Clise Properties: The Art of Development Founded in 1889, Clise Properties, Inc. owns and manages more than three million square feet of real estate in the downtown Seattle area. Commercial office properties include the Securities Building, Westin Building, Denny Building, Sixth & Lenora Building and the 1700 Seventh Avenue building. Our latest development, McKenzie, is a luxury apartment high-rise community with the best views in the city.