Kowloon network of sky slums are barnacled onto roofs of tenements built in '60s , 60s . Mostly found in old urban areas in Kowloon -- Sham Shui Po , Sham Shui Po and Tai Kok Tsui . Contrasts with luxury apartments that can often fetch up to US $ 12.85 million . The only difference is that as an unprepossessing corrugated iron shack that forms part of Hong Kong 's extensive network of sky slums -- technically illegal rooftop structures barnacled onto the roofs of tenements built in the 1950s and 60s -- the market is sluggish . Slums stem from housing crises of 1950s , 60s when waves of Chinese refugees arrived .
Kowloon network of sky slums are barnacled onto roofs of tenements built in '60s , 60s . Mostly found in old urban areas in Kowloon -- Sham Shui Po , Sham Shui Po and Tai Kok Tsui . Contrasts with luxury apartments that can often fetch up to US $ 12.85 million . Slums stem from housing crises of 1950s , 60s when waves of Chinese refugees arrived .