Stewards of the iconic buildings and grounds of Capitol Hill since 1793.

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The Hart Senate Office Building is the third office structure designed and built to serve the United States Senate.
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Photo of AOC employee Richard Edmonds.
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Library Buildings and Grounds Superintendent's Office

Library Buildings and Grounds Superintendent's Office

Skilled tradespersons work behind the scenes providing services to the Library that include: ensuring a safe and comfortable indoor environment; preserving historic structures; maintenance, repair, and construction; and landscape design, planting, and grounds maintenance.

AOC Library Buildings and Grounds, under the direction of the Architect of the Capitol (AOC), is responsible for the day-to-day structural, mechanical and grounds care of the Library of Congress. This includes the Library's three buildings on Capitol Hill and a number of facilities beyond Washington, D.C., including The Packard Campus of the National Audio-Visual Conservation Center in Culpepper, Virginia.

AOC Library Buildings and Grounds is comprised of a variety of skills and trades including the operation of the air conditioning, electrical, elevator, fire/electronics, masonry, painting and refinishing, plumbing, sheet metal, mechanical, and landscaping design and maintenance.

These skilled tradespersons work behind the scenes providing services to the Library that include: ensuring a safe and comfortable indoor environment; preserving historic structures; maintenance, repair, and construction; and landscape design, planting, and grounds maintenance.

Need Assistance?

Contact the Library of Congress Superintendent's Office 24 hours a day, seven days a week, at 202.707.5157.

Online Work Request Form (must be connected to Capitol Hill network to access link)

Project Updates

Stay up to date on projects underway across Capitol Hill.