Master Key System in Oyster Bay Cove, NY

A master key system for a single building with a handful of doors sits at the low end of $195 to $850+. Estate properties in Oyster Bay Cove change that math fast: a main house, a guest cottage, and outbuildings each add a tier to the hierarchy, and every additional lock cylinder or sub-master level adds to the count.

Tell the technician up front how many separate structures and doors need to be keyed, including any gates or sheds, so the callback quote matches the actual job instead of being revised on site.

Oyster Bay Cove has no LIRR station and is entirely car-dependent, so every job is a driving job routed off NY 25A, Berry Hill Road, Cove Road, or Yellow Cote Road depending on where the property sits relative to Oyster Bay Harbor. Long private driveways and gated entries are common on these lots, so when the technician calls back, mention any gate codes, buzzer systems, or landmarks near your entrance.

That's what keeps the 15 to 30 minute window accurate instead of the technician circling a wooded lot looking for the driveway.

Walk the property first and count every exterior door, interior door you want on the hierarchy, and any existing keyed cylinders that need to match the new system. If you're a property manager rather than the owner, have written authorization ready, since master key work affects building-wide access and a technician will confirm you're authorized before cutting keys.

RC Locksmith Nassau County has handled key hierarchy work since 2009, and the dispatcher-to-technician callback means you get a firm price for your specific door count before committing to the job.