Mortise Lock Repair & Replacement
San Antonio's older homes — from the limestone cottages near King William Historic District to the early-20th-century craftsman bungalows lining Monticello Park — were built with a different standard of door hardware. The mortise lock was the workhorse of that era: a heavy-duty, multi-component lock body that sits inside a carved-out pocket (the "mortise") in the door edge rather than on the surface. When one of these locks starts binding, the latch stops retracting, or the cylinder turns but nothing catches, you need a locksmith who actually understands the mechanism — not someone who treats every door like it carries a modern cylindrical lock.
Open 24 hours, 7 days a week · Licensed, bonded & insured
San Antonio Locksmiths Pro specializes in mortise lock repair and replacement on residential and commercial properties across the San Antonio area. Our trained, insured technicians arrive fully equipped, mobile and ready to work on your doorstep — no tow, no shop drop-off, no waiting days for a hardware-store order. Whether your 1920s front door still carries an original Corbin Russwin mortise lock set or you're upgrading to a modern Baldwin mortise lock with updated cylinder tolerances, we diagnose the problem first, confirm an exact up-front price before touching anything, and get the door functioning properly — with as little damage to your historic door as possible.
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 San Antonio, we reach the San Antonio 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.
What Is a Mortise Lock and Why Older San Antonio Homes Rely on Them
A mortise lock is a complete lock assembly — latch bolt, deadbolt, strike, and cylinder — housed inside a single metal case that recesses into the door's edge. Unlike a bore-through cylindrical lock (the standard on most doors built after the 1960s), a mortise lock set distributes stress across a much larger surface area of the door stile, making it significantly harder to kick or pry. That engineering advantage is exactly why historic-district inspectors in areas like Beacon Hill and Monte Vista often encourage homeowners to restore original hardware rather than replace it with modern bore-through hardware that requires cutting new holes. The downside is that mortise lock bodies contain a dozen or more individual moving parts — cams, levers, springs, and hubs — and a single worn spring or stripped cam can render the entire assembly non-functional.
Understanding what is a mortise lock also means understanding its vulnerability points. The mortise lock cylinder (the plug that your key turns) is a separate component from the lock body, which is actually an advantage: a compromised or worn cylinder can often be re-keyed or swapped without touching the main case. The lever trim, spindle, and hub are the next most common failure points on high-traffic doors. On exterior doors, moisture infiltration around the pocket — particularly common in San Antonio's humid summers — can cause internal springs to rust and seize. Our technicians carry both the diagnostic tools and the replacement parts inventory to address these failures on the spot.
Mortise Lock Repair: What Our Technicians Actually Do On-Site
A mortise lock repair call is never one-size-fits-all. When one of our mobile locksmiths arrives at your property, the first step is a hands-on assessment: we remove the trim roses and lever handles to expose the face plate, then remove the case to examine the internal mechanism under proper lighting. Common findings include sheared cam tails (the tab that transfers cylinder rotation to the lock body), collapsed or missing case springs, worn hub inserts that let the lever spin freely without engaging the latch, and corroded bolt mechanisms that no longer travel their full throw. Each of these conditions has a specific repair path, and we walk you through exactly what we find before any work begins.
For doors carrying a Corbin Russwin mortise lock — a brand widely installed in San Antonio commercial buildings and multi-family housing through the mid-20th century — we carry compatible case springs, cams, and cylinder tailpieces that allow in-place repair rather than a full case swap. Baldwin mortise lock sets, frequently found on higher-end residential properties, have their own hub geometry and cylinder format. We stock parts and replacement cases for both product lines, as well as generic mortise bodies that meet or exceed the original specifications when an exact-match part is unavailable. Every repair is followed by a full cycle test: latch, deadbolt, lever, and thumb-turn — both from inside and outside — before we re-install trim and call the job complete.
Mortise Lock Replacement and Upgrade Options — Including Smart and Electric Mortise Lock Conversions
Sometimes repair isn't the right answer. If the original case is cracked, the pocket in the door stile has been stripped by previous forced entry, or the homeowner simply wants modern functionality, a full mortise lock replacement is the better investment. Our technicians measure the existing pocket dimensions precisely — pocket height, width, backset, and hub height — before sourcing a replacement case, because a mismatched case on a historic door often means expensive woodwork modifications. We prioritize cases that drop into the existing pocket without enlarging it, preserving the door's structural integrity and any period millwork.
Homeowners and commercial property managers increasingly ask about smart mortise lock options and electric mortise lock conversions for access-controlled doors. A smart mortise lock replaces the cylinder and sometimes the full case with a unit that accepts PIN codes, key fobs, or smartphone credentials while maintaining the same mortise pocket footprint. An electric mortise lock goes further — it integrates a motor-driven bolt that can be triggered by an access control panel, doorbell system, or remote buzzer, a common upgrade for multi-tenant buildings and small offices along corridors like Broadway or Fredericksburg Road. We assess whether your existing door framing and wiring support the conversion before recommending a product, and we handle the full installation. If you have a sliding door mortise lock that needs replacement — common on older commercial storefronts with aluminum-frame sliding glass doors — we carry the appropriate narrow-stile mortise cases designed for that application. Call (210) 401-5519 any time, day or night — our team answers 24/7.
Is There a 24-Hour Locksmith in San Antonio for Mortise Lock Emergencies? What to Ask Before You Hire
Yes — San Antonio Locksmiths Pro operates around the clock, every day of the year. A mortise lock failure on an exterior door isn't a problem you can safely defer until Monday morning, and we treat after-hours mortise lock repair calls with the same thoroughness as daytime appointments. Our mobile technicians cover the full San Antonio metro — from the Far West Side near Loop 1604 to Southtown, from Stone Oak to the near East Side — so travel time stays reasonable regardless of where your property sits.
What should I ask a locksmith before hiring? A few questions matter most: Are your technicians trained and insured? (Ours are, and we carry insurance on every job.) Will you confirm the price before starting work? (We always provide an exact up-front quote — no surprise additions at the end.) Do you carry parts for older mortise lock sets on your truck? (We do — it's what separates a specialist from a general-purpose locksmith.) Regarding locksmith service pricing in San Antonio: the final quote on any mortise lock job reflects several factors — the complexity of the lock mechanism, whether parts must be sourced versus pulled from our truck inventory, the time of day, and travel distance to your address. Emergency after-hours calls carry a different rate structure than scheduled daytime work, and we explain that clearly before any work begins. There are no hidden fees and no vague estimates. What locks can locksmiths not open? Professionally trained locksmiths can service the vast majority of mortise lock sets encountered in residential and commercial settings; highly specialized high-security cores or certain proprietary electronic systems may require a manufacturer service call, and we will tell you honestly if that applies to your situation rather than attempt a repair we cannot properly complete. For all other mortise lock needs — repair, replacement, re-key, or upgrade — call (210) 401-5519 and we'll dispatch a technician to your door.
Our Full Range of Mortise Lock and Related Door Hardware Services
San Antonio Locksmiths Pro provides a comprehensive set of locksmith services that extend well beyond mortise lock work. Our technicians handle: mortise lock body repair on residential entry doors; mortise lock case replacement in historic properties; mortise lock cylinder re-keying and replacement; Baldwin mortise lock installation and adjustment; Corbin Russwin mortise lock parts repair; smart mortise lock installation and programming; electric mortise lock wiring and installation; sliding door mortise lock replacement; mortise lock set exterior door full replacement with pocket preservation; door knob lock repair and replacement; emergency locksmith response for interior and exterior lockouts; home lockout assistance with ownership verification; business lockout and commercial locksmith response; deadbolt installation and re-keying; high-security deadbolt upgrades; master key system design and installation; access control system integration; panic bar and exit device installation; lock re-keying after a move or tenant change; car lockout and automotive locksmith service for cars, trucks, and motorcycles; transponder key programming; ignition repair and replacement; broken key extraction from locks and ignitions; safe opening and combination changes; padlock cutting and replacement; door frame and strike plate reinforcement; window lock installation; mailbox lock replacement; and locked-out-of-car assistance including child-locked-in-car emergency response. Every service is performed by trained, insured mobile technicians who come to your location — no shop required.
Our automotive locksmith services cover the full range of vehicle types across San Antonio — if you find yourself locked out of your car on I-10, stranded with a broken ignition near the Pearl District, or dealing with a child locked in a car in a parking lot off Military Drive, call (210) 401-5519 immediately and we dispatch the nearest available technician. For home or business lockouts, the same 24/7 response applies: we verify ownership, assess the situation, and use non-destructive entry techniques wherever the lock condition permits — then recommend a repair or hardware upgrade if the incident exposed a vulnerability in your door security.
Frequently asked questions
What are the typical prices for locksmith services in San Antonio, and how is a mortise lock job quoted?+
There is no single flat rate because several variables shape the final cost of any mortise lock service: the type and age of the lock mechanism, whether replacement parts need to be sourced or are already on the truck, the time of day (after-hours and emergency calls are priced differently from scheduled daytime appointments), and the travel distance to your address. San Antonio Locksmiths Pro always confirms a firm, itemized price with you before any work begins — what you approve is what you pay, with nothing added after the fact.
How much does an emergency locksmith cost for a mortise lock failure at night?+
Emergency and after-hours calls carry a different rate than standard daytime appointments, and the complexity of the mortise lock problem — a simple cylinder swap versus a full internal case repair — also affects the quote. Rather than publishing figures that may not reflect your specific situation, we assess the job when we arrive and give you an exact price before we start. You are never obligated to proceed until you have approved that number. Call (210) 401-5519 any time and we will give you the clearest picture possible over the phone as well.
What should I ask a locksmith before hiring them to work on an older mortise lock set?+
Ask whether their technicians are trained and insured — ours are both. Ask whether they carry mortise-specific parts on their service vehicle, because a technician without the right cams, springs, or cylinder tailpieces will leave the job incomplete or will charge extra for a return trip. Ask whether they will confirm price before starting work — we always do. And ask whether they have experience with the specific brand on your door, whether that is a Corbin Russwin mortise lock, a Baldwin mortise lock, or an older no-name case common on San Antonio properties built before World War II.
What locks can locksmiths not open?+
A trained locksmith can service or open the vast majority of mortise lock sets found in residential and commercial properties, including older and high-security models. The exceptions are narrow: some proprietary high-security cores with manufacturer-controlled key control, certain biometric or encrypted electronic locks that require factory service tools, and safes with unusual or damaged mechanisms that fall outside standard locksmith tooling. In those cases, an honest locksmith will tell you upfront rather than attempt a procedure that could damage the lock further. San Antonio Locksmiths Pro will always give you a straight answer about what we can and cannot address before any work begins.
Can you replace a mortise lock on a historic door without enlarging the original pocket?+
In most cases, yes. Our technicians measure the existing mortise pocket — height, width, backset, and hub height — and source a replacement case engineered to fit within those dimensions. This is particularly important for properties in San Antonio's historic districts, where maintaining the original door stile prevents both cosmetic damage and compliance issues. If the pocket dimensions are non-standard and a larger case is genuinely necessary, we explain the woodworking implications and the options before proceeding. Damage-free or minimal-impact service is always the goal.
Is there a 24-hour locksmith in San Antonio who handles both residential mortise locks and car lockouts?+
San Antonio Locksmiths Pro operates 24 hours a day, seven days a week, covering the full San Antonio metro area. Our mobile technicians are equipped for both residential and commercial mortise lock repair and replacement as well as the full range of automotive locksmith services — lockouts, transponder key programming, ignition repair, and more. Whether you are dealing with a seized mortise lock on your front door at 2 a.m. or a car lockout in the parking lot of the Shops at La Cantera, one call to (210) 401-5519 reaches a real dispatcher who will get someone to you.