Founded in 1986, Sierra Construction Company is a Seattle area general contractor and construction management company specializing in commercial, industrial, mixed use and tenant improvement construction. Our expertise spans a wide range of services– from pre-construction to complete turn-key construction projects. With offices in Woodinville, Washington and Portland, Oregon, we are able to respond to clients' needs up and down the I-5 corridor and throughout the Pacific Northwest. We hold contractor licenses in Washington, Oregon, Idaho and Montana.