Text on a black background that reads 'GALLAHER SIGNATURE CONSTRUCTION' with the word 'GSC' in large white letters.

WE BUILD THE VISION

Bill & Cindy Gallaher began building homes under the Gallaher Construction name in 1979, starting one home at a time. For many years, Bill personally designed the floor plans and oversaw the construction of each home, gaining extensive, hands-on experience that shaped his deep understanding of the building process. Over time, their work expanded to include a wide range of projects beyond single-family homes.

GSC Construction emerged as the evolution of Gallaher and OSL Construction and now serves as the construction division of Gallaher Companies. As the company’s longest-standing business unit, GSC is led by Construction Director Wade Thompson and a skilled team of superintendents. Together, they manage and build diverse projects—including senior living communities, multi family developments, shopping centers, and single-family homes—across the western United States.

GSC Leadership

Our Superintendents and support team is led by our Director of Construction, Wade Thompson out of our Sonoma County headquarters. With a focus and commitment to high quality construction, Wade and his team churn out projects throughout the Western States exclusively for Gallaher Companies.

A man in a black suit, white shirt, and green tie smiling against a plain yellow background.

Wade Thompson

Portrait of a smiling man with short dark hair, wearing a blue button-up shirt, standing against a plain, muted green background.

Jacob Marovich

Contact us.

Email
707-535-3200

9240 Old Redwood Hwy.
Windsor, CA 95492