Concept to creation,
we do it all.

Our Story

Gallaher Companies is a development company headquartered in Windsor CA, with projects throughout the Western United States. Founded and run by the Gallaher Family, the company manages all aspects of the development process. From site acquisition, entitlements, architectural and landscape plans, to floor plans and interior design: all is handled in-house. The final phase, building, is realized by the building arm, OSL Construction. With all aspects under the same roof, the company moves swiftly and efficiently with optimal quality control, from beginning to end.

1979

Bill & Cindy Gallaher started building homes in Sonoma Co.

109+

We have over 109 amazing employees & counting

6500

We have built over 6500 units throughout the Western states

Our Focus

The family has a keen focus on quality and functionality in everything that they build. Whether the asset is held or sold, the attention to detail and concern for the final product is evident in every project. During site planning care is taken to optimize views, protect natural landscape features, and maintain sensitivity to possible privacy issues for neighbors.

An architectural style is chosen to complement and enhance the surroundings, with landscaping considered an essential element. Always looking to the future and sensitive to the changing market, Gallaher Companies brings quality, innovative housing projects to the Western States.

Our Leadership

Headquartered in beautiful Sonoma County, Gallaher Companies was built by a passionate team of engineers, designers, operations and growth specialists.