The Union Bank Building sits at the epicenter of Portland' s business and financial districts. Green-tinted windows and grey-green Elterwater slate give this 15-story office building a crisp, clean look even on gray Northwest days. A handsome slate and teak-paneled lobby with a 35-foot high ceiling adds to the building' s spaciousness. Beautiful woods including white oak, olive veneer, teak and rosewood are artfully used throughout. Floors are designed to be open and uninterrupted by interior columns or service core. The Union Bank Building provides excellent views of the city, the Cascade Mountains and the Willamette River. And an underground connection to the Westin Benson Hotel allows quick and easy access to dining and hotel accommodations. Central Business District.