This
list of tallest buildings in Washington, D.C. ranks
high-rises in the
U.S. capital city of
Washington, D.C. The tallest structure in the city, excluding radio towers, is the
Washington Monument, which rises and was completed in 1884. The structure, however, is not generally considered a high-rise building as it does not have successive floors that can be occupied. The tallest habitable building in the city is the
Basilica of the National Shrine of the Immaculate Conception, which rises . The second-tallest building in Washington is the
Old Post Office Building, which is high. The third-tallest building in the city is the
Washington National Cathedral, which rises above grade. The cathedral is built on high ground known as Mount St. Alban, above sea level, which makes the central tower the "highest" point in the District. As of November 2011, there are 410 completed high-rises in the city.