Text partially excerpted from 'The District Handbook: A CORO Foundation Guide'

The Twin Peaks area did not have the proximity to downtown of Nob or Telegraph hills, and therefore it was essentially unoccupied until after World War II. The Laguna-Honda Hospital predates all other buildings in the area. It was originally placed there specifically because its isolation would protect the San Franciscans from the chronic diseases of the poor treated there. It was also close to Laguna Honda, a natural lake.

The Diamond Heights area was originally considered on maps as an extension of the Mission District street grid. During the 1950s, the area was one of the City's first redevelopment projects. Apartment complexes and single family dwellings were constructed with strict zoning which afforded maximum views.