In December 1965, a bylaw was passed by Braeside Council to commemorate Canada's Centennial by building a new municipal office with an estimated cost of $25,000.00. Coming in on budget, M. Sullivan & Son of Arnprior constructed the building which was located on Centre Street near the fire hall. Reeve Dick Robbins and council members Frank Kelford, Neil Mullen, John A. Gillies and Bill Meek presided over the opening ceremonies which took place September 6, 1967.
In January 1998, amalgamation throughout the province of Ontario resulted in Braeside joining McNab Township to become the Municipality of McNab/Braeside. The Braeside municipal building was then used by the volunteer fire department.