Santa Rosa’s DeTurk Round Barn: How Historic Materials Shaped a New Interior

By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.

A successful building conversion often depends on deciding which traces of the earlier use should remain visible. Santa Rosa’s DeTurk Round Barn is an unusually clear example. Its form is memorable from the street, but the rehabilitation story is equally interesting at the scale of a stair, a floorboard or an exposed wall.

The project shows how an agricultural building can acquire a civic role while keeping its material character legible. It also illustrates why a historic rehabilitation’s design history should be distinguished from the building’s current operating arrangements.

The round form belongs to an 1891 building

The National Register record identifies the De Turk Round Barn, its significant year of 1891 and architect Thomas J. Ludwig. It records the building’s National Register listing on April 21, 2004.

The recognition emphasizes architecture. In this case, the building’s unusual form is itself part of the historical resource, rather than merely a shell around an important event.

A round interior poses different spatial questions from an ordinary rectangular room. Approaches, circulation and the placement of new elements must respond to a geometry that is already strongly established.

The rehabilitation reused wood in visible new roles

TLCD Architecture’s project account describes the 2011 conversion from a building originally used for prized trotting horses to a flexible community space.

The architects remilled redwood from original structural elements for cladding on new stairs and the elevator. Reclaimed oak from shipping-container boxes became flooring, while existing interior wood walls were retouched and left exposed.

These decisions create continuity through materials without pretending that every component retains its original function. Wood can move to a different role and still contribute to the building’s character.

The project account also identifies practical additions: restrooms, a catering room and audiovisual equipment. The conversion depended on combining those services with the retained interior, rather than relying on appearance alone.

Accessibility was part of making the building usable

The City’s January 2011 accessibility newsletter describes new pathways and restrooms among the renovation work. Its account links preservation with the ability to accommodate public programs and events.

That connection is worth recognizing. A building can be valued for its historic construction while still needing changes that allow more people to use it.

For anyone interested in older architecture, the barn demonstrates how the quality of a conversion depends on the fit between the retained structure and the new uses placed inside it.

The barn and its surrounding park have separate roles

The City’s current DeTurk Park page states that the barn building is not available for reservations. That information should take precedence over older project descriptions advertising event use.

A May 7, 2026 City bulletin also records a request for proposals concerning a lease of the historic barn. The notice documents an effort to find a future arrangement; it does not establish that a particular new operator or use is already in place.

The distinction keeps an architectural story accurate as management changes. The completed rehabilitation remains part of the building’s history, while current availability belongs to a different timeline.

A landmark that helps explain the West End

The barn gives Santa Rosa’s West End a recognizable architectural anchor. Its continued presence makes the relationship between earlier working buildings and later neighborhood life visible.

Looking beyond the circular outline reveals a more detailed local story: old materials, modern circulation and practical services brought together to extend a building’s life. That is a useful perspective for understanding the variety of historic architecture within Santa Rosa.

Explore real estate and home for sale in Santa Rosa, or contact Diamond to discuss a location that fits your plans.

Sources checked October 28, 2026. Historical details are attributed to the linked primary records and site operators. Check the operator for current visiting arrangements.