The main building of St. Paul's Co-educational College ("The school") was built in 1927. An annex building of classroom and assembly hall was completed in 1959. In 1985 a 7 storey annex building was built to enhance the teaching facilities.
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The A&A project at St. Paul’s Co-educational College involves revitalization of the grade 2 historic building with emphasis placed on the School’s long history. The project also involves a re-construction of the school hall to highlight our rich musical tradition. Other major renovations included the construction of the new library, reconstruction of the main entrance, renovation of classrooms and corridors, and construction of a new lift shaft.