Master Key System in Locust Grove, NY

A master key system for a small office or a handful of rental units with one or two access tiers sits at the lower end of the $195 to $850+ range. A larger commercial property with multiple tenants, sub-master levels for different staff groups, and higher-security cylinders costs more because each tier adds cutting complexity and often new hardware.

When you call, the technician who calls you back will ask how many doors, how many people need which level of access, and whether you're starting fresh or rekeying an existing system, then quote a firm price for that scope before scheduling the visit.

Call the number and a dispatcher takes down the job and your callback number right away. The nearest available technician calls you back within a few minutes to talk through the door count and hierarchy and give you a price, and once you accept, the visit gets scheduled.

Locust Grove itself has no LIRR station, and the hamlet is now effectively part of the surrounding Syosset area, so technicians dispatched to properties here are already familiar with routing through this part of Oyster Bay rather than treating it as an unfamiliar stop.

Before the technician arrives, walk the property and count exterior and interior doors that need to be keyed, and decide roughly who should have master access versus limited access to specific doors or floors. If you're rekeying an existing master system, have any old keys or cylinder information on hand so the technician can confirm what's currently installed.

Having a property manager or someone with authority to approve the final hierarchy available during the visit keeps the installation from stalling on a decision that has to wait for someone else.