The G. W. & W. M. Clayton Building, also known as the Granite Hotel, Granite Building and the Clayton Building, is an 1882 commercial building in Denver, Colorado and is a Denver Landmark. It is a four-story building which was built in 1882 on the site of the first building in Denver, a log cabin. It was built to host the M.J. McNamara Dry Goods Company. G. W. & W. M. Clayton is inscribed near the top of the building for businessman George W. Clayton and his brother William M. Clayton, who served as mayor of Denver. The Denver Public Library has a photograph of the G. W. & W. M. Clayton Building.