Since 1983, McDonnell Landscape Inc. has provided total grounds maintenance, landscape installation, and snow removal services to demanding clients. Looking for proven ability to handle large, high-profile projects? We've worked at the White House, the Capitol, the Lincoln Memorial, the Jefferson Memorial, and the Smithsonian Institution. Need a firm that can provide high-quality service over a large area? We've handled the George Washington and Clara Barton Parkways, plus, we provide grounds maintenance to large counties with buildings and roadways spread over extended areas.