Canada’s largest public infrastructure projects have climbed to a combined value of $343 billion, marking a record $43-billion year-over-year increase.

The surge, detailed in the 2026 Top100 Projects Report from ReNew Canada, represents the largest annual jump in the report’s 20-year history and underscores accelerating investment in long-term public assets across the country.

Nuclear energy is the primary driver of the increase, with nearly $50 billion tied to major Ontario initiatives, including the Pickering Generating Station refurbishment in Pickering and the Darlington New Nuclear project in Clarington, Ont.. Along with refurbishments at Bruce Power and Darlington, nuclear developments now account for four of the top six projects on the 2026 list.

Transit remains the largest sector by total value, comprising 25 projects worth $123 billion, followed by buildings at $81 billion and energy at $80 billion. The list also added 12 new projects valued at $70 billion, spanning energy, buildings and transit, including Calgary’s relaunched Green Line LRT, Toronto’s Yonge–North Subway Extension and the proposed Alto high-speed rail network between Toronto and Quebec City.

The Top100 Projects Report is an annual ranking of the largest public-sector infrastructure projects currently under development in Canada.

Pictured: The future Darlington New Nuclear Project in Clarington, Ont.

Rendering: OPG