A1 SAN ANTONIO LOCKSMITHS
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Mortise Lock Repair & Replacement

San Antonio's older neighborhoods — from the craftsman bungalows lining King William Street to the early-twentieth-century homes tucked behind Brackenridge Park — were built in an era when a mortise lock was the standard for serious door security. Unlike the cylindrical locksets most people recognize today, a mortise lock is a complete mechanical assembly that sits inside a precisely routed pocket, or mortise, cut into the door's edge. It integrates the latch, deadbolt, strike plate, and often the handle escutcheon into one unified body, giving older doors both their distinctive look and their impressive holding strength.

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Open 24 hours, 7 days a week · Licensed, bonded & insured

When one of those aging lock bodies seizes up, a cylinder cracks, or a handle spindle strips out, the repair process is anything but a simple swap. A1 San Antonio Locksmiths sends trained, insured technicians directly to your door — no waiting for a shop appointment — so you get expert mortise lock repair and replacement service on your schedule, any hour of the day or night. We work with residential, commercial, and multi-unit properties across Bexar County, carrying a wide inventory of replacement parts and full lock sets so most jobs are completed in a single visit.

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 Do Older San Antonio Homes Still Have Them? — A1 San Antonio Locksmiths

What Is a Mortise Lock and Why Do Older San Antonio Homes Still Have Them?

A mortise lock is a self-contained unit composed of several moving parts — a latch bolt, a deadbolt or privacy bolt, a cam-actuated cylinder port, and often internal levers — all housed in a rectangular steel or brass case. Because the case recesses into the door stile rather than sitting on the surface, the hardware is naturally protected from brute-force attack. Manufacturers like Baldwin and Corbin Russwin built commercial-grade versions of this mechanism that have genuinely lasted fifty to a hundred years in heavy use, which is a large part of why they're still operating in so many San Antonio properties today.

The trade-off is that these assemblies are more complex to service than a modern cylindrical lock. Parts are not interchangeable across manufacturers, case dimensions vary by era, and the mortise pocket itself must remain structurally intact for the replacement to seat correctly. That precision is exactly why a trained locksmith — rather than a general handyman — is the right call when something goes wrong with these locks.

Our Mortise Lock Services: What We Carry and What We Do — A1 San Antonio Locksmiths

Common Mortise Lock Repair & Replacement Scenarios We Handle

The most frequent service call we receive involves a mortise lock cylinder that has worn to the point where the key turns but the bolt no longer throws, or one that has been damaged in an attempted break-in. Cylinder replacement is often possible without disturbing the main lock body: a skilled technician removes the set screw on the face of the case, extracts the old cylinder, and installs a new one keyed to your preference — including keying it to match other locks on the property if you want a unified key system. We also service sliding door mortise lock assemblies, which use a narrower case profile and a different cam orientation; these are common on older French-style patio doors in San Antonio's historic homes and require specific parts that not every shop stocks.

Beyond cylinders, we routinely address stripped spindle holes that cause handles to spin freely, broken internal springs that leave the latch permanently extended or retracted, cracked escutcheon plates, and full lock body failures where the case itself has corroded or fractured. When a full mortise lock set exterior door replacement is needed, we help you select a compatible unit — whether that means sourcing a period-appropriate Baldwin mortise lock set for a restored Victorian or a modern electric mortise lock for a commercial doorway that needs access-control integration. Smart mortise lock options are also available for homeowners who want keypad or app-based entry without sacrificing the door prep that's already in place.

Protecting Your Doors: When to Repair vs. Replace a Mortise Lock — A1 San Antonio Locksmiths

Our Mortise Lock Services: What We Carry and What We Do

A1 San Antonio Locksmiths offers a comprehensive range of mortise lock services across residential, commercial, and emergency locksmith calls throughout San Antonio and Bexar County. Our technicians arrive in fully stocked mobile units and can handle: mortise lock body removal and reinstallation, mortise lock cylinder extraction and replacement, rekeying mortise cylinders to a new key code, master-key system integration for multi-unit residential or commercial properties, Baldwin mortise lock set installation, Corbin Russwin mortise lock parts sourcing and fitting, antique mortise lock restoration and lubrication, full mortise lock set replacement on exterior doors, sliding door mortise lock repair and replacement, electric mortise lock wiring and mechanical installation, smart mortise lock conversion and setup, emergency lockout response when a mortise latch or bolt has failed, handle and lever set replacement on mortise escutcheons, spindle and rose repair, strike plate realignment and reinforcement, door edge mortise pocket assessment and repair coordination, multi-point locking system integration with mortise hardware, commercial mortise lock installation for office and retail doors, access-control-compatible electric strike pairing with existing mortise bodies, lock-body lubrication and preventive maintenance service, key duplication for legacy mortise keyways, damaged-key extraction from mortise cylinders, broken set-screw removal and replacement, mortise case spring and lever tune-up, and post-break-in security assessment and hardware upgrade. If a part is not on the truck, we source it quickly and return to complete the job — we do not leave a door unsecured in the meantime.

What Is a Mortise Lock and Why Do Older San Antonio Homes Still Have Them? — A1 San Antonio Locksmiths

Pricing, Verification, and Calling a Locksmith You Can Trust

One question we hear constantly is some version of 'How much does a locksmith charge for this?' The honest answer is that final cost depends on several factors: the specific lock brand and model, whether parts must be ordered, the complexity of the door prep, the time of day the call comes in, and travel distance within the San Antonio metro. What we commit to in every case is confirming an exact price before any work begins — no surprise charges appear on the invoice that weren't discussed upfront. A fair way to verify any locksmith is legitimate is to ask for their business name, confirm they arrive in a marked vehicle, check that they provide a written quote before starting, and make sure they ask you to prove ownership or residency before accessing a lock — these are the hallmarks of a professional, responsible operation. Our technicians carry identification and will always verify your right to access the property before proceeding; this protects you and ensures we're operating responsibly in communities like Alamo Heights, Stone Oak, Southtown, and across the rest of San Antonio. If you're dealing with a failed mortise lock right now, call (704) 850-6756 — we answer 24/7 and can dispatch a mobile technician to you immediately.

Our Mortise Lock Services: What We Carry and What We Do — A1 San Antonio Locksmiths

Protecting Your Doors: When to Repair vs. Replace a Mortise Lock

Not every worn mortise lock needs a full replacement. A cylinder that accepts a key smoothly but has minor wear on the cam is often rebuildable. A case with intact spring tension and a solid latch throw can usually accept a new cylinder and give many more years of service. However, a cracked case, a severely corroded body, or a lock that has been forced will have compromised internal tolerances that no amount of lubrication or partial repair will fix safely. Our technicians evaluate the full assembly on-site and give you an honest recommendation — repair when it makes sense, replace when it doesn't. For homeowners in San Antonio's historic districts, where preserving original hardware matters for aesthetic and sometimes regulatory reasons, we take extra care to exhaust repair options first and can often source period-compatible replacement parts that maintain the look of the original door. When a full mortise lock replacement is warranted, we handle the installation damage-free wherever the existing door prep allows, protecting the wood stile from unnecessary stress. Call (704) 850-6756 any time — our 24/7 mobile team is ready to diagnose and resolve your mortise lock issue today.

Frequently asked questions

What is a mortise lock, and how is it different from a standard door knob lock?

A mortise lock is a complete locking mechanism — including latch bolt, deadbolt, cylinder port, and internal levers — housed in a rectangular case that is set into a pocket (the mortise) cut into the door's edge. A standard door knob lock, by contrast, is a cylindrical assembly that sits through a bored hole in the door face and relies on a separate bolt mechanism. Mortise locks are generally more robust, more tamper-resistant, and more repairable, but they also require a skilled locksmith to service because their internal parts are brand-specific and precision-fit.

How much does a locksmith charge for mortise lock repair or replacement?

There is no single flat rate because several variables affect the final quote: the brand and age of the mortise lock, whether parts are in stock on the truck or need to be sourced, the type of service (cylinder swap vs. full body replacement), the time of day, and the distance our technician travels within the San Antonio area. What we guarantee is that you receive a confirmed, itemized price before any work begins — you never commit without knowing exactly what you're paying. Call (704) 850-6756 for a no-obligation assessment.

Can a locksmith make a new key from a mortise lock cylinder?

Yes. A skilled locksmith can decode a mortise lock cylinder either by disassembling it and reading the pin stack heights or, in many cases, by making a series of precision cuts using a key blank matched to the original keyway. This is useful when all copies of the original key have been lost. For legacy Corbin Russwin, Baldwin, and other older mortise keyways, our technicians carry a broad selection of key blanks specifically because these profiles are often unavailable at hardware stores. We can also rekey the cylinder entirely if you want to start with a fresh key code.

How do I know if a locksmith is legitimate before letting them work on my home?

A trustworthy locksmith will arrive in an identifiable vehicle, present their name and business information clearly, provide a written quote before starting any work, and ask you to verify your ownership or right to access the property before touching the lock. Be cautious of any technician who refuses to give a price upfront, dramatically increases the quoted amount after starting, or does not ask for proof of residency. Our technicians follow all of these practices on every call — identification is presented on arrival, pricing is confirmed before any tools come out, and ownership verification is always completed first.

What are the requirements to obtain a locksmith license in Texas, and why does it matter for hiring?

Texas requires locksmiths to register with the Texas Department of Licensing and Regulation, pass a background check, and meet training requirements before working in the field. When you hire a locksmith, you can ask for their TDLR registration number and verify it on the state's public database. This matters because it confirms the person accessing your locks has been vetted and is operating legally in San Antonio. Our team operates fully in compliance with Texas regulations, and our technicians are trained, experienced, and insured — you are protected both by their skills and by our business insurance.

Can you repair a sliding door mortise lock or an electric mortise lock, or only standard entry door hardware?

We service the full range of mortise lock types. Sliding door mortise lock assemblies are common on older patio and French doors throughout San Antonio and use a narrower case with a different cam orientation — our technicians carry the specific parts these require. Electric mortise lock units, which are used in commercial access-control systems and increasingly in upscale residential installations, involve both mechanical and low-voltage electrical components; our team handles both sides of that installation or repair. Smart mortise lock conversions are also available for homeowners who want app or keypad access while keeping their existing door preparation intact.

Locked out or need a lock fixed? We are on the way.

Open 24 hours, 7 days a week · Insured, background-checked technicians · Up-front pricing

(704) 850-6756