Located in the heart of historic downtown Santa Rosa, the iconic Upton Building at 401 Mendocino Ave / 555 5th St offers a variety of professional office suites for lease ranging from approximately 150 SF to 3,000 SF. Built in 1913, this character-rich building blends historic charm with flexible workspace options ideal for a wide range of businesses including creative agencies, architects, attorneys, therapists, financial planners, wellness professionals, beauty services, and more. Available spaces include private offices, collaborative suites, and larger multi-office configurations, with select suites featuring conference rooms, kitchenettes, and street frontage. The building offers flexible lease terms and opportunities for tenant improvements or custom build-outs to suit your business needs. Property Features: Suites ranging from ±150 SF to ±3,000 SF Historic downtown Santa Rosa location Flexible office layouts and lease terms Utilities and janitorial services included Shared restroom facilities Conference rooms and kitchen areas in select suites Street access and strong visibility for select spaces Walkable to restaurants, coffee shops, courthouse, and downtown amenities Whether you are a solo professional seeking a private office or a growing company looking for a larger headquarters space, the Upton Building offers flexible options in one of Santa Rosa’s most recognizable historic properties. For leasing information or to schedule a tour, please contact: Califa Witsch Luxe Places International Realty 707-321-5052 califawitsch@gmail.com