The Sir Leonard Tilley Building is one of many government offices that surround Riverside Drive in Confederation Heights. The building was constructed to serve as the headquarters for the Communications Security Establishment (CSE), and has its functional roots in Canada’s national security.

The original building is configured in an L-shape, with a later annex being added in the space between the wings. The partial curtain wall of the building is clad in brick and sits on top of a granite base.

The Sir Leonard Tilley Building is a Recognized Federal Heritage Building.

More information on the Sir Leonard Tilley Building can be found at the Related Resources.