First Interstate Will Change its Bay Area address.

The Los Angeles banking company said it will relocate its Northern California headquarters to 345 California St., the newly constructed 48-story, twin-tower structure in San Francisco’s financial district. All employees currently working in the 405 Montgomery headquarters will move to the new location, which will be renamed First Interstate Center. The building, currently known as California Center, will include shops, restaurants, an athletic club and a luxury hotel.