The Connaught Building was designed by David Ewart.
As chief government architect he was responsible for many of the federal buildings constructed in this period. He broke with the Neo-Gothic style adopted by his predecessors Thomas Seaton Scott and Thomas Fuller; rather he embraced the Baronial style exemplified in several important buildings including:
- the Victoria Memorial Building
- the Royal Canadian Mint
- the Connaught Building
- the Bowmanville Post Office
- the Mappin Wing (or front facade) of Rideau Hall
As federal architect he also oversaw the design and construction of numerous post offices across Canada. His son John Albert Ewart was also a prominent Ottawa architect.
