Special attention have been given to ventilating the rooms, each house was provided with electric lights, fans, bells, modern sanitary fittings and was connected to the water-carriage system.

According to a letter dated 19 June 1947, the Ministry of Agriculture and Lands temporarily handed over the dwelling, then known as the Captain's House, to the then Commander of the Ceylon Garrison Force.

Brigadier James Roderick Sinclair, the Earl of Caithness, was appointed the first Commander of the Ceylon Army in 1949 and played a major role in establishing it as a regular army from the volunteer Ceylon Defence Force till 1952.

From the time of the Earl of Caithness, this became the official residence of the Commander of the Army with a short interruption when the Attorney General moved in there between Brigadier Sir Francis Reid’s departure in 1955 and Brigadier Muttukumaru’s return in January 1956.

A ceremonial guard is mounted at the gates of the house when the commander is present in Colombo during day time.