Master Key Systems
Downtown Doors & Security designs and installs master key systems across Brooklyn and Manhattan — so building management or ownership carries one key that opens every door, while each tenant, office, or area keeps its own key. We set up the access hierarchy for multi-unit residential, commercial, and mixed-use buildings.
A master key system organizes access: a master key opens many doors, sub-master keys open a floor or wing, and each door keeps its own change key. It replaces a ring of dozens of keys with a clean, controlled hierarchy.
We design and pin master key systems for apartment buildings, offices, and commercial properties, plan the access tiers, and rekey or install the cylinders — with a key schedule so you know exactly which key opens what.
When you need it
- Management or staff needs one key for many doors
- You're tired of carrying a ring of individual keys
- You need clear access tiers by floor, wing, or role
- Staff or tenant turnover means you need controlled rekeying
- You're setting up a new building's key system from scratch
How it works
- 1
Map the access hierarchy
We work out who should open which doors and design the master, sub-master, and change-key structure to match.
- 2
Pin & install cylinders
We rekey or install the cylinders to the system and cut the keys per the schedule.
- 3
Deliver the key schedule
We hand over a clear key schedule so you always know which key opens what, and can control future copies.
How pricing works
Every master key systems job is priced after a free on-site assessment — no guesswork and no surprises. We diagnose the real issue, explain your options in plain language, and give you clear pricing before any work begins.
Frequently asked
Can one key open every door in my building?
Yes — that's exactly what a master key system does. Management carries a master that opens every door, while each unit or office keeps its own key that only opens theirs.
Can you control who's able to copy keys?
Yes. We can set up restricted or patented keyways so keys can't be duplicated at a hardware store, and provide a key schedule to track issued keys.
Need it handled today?
Call for same-day service across Brooklyn and Manhattan, or send a few details and we'll get right back to you.