OS Arch

Doug OsbornS. Douglas Osborn AIA – Principal Architect

S. 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


Doug was raised in the Central Valley of California in the small town of Clovis. The rhythm of agricultural life permeated the local culture giving him the opportunity to internalized the functional and aesthetic connections between the built environment and the land.

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

Aloft Winery, Use Permit

Arkenstone Winery

Archery Summit Winery

Castello di Amorosa Winery, Cave Addition & Farm Buildings

Checkerboard Winery

Cru at the Annex

Davies Vineyards Winery & Tasting Room

Far Niente Carriage House Addition

Hall Winery Fermentation & Barrel Storage

Hartwell Winery

Pine Ridge Winery

Laird Family Estate Winery

Pine Ridge Winery

Schramsberg Riddling

Vineyard 29 Winery