services projects   residential T Street Pavilion Greene Cedar Otis Pl. 2024 Tn Park Rd. Carriage House   contact 1   Carriage House   Washington DC - 2002   Renovation of two early 20th century masonry carriage houses into a single residence. Gronning Architects provided architectural and construction services for this project. The residence features concrete floors, steel structural work, exposed masonry walls, stainless steel kitchen fixtures and over 200 sq. ft. of skylights.