The first is a booking office and when the station is staffed, a passenger waiting room, which also houses the control equipment for the adjacent level crossing.

The station is currently used largely by local residents and passengers alighting here for the sandy beach.

Also in St Mary's Bay, about a quarter of a mile further north down Dunstall Lane is the now-closed Golden Sands Halt railway station, formerly used by the Maddieson's Golden Sands holiday camp.

Since 1946 it has been known as "St Mary's Bay" apart from a period from the early 1980s until the end of 2000 when it was renamed "Jefferstone Lane".

A short distance south of St Mary's Bay station a signal box was originally erected to control movements in and out of sidings provided to serve Allnatt's holiday camp, and is marked as such on the title deeds for this part of the station site.

[1] The station was refurbished and repainted in 2009 by a small group of volunteers, helped by the railway's paid staff, with the aim of the station being opened on special events with small, but appropriate, photographic displays within the booking office.