The 150-year-old building was sold for an undisclosed sum to Grand Hotel Excelsior International, who will convert the listed building into a luxury hotel.
Proceeds from the sale have been split between the NMRN and the Royal Navy, and the Royal Navy agreed to assist the National Museum in moving and storing its collection of paintings, weapons, personal effects, uniform and kit to a storehouse.
The museum was part of the National Museum of the Royal Navy (NMRN), and was housed in the former officers’ mess on the Eastney Barracks site from the early 1970s.
It closed in 2017, however, when the museum deemed that the building was “no longer suitable”.
In its place, plans were unveiled to convert the Action Stations building in the historic dockyard into an attraction which “tells the Corps’ outstanding story to a 21st-Century audience”.