Master Key System in Malverne, NY

A single-tier system where one master opens every unit is the cheapest version of this job. Add a property manager tier that opens common areas and its own subset of units but not others, and the cylinder work and key-cutting logic both get more involved, which is why the range runs $195 to $850+.

Door count matters as much as tier count: a four-unit walk-up in Malverne prices very differently from a larger multi-tenant building. Tell the dispatcher how many doors and roughly how many access levels you need (owner, manager, tenant, maintenance) so the callback quote is close to the final number.

Malverne is compact, about a square mile, and largely reached by car rather than rail since its two LIRR stops (Malverne on Hempstead Avenue and Westwood on Foster Avenue) run the lightly-traveled West Hempstead Branch. That makes drive time predictable: a technician working nearby can usually reach a property off Hempstead Avenue or Ocean Avenue, or a building near the Southern State Parkway or Hempstead Turnpike, inside the standard 15 to 30 minute window once dispatch confirms the job.

For a master key install, have the building address and unit count ready when you call so dispatch sends someone equipped for the door count, not just a lockout van.

Before the technician calls back, know how many doors need keying, who needs which level of access, and whether any existing cylinders are already keyed to a system you want to preserve or replace outright. If you're a property manager, confirm with the owner whether they want a master that overrides your level too.

Having that structure sketched out, even roughly, turns the callback into a fast, accurate quote instead of a back-and-forth.