OS Arch

Doug OsbornS. Douglas Osborn AIA – Principal Architect

1988 Bachelor of Architecture
Cal Poly State University, San Luis Obispo
CA Licensed Architect since 1996-#C-25412
American Institute of Architects
Certified Passive House™ Consultant
23 years of professional work experience


Doug was raised in the Central Valley of California in the small town of Clovis. The rhythm of agricultural life permeated the local culture, and he internalized a connection to the land and growing seasons.

Prior to his acceptance into the School of Architecture and Environmental Design at California Polytechnic University in San Luis Obispo, Doug worked in construction where he learned, first-hand, how buildings are built. His desire to understand how the built form can be designed to enhance our lives led him to a career in architecture.

While studying at Cal Poly, Doug developed an interest in sustainable architecture, and continues to seek ways to implement those principles into his work. In 2009 he received training in the Passive House™ performance standard and was among the first group qualified to receive certification in California. He sees the current awareness of conservation principles as an opportunity to demonstrate his skills in integrating them into his design work.

Doug honed his winery and cave design talents in his sixteen year tenure as principal architect at Lail Design Group in St. Helena, California. In the spring of 2011, he teamed up with his long-time associate Dave Siegert AIA, to form a new practice, Osborn Siegert Architecture [os-arch]. Together they continue to focus their attention on creating winery and estate architecture with customized functionality and site specific character.

Selected Projects

Castello di Amorosa Winery

Hartwell Winery

Laird Family Estate

Vineyard 29 Winery

McMinn Residence

Hall Winery Phase II

Arkenstone Winery

Folie a Deaux Winery

Pine Ridge Winery

Checkerboard Winery

Schramsberg Riddling

Swanson Winery UP

J. Davies Winery

555 Main Street