https://www.siliconvalley.com/2022/07/07/labor-union-buy-concord-building-new-office-real-estate-develop/ > CONCORD — An East Bay labor union has bought a Concord office building that will serve as the organization’s new headquarters. > Operating Engineers Local 3 is moving to a building at 3000 Clayton Road in Concord in the wake of the union’s purchase of the property.