Zoroastrian Building (current generation) [1993- ]
As I understand it, this is an office building, but it is also the local temple for believers of Zoroastrianism.
Followers of this religion who come from the Indian subcontinent are called Parsee or Parsi.
Apart from the temple, the other obvious sign of this religion in Hong Kong is the Parsee cemetery in Happy Valley. It is well kept, with lots of flowers, and is worth a walk around if you are in the area.