Mortise lock replacement & repair
Mortise locks are on countless NYC apartment and commercial doors. We replace, repair and upgrade them, including high-security cylinders.
- Apartment and commercial mortise locks
- Cylinder swaps and high-security upgrades
- Repairs when replacement isn't needed
The NYC door lock
A mortise lock sits in a pocket cut into the edge of the door, combining a latch and deadbolt in one heavy-duty body. They're built to last decades, but parts wear, springs break and cylinders get compromised.
Many mortise problems can be fixed without replacing the whole lock. When replacement is the right call, we match the size and backset so it fits the existing pocket without major door work.
Mortise lock services
Full replacement
New mortise lock bodies matched to your existing door pocket.
Repair
Broken springs, sticking latches and worn parts.
Cylinder replacement
New or high-security cylinders in your existing lock.
Rekeying
New keys, same lock.
Trim and handles
Levers, knobs and escutcheons.
Commercial grade
Heavy-duty mortise locks for high-traffic doors.
How a mortise locks job goes
Diagnose
Often a spring, lever or cylinder, not the whole lock.
Repair or match
We fix what can be fixed or match a replacement to the existing pocket.
Cylinder upgrade
Optional high-security cylinder while the lock is open.
Mortise Locks FAQ
Related services
Can a broken mortise lock be repaired?
Often, yes. Springs, levers and some internal parts can be replaced. If the body is badly worn, replacement is more reliable.
Will a new mortise lock fit my door?
We match dimensions to your existing pocket whenever possible so no major cutting is needed.
Can I put a Medeco or Mul-T-Lock cylinder in my mortise lock?
In most cases, yes. It's one of the most cost-effective security upgrades for an apartment door.
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"Excellent customer service, quick turn around, local and professional locksmith. Highly recommend for both residential and commercial work."