Lock Installation & Re-Keying in NYC

Lock Installation & Replacement — Done Right the First Time

Whether you're moving into a new apartment, upgrading after a break-in, or adding a second deadbolt for peace of mind, ASK Locksmith installs the right lock for your door and situation. We carry stock on the truck — no waiting for parts to arrive.

Deadbolt Installation

New York City's Administrative Code (MDL §51-c) requires a minimum 1-inch throw deadbolt on apartment entry doors. We install code-compliant deadbolts for all door types — wood, steel, and hollow-core — and verify alignment and operation before we leave. Brands we install include Schlage, Yale, Kwikset, Mul-T-Lock, and Medeco.

High-Security Lock Upgrades

Standard deadbolts can be picked, bumped, or drilled by experienced intruders. Mul-T-Lock and Medeco cylinders resist all three attack methods through patented key control, anti-pick pins, and hardened steel components. We assess your door hardware and recommend the best upgrade for your security needs and budget.

Re-Keying

Re-keying changes the internal pin configuration of your existing cylinder so old keys no longer work — only new keys you hold. It's faster and less expensive than full lock replacement and the right choice when your hardware is in good condition. Common reasons: moving into a new residence, ending a tenancy, losing a key, or post-break-in security reset.

Mortise Lock Service

NYC's older buildings typically use mortise locks — a rectangular body that fits into a pocket in the door edge. We repair, rebuild, and replace mortise lock bodies and cylinders for all major brands, including Sargent, Corbin Russwin, and Falcon.