Shaw received another major commission in 1906, this time in the Chicago Loop. The sixteen-story Mentor Building was designed in the Chicago style, but also retained neoclassical elements. Unlike other buildings in the style, the Mentor buildings have clear base, middle, and top sections, reminiscent of European tradition. The building still stands today and is part of the Loop Retail Historic District. In 1910, he designed an eight-story apartment building in the Gold Coast that would become the first cooperatively owned apartment building in Chicago.