The government came up with a proposal to build the North South Line Woodlands Extension in 1990 with the aim of extending the then existing North-South and East-West lines, thus connecting Choa Chu Kang in the west to Yishun in the north. Admiralty was one of the four stations in the initial proposal which was later expanded to six. Construction commenced in 1991 and the station was opened on 10 February 1996 along with the other five stations on the Woodlands Extension. Formerly named Woodlands East, it was however renamed to Admiralty in 1994. Further developments were built in the vicinity since 1994, with additional bus services connecting to the station.
Following numerous incidents of commuters falling on the tracks and unauthorized intrusions, the Land Transport Authority made the decision in 2008 to install half-height platform screen doors for all above-ground stations in phases. Installation started on 4 October 2011 and started operations since 22 December 2011 with Marsiling.