Capitol Hill's landmarks include not only the United States Capitol, but also the Senate and House office buildings, the Supreme Court building, the Library of Congress, the Marine Barracks, the Washington Navy Yard, and Congressional Cemetery. It is, however, largely a residential neighborhood composed predominantly of rowhouses of different stylistic varieties and periods. Side by side exist early 19th century manor houses, Federal townhouses, small frame dwellings, ornate Italianate bracketed houses, and the late 19th century press brick rowhouses with their often whimsical decorative elements combining Richardsonian Romanesque, Queen Anne, and Eastlakian motifs. In the 1990s, gentrification and the booming economy of the District of Columbia meant that the neighborhood's non-historic and obsolete buildings began to be replaced. New buildings, which have to comply with height limits and other restrictions, are often done in a decorative modernist style, many by Amy Weinstein, whose designs feature polychrome brickwork set in patterned relief.
There are multiple schools within the boundaries, including Brent Elementary School, the main primary school, St. Peter's School on Capitol Hill, the only Catholic school, Capitol Hill Day School, Stuart-Hobson Middle School, Elliot-Hine Jr. High School, Eastern High School and many others. The main non-residential corridor of Capitol Hill is Pennsylvania Avenue, a lively commercial street with shops, restaurants and bars. Eastern Market is an 1873 public market on 7th Street SE, where vendors sell fresh meat and produce in indoor stalls and at outdoor farmers' stands. It is also the site of an outdoor flea market every weekend. Barracks Row (8th Street SE), so called because of its proximity to the U.S. Marine Barracks, is one of the city's oldest commercial corridors. It dates to the late 18th century and has recently been revitalized.