Inside a Berkeley Home Designed by Architect Willis Polk

As San Francisco’s Hobart Building—with its elaborate neoclassical facade clad in terracotta—neared completion in 1914, influential architect Willis Polk was commissioned for another project across the bay in the Berkeley Hills. Designed in 1915 for his longtime collaborator Trygve Ronneberg, a civil and structural engineer, the Mediterranean Revival residence reinforced a professional partnership that helped shape the region’s built environment. Ronneberg, Polk’s in-house…