, a hub, and often a separate mortise lock cylinder that must be keyed independently. When wear accumulates or when San Antonio's heat cycles cause wooden door stiles to expand and contract year after year, individual components fail in ways that a simple knob lock never would. Recognizing the difference between a cylinder problem, a worn cam, a broken spring, or a door-alignment issue is where professional diagnosis saves homeowners from unnecessary full replacements.

Our mobile units carry parts and tools suited to the most frequent mortise lock failures we encounter in this city. Broken or worn cam followers cause the latch to feel sluggish or to stick mid-throw — a common complaint in homes near Lavaca where humidity off the San Antonio River accelerates internal wear. Stripped mortise lock cylinders are another frequent call: older cylinders develop play in the plug, making keys turn without actuating the cam. We can re-pin or replace the cylinder alone without disturbing the lock body, preserving the original case and the door's historic integrity wherever possible. Snapped keys inside the cylinder are handled with extraction tools rather than force — our damage-free approach protects both the cylinder and the surrounding door edge. We also respond to full lock failures where the case itself has cracked, the spindle has sheared, or a door has been forced and the mortise pocket is damaged. In those situations we assess whether a period-correct replacement case is the right call or whether the client's goals are better served by a modern upgrade.

For exterior door applications, a failing mortise lock set on an exterior door is a security emergency, not just an inconvenience. A deadbolt that no longer throws fully or a latch that won't seat leaves the home vulnerable. We treat those calls with the same urgency as a lockout — because in a real sense, they are one. If you're dealing with a door knob lock that has failed alongside the mortise body, we can address both in a single visit so you're not left with a partially secured entry. Call (210) 796-3922 — we answer 24/7 — and we'll dispatch a technician with the parts most likely needed based on what you describe over the phone.

Sometimes the mortise lock body itself is beyond cost-effective repair — the case is cracked, the internal springs are too corroded to restore, or the client wants to upgrade security or functionality entirely. Mortise lock replacement in an older San Antonio home requires more skill than swapping a modern cylindrical lock because the mortise pocket dimensions, the door backset, and the faceplate geometry must all be matched precisely. Installing a wrong-dimension case means refitting the mortise, which is irreversible work on a historic door. Our technicians measure the existing pocket before recommending any replacement case, and we source options that fit the existing prep whenever possible to avoid unnecessary wood modification.

When a full upgrade is the goal, clients often ask about Baldwin mortise lock sets for their exterior doors, particularly on higher-end historic renovations where hardware aesthetics matter as much as function. For commercial clients managing older downtown San Antonio office buildings or retail spaces, electric mortise lock bodies allow integration with access-control systems without cutting a new door prep. We also field a growing number of requests for smart mortise lock retrofits — motorized cylinders or smart lock adapters that fit the existing mortise case and allow smartphone or keypad access while preserving the door's original profile. For sliding door applications, a sliding door mortise lock replacement requires specific case profiles and hook-bolt configurations; our technicians carry the tooling to handle those alongside standard hinged-door work. Whatever direction you choose, we confirm an exact price up-front before any work begins — the final quote reflects factors including the lock hardware selected, travel distance to your location, the time of day, and whether additional parts beyond the primary lock body are needed.

A failed or jammed mortise lock doesn't wait for business hours, and neither do we. Our 24/7 emergency locksmith service covers the full San Antonio metro — from Stone Oak in the north to Southside neighborhoods below Loop 410 — with no after-hours surcharge surprises. If you're locked out of your car in a parking garage on Commerce Street at 2 a.m., or a child is locked in a car in a HEB parking lot, or your business front door won't open before the morning shift, one call to (210) 796-3922 connects you with a live dispatcher who routes the nearest available technician to you. We handle automotive locksmith calls for cars, trucks, and motorcycles across the San Antonio area, residential lockouts, and commercial locksmith emergencies including access-control failures and panic hardware issues.

Beyond emergency response, our mobile commercial locksmith capabilities include master key system setup, high-security lock installation, door-hardware consulting for multi-unit properties, and re-keying services after tenant turnover. On the residential side, we address everything from door knob lock replacements to full mortise lock repair and replacement on historic properties. Every technician arrives in a marked vehicle, carries identification, and verifies your ownership or authorization before beginning any work — because responsible, professional service means protecting our clients as much as their property. If you've ever wondered what locks a locksmith can and cannot open, or what you should ask a locksmith before hiring one, our team welcomes those questions on the call — transparency before arrival is part of how we operate.

We provide a comprehensive range of locksmith services across San Antonio and the surrounding area. Our services include: mortise lock repair on residential and historic doors; mortise lock replacement and case sizing for period-correct or modern hardware; mortise lock cylinder re-pinning and replacement; Baldwin mortise lock installation on exterior and interior doors; Corbin Russwin mortise lock service and parts sourcing; electric mortise lock installation for access-controlled commercial entries; smart mortise lock retrofit and programming; sliding door mortise lock replacement and adjustment; mortise lock set supply and fitting for exterior door applications; emergency residential lockout response 24/7; automotive lockout service for cars, trucks, and motorcycles; child-locked-in-vehicle emergency response; transponder key cutting and programming; high-security deadbolt installation (Medeco, Mul-T-Lock, Schlage B-series); cylindrical knob lock and lever set replacement; door knob lock re-key after move-in or tenant change; master key system design and implementation; commercial lock installation and replacement; panic bar and exit device installation and repair; access control system installation and service; door closer adjustment and replacement; gate lock installation; key duplication for standard and restricted keyways; safe opening and combination change; post-break-in lock repair and security assessment; padlock and hasp installation; intercom and keypad integration with existing door hardware.