HBC Construction Walnut Creek CA 94595,USA Service:ADU Walnut Creek ADU Builders | Prefab and Custom ADU Homes Professional ADU construction in Walnut Creek, CA. Choose from prefab units or custom designs. Complete permitting assistance and expert installation. Contact: 1 650-444-2017 Web Link:https://hbcconstruction.info/ Email: [email protected] Business Profile ID:7290... https://hbcconstruction.info/