Sir Leonard Tilley Building

The Sir Leonard Tilley Building is a federal government structure at Riverside Drive and Heron Road in Ottawa with an L-shaped footprint. The building combines brick exterior walls with a granite base and houses multiple floors of government office space.

The building was constructed in 1961 and served as the main headquarters for Canada's Communications Security Establishment intelligence agency. This function ended in 2015 when the department relocated to a different location.

The building is named after an important Canadian politician and finance minister from the 1800s who helped shape the country's early confederation. This naming reflects his lasting influence on Canada's founding and economic direction.

The building is located at 719 Heron Road and is accessible by public transportation. Access may vary depending on ongoing renovation work, so it is advisable to check current conditions in advance.

The building received official heritage designation in 2002, making it part of Canada's protected structures. This recognition highlights its architectural importance as an example of mid-twentieth-century federal design.

Location: Ottawa

Address: 719 Heron Road

GPS coordinates: 45.37850,-75.68720

Latest update: December 12, 2025 17:41