Main building, with frontage on Brook Green, St Pauls Girls' School

The main building of St Paul's Girls' School, dating from 1904 to 1907, was designed by Gerald Horsley. It is constructed of red brick and stone, with a slate roof. The building is symmetrical in design. The central three-bay entrance block is three stories high, with two windows in each bay. A large segmental-headed window is located in the centre bay of the second floor, topped by a heavily ornamented segmental pediment. Flanking the central block are single-story three-window wings, each featuring a centrally placed sculptured panel beneath a segmental pediment. These wings are connected to the central block by lower, single-story sections with dormered mansards. The building incorporates substantial figurative carving throughout.