19six Architects

Architecture and PlanningCalifornia, United States51-200 Employees

19six Architects is an architecture and planning firm based in California, United States, employing 51-200 people. Founded in 1906, it is one of the oldest architectural firms in California, originally operating as a Santa Barbara local practice led by A.B. Higginson and later expanding to serve clients across the state. The firm, formerly known as PMSM Architecture, merged with Williams + Paddon in 2022. It offers a broad range of architectural and planning services, including programming and site planning, architectural building design, project management, construction documents and administration, LEED processing, and planning services such as facilities master planning and feasibility studies. In 2026, it announced a contract for the Carpinteria Community Pool Improvement Project to complete design and permitting and provide construction support, with a value not to exceed $275,000. The company serves sectors including K-12, higher education, healthcare, performing arts, civic, and master planning.

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