Master Key System in North New Hyde Park, NY

A single-tenant office with 6 to 8 doors on one level sits toward the low end of $195 to $850+. Cost climbs with door count, with the number of access tiers (grandmaster over building managers over individual unit keys, for example), and with cylinder type if you want restricted or patented keyways that can't be duplicated at a hardware store.

Postwar buildings in this area, along with the mixed housing stock from Floral Park Centre through Lakeville Estates, often mean a range of lock ages and brands on one property, which the technician needs to account for in the hierarchy plan, not just the door count.

Call the number and a dispatcher takes down the property type and door count, then the nearest available technician calls back within a few minutes to talk through the hierarchy and quote a price before scheduling anything. For a job on Hillside Avenue or off New Hyde Park Road, expect arrival in 15 to 30 minutes for the initial site walkthrough; multi-door commercial work is scheduled once the technician has actually seen the doors, since master key quotes depend on what's already installed.

Have a door count and a rough sense of how many access tiers you want (owner, manager, staff, tenant) before the callback, since that's what the technician needs to quote a hierarchy instead of a single lock. If any cylinders are already keyed to an existing system, note the brand or bring a sample key so the technician can tell you whether it can be folded into the new hierarchy or needs full replacement.

Building access matters too: if it's a managed property, let the front desk or super know a locksmith is expected so the technician isn't held up getting to the doors.