06.25.26
Reusing existing buildings key to climate and housing goals
Canadian Architect, Construction Canada, Building
In May 2026, the Canadian Association of Heritage Professionals (CAHP) published a national report examining how existing buildings can help Canada address its climate and housing goals while maintaining community character and cultural value.
The study was prepared by a multidisciplinary national team assembled to examine compliance pathways for existing and heritage buildings under the National Building Code (NBC) and the National Energy Code for Buildings (NECB), with the goal of supporting the transition toward future retrofit-focused codes in Canada. Co-led by Giaimo and Ha/f Climate Design, the team was strategically composed to draw on expertise from both heritage conservation and architectural perspectives, as well as from key technical disciplines.
The study reviewed three retrofit and adaptive reuse projects in Halifax, Montreal, and Vancouver, including a mid-century modern office building, a former textile factory, and a historic residence. The team compared these projects against new-build alternatives across three scenarios: retrofit, retrofit with an addition, and demolition and replacement. Using a conservation-led approach, the analysis incorporated life-cycle assessment and cost modelling methodologies aligned with the National Building Code (NBC) and National Energy Code for Buildings (NECB).
Since its publication, the report has received national attention and has been featured in Canadian Architect, Construction Canada, and Building, helping to broaden the conversation around adaptive reuse, retrofit-focused code development, and the role of existing buildings in addressing Canada’s climate and housing challenges.
Read the full articles here:
