The Transitional Social Housing Action Project covered three sites with varying physical and socio-economic environment, i.e. a temporary work site at the intersection of Tung Chau Street and Yen Chow Street West in Sham Shui Po, the former SKH Stanley Village Primary School in Stanley, and the Ma Wan Old Village. The Report provides a comprehensive documentation of the cross-sector and trans-disciplinary co-creation process which has contributed to enriching the knowledge in the planning, designing and implementing transitional social housing projects in Hong Kong.