A new generation of office space, 120 at Onni South Lake Union is introducing an open, smart, and creatively designed work environment in the heart of Seattle's Innovation District. Ground plane or in the sky, no project offers more outdoor space than 1120. Featuring two rooftop decks, mid-building outdoor patios and amenity space. LEED Gold Certified, with state-of-the-art thermal energy sharing system that. Curated retail to support office workers and residences from work to play.