Tai Po Regional Crime HQ [1899- ]
Also known as the the Old Tai Po Police Station. The Govt's development website reads:
"The old Police Station is a single-storey building constructed in 1899 shortly after the British leased the New Territories. It was the first police station and Police Headquarters in the New Territories and was rated by the Antiquities Advisory Board as a Grade II historical building. The Government is now considering different options for the adaptive re-use of the building."
At the time of writing it is still fenced off but you can see the main buildings from outside the fence.