This paper delves into Hong Kong's vernacular spatial cultures and their role in shaping the city's identity. Through a careful architectural survey, the study uncovers unique vernacular spatial practices in Hong Kong, categorising them into eleven vernacular typologies at the district scale. These practices challenge the traditional top-down approach to city planning and design, offering valuable insights into how informal and vernacular practices can create more inclusive, sustainable, and resilient urban spaces. The paper contends that the conventional approach to architectural design has been limited by its focus on abstract interpretations of the city, and argues for a spatial structure that emphasises the empirical study of the physical elements and cultural habitation of the citizens. The urgency of this research lies in its potential to revolutionise urban space production, address social problems and needs, and provide a unique spatial identification for cities in Asia and beyond.