Charles F. Bloszies’ extension and renovation of Cathedral School for Boys in San Francisco

Local studio Office of Charles F. Bloszies has completed an extension and renovation of the Cathedral School for Boys in San Francisco.

The two-storey addition is part of the Cathedral Close, an entire city block in Nob Hill that includes the Grace Cathedral.

Completed in 2022 while the school was in use, the project includes a 4,000-square-foot (370-square metre) narrow addition and reworked 8,000 square feet (743-square metres) of academic classrooms.

The studio added a metal and glass extension to the school
The extension included the “careful inssertaion” of a modern, glass-lined structure between the cathedral and the school.

The addition is “a contemporary metal and glass structure that fits comfortably among the venerated landmark buildings it connects, capturing previously unavailable views of the cathedral and the city beyond” said the Office of Charles F. Bloszies.

The original ornate Gothic-style cathedral was completed in 1964; constructed a couple of years later, the restrained, concrete Cathedral School for Boys sits adjacent to the building’s apse.

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