Built Green is an environmentally-friendly, non-profit, residential building program of the Master Builders Association of King and Snohomish Counties, developed in partnership with King County, Snohomish County, and other agencies in Washington State.

Our mission is to support and inspire sustainable design, construction, and development in the communities of King and Snohomish Counties.

Built Green certifies green homes, educates members and the public about green building, conducts green building research, and more.