Costing £350,000 and ten years to build, the Cardiff City Asylum opened on 15 April 1908. The main hospital building covered 5 acres (2.0 ha), designed to accommodate 750 patients across 10 wards, 5 each for men and women. Like many Victorian institutes, it was designed as a self-contained institute, with its own 150 feet (46 m) water tower atop a power house containing two Belliss and Morcom steam engine powered electric generator sets, which were only removed from standby in the mid-1980s.
Whitchurch Hospital finally closed its doors in April, 2016 and is due to be stripped down and dismantled.