According to Star Trek Enterprise (Broken Bow), the Vulcan Consulate is situated on a Vulcan Compound of Sausalito (California).
This model is only a fortress that serves as base for it. I'm still working on it. The story background, is the following: When Vulcan's met the human by 2063, human had worsened because wars. This fortress was built during the Eugenic Wars. When vulcans and humans relations advanced, Vulcan's government requested a site to install a permanent group on Earth. They were given this fortress, which wasn't in very good status. Tough, vulcans managed to turn it their home. Not only the Vulcan Consultate is there, but also some workers' homes #sausalito #star_trek #vulcan