CLP's 1961 Annual Report mentions completing a substation with housing for their "Chinese workmen" above on Nelson Street. Earliest mention of building worker housing above substations as a company policy was the 1960 annual report.
Tai O Substation, including office, employee quarters and store was completed in 1961 according to CLP annual report from that year. The current building is the original.
According to CLP's annual report from 1953, a substation was built on Ki Lung Street in 1953 that year. The current modernist building looks like it could be the original.
According to CLP's annual report from 1953, a substation was built on Cornwall Street in 1953 that year. Based on the stone walls, the building that still exists is likely the original.
Possibly late 50's (but definitely on maps by 1960) era art deco styled substation with curved balconies.
