Master Key System in Muttontown, NY

A basic master key setup for a small number of doors starts around $195, while a full hierarchy across a large estate property, a multi-building compound, or a commercial building with several access tiers can run $850 or more. The variables are the number of doors, how many levels of access you need (owner, staff, groundskeeper, tenant), and whether existing locks can be rekeyed into the new system or need replacing.

On Muttontown's estate properties, a technician usually asks upfront how many structures on the property need separate keying, since a main house, guest house, and stable each add a branch to the hierarchy and change the total door count.

Muttontown is car-dependent with no LIRR station, and properties here tend to sit on large, gated, or long-driveway lots reached mainly off NY 106 (Jericho-Oyster Bay Road) or NY 25A (Northern Boulevard). When you call, a dispatcher logs the job and your number, and the nearest available technician calls back within a few minutes to go over the property layout and quote a price before anyone drives out.

For master key work specifically, that callback is a good time to describe the property so the technician arrives with enough hardware and doesn't have to make a second trip. Typical arrival for a first walkthrough is 15 to 30 minutes.

Have a rough door count ready, including any detached buildings like garages, guest houses, or stables common on Muttontown's larger lots, and a sense of who needs which level of access (owner, family, staff, contractors). If you're a property manager rather than the owner, confirm you're authorized to order new keying for the building.

Existing keys or lock brands on site help the technician decide faster whether locks can be rekeyed into the new hierarchy or need to be swapped for compatible hardware.