Building energy use is the third largest source of greenhouse gas emissions in Canada. New buildings constructed today will last for half a century or more. If we build 5.8 million units using today’s building standards, it will lock in approximately 12.9 megatonnes of greenhouse gas emissions each year those buildings are in operation.

New research from Efficiency Canada shows that how we build matters. It studies the impact of building codes during this anticipated increase in new housing construction. The findings highlight a unique opportunity to tackle the twin challenges of housing and climate while increasing household affordability.

Key Finding #1: If all provinces adopt the most ambitious tier of Canada’s building codes — net zero energy ready standard — it will produce 20% fewer emissions per year.

Provinces and territories have agreed to reach net-zero energy-ready standard by 2030. A building measuring up to this standard is energy efficient enough to meet its annual energy needs with the addition of on-site renewables or off-site clean energy.

However, adoption of the tiered codes has been limited.  As of yet, only British Columbia has adopted and implemented an upper tier (tier 3) without restrictions.

Key Finding #2: If we reach net zero energy ready standard by 2030, it could reduce household spending by $3 billion per year.

Both building owners and occupants will be able to achieve long-term affordability through lower energy and maintenance costs. Well-designed, insulated and air-sealed homes also protect people from extreme heat, forest fire smoke and other serious weather events associated with climate change.

Key Finding #3: If we build to a net zero energy ready standard and implement full electrification starting in 2025, Canada can reduce emissions by ⅔ and reduce household spending by $5 billion per year.

Building electrification—using electricity or other zero-carbon fuels for space and water  heating and cooking—offers an emissions-neutral path for newly built residential housing. Electrification can also improve comfort and air quality leading to greater health for building occupants.

In addition to the buildings themselves, we’ll need to construct new supply chains, skilled workforces and critically a retrofit economy to support the transition.

Provincial and territorial governments have the opportunity to address the housing and climate crises right now. By adopting the highest tier of Canada’s Building Codes, they can set every new building on the path to net-zero emissions.

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