The Cullinan is a luxury private housing estate located in the Union Square, West Kowloon, Hong Kong.

The glass facade matches the design language of the neighbouring International Commerce Centre.

The Cullinan complex was proposed at only 45 storeys up until the cancellation of Union Square Phase 5.

After Phase 5 was dropped, the Cullinan Towers were proposed at the current 93 floors instead.

[1] The penthouse apartment units are located on the top floors of the building.