Master Key System in Old Westbury, NY

Cost scales with door count and how many tiers you need in the hierarchy, not the size of the lot itself: $195 to $850+ covers everything from a simple two-tier setup on a single residence to a full system across a main house, guest house, and outbuildings. Old Westbury's one- to four-acre zoning means many properties have a primary residence plus detached structures such as garages, pool houses, or staff quarters, each adding doors to plan for.

Tell the technician on the callback how many buildings and doors are involved so the quote matches the job before anyone drives out.

Old Westbury is car-dependent with no LIRR station in the village, and many homes sit behind gates at the end of long private driveways set well back from Glen Cove Road, Wheatley Road, or Jericho Turnpike. The dispatcher takes your job and number, and the nearest local technician calls back within a few minutes to quote a price and confirm access details, arriving in about 15 to 30 minutes once scheduled.

Have the gate code or a way to let the technician in ready before the visit, since a locked entry gate adds delay a house door never would.

Before the callback, walk the property and count exterior and interior doors that need keying, note which should share a common key and which need to stay restricted, and decide if you want new cylinders throughout or a re-key of existing hardware. If the property spans structures on both sides of the North Hempstead and Oyster Bay town line, mention that too, since it can affect what's already installed.

The technician uses these details to quote a real price on the callback, before the hierarchy gets designed or any door is touched.