St. Louis — Construction is complete for the $3 million historic renovation of the former Langenberg Hat Building in Washington, Mo., at 330 West Front St. As general contractor, Knoebel Construction converted the two-story brick building into a multi-use space featuring six, two-bedroom lofts and Streetside Tacos, a sit-down restaurant on the first floor. The developer was Marquart Landing Properties, L.L.C., and the architect was The Van Hooser Partnership.