Ehsan Noroozinejad Farsangi, University of British Columbia and T.Y. Yang, University of British Columbia

Net-zero homes use natural energy sources and are designed to use less energy and, as such, are considered important in the fight against climate change. But for the average Canadian, they’re still out of reach.

Net-zero homes are important for tackling climate change. This includes both net-zero energy (NZE) homes, which produce as much energy as they use each year, and net-zero carbon (NZC) homes, which don’t release any carbon dioxide.

Released in the summer of 2024, the Canada Green Buildings Strategy outlines a bold vision to transform the country’s building sector, aiming for net-zero emissions and enhanced resilience by 2050. This is a bold step forward, but transforming the sector will require sustained collaboration across all levels of government, industry and communities.

Net-zero homes use green energy sources and efficient designs to match the amount of energy they produce with the amount they use. They use strategies like thermal shells that use less energy, high-performance components and the addition of green energy systems.

Net-zero homes also help Canada reach larger climate goals by reducing the amount of carbon dioxide it releases into the air.

Purchasing and installing these technologies can be cost-prohibitive, but in the long run, homeowners both save money on power bills and reduce their greenhouse gas emissions.

Those who are unable to make changes to their homes can still live in a net-zero way by buying green power or carbon offsets.

The sustainable housing market

Net-zero homes are becoming more popular in Canada. To speed up building processes and reduce costs, builders are trying out pre-fabricated and modular building techniques.

In 2024, the Canadian federal government announced a $600 million package of loans and funding to help make it easier and cheaper to build homes. This funding will support innovative technologies like pre-fabricated and modular construction, robotics, 3D-printing and mass timber to build homes faster and cheaper.

The Net Zero Council of the Canadian Home Builders’ Association has also been important in enhancing standards and practices and promoting novel approaches that cut costs while still being environmentally friendly. In doing so, CHBA drives the adoption of cheaper, environmentally friendly technologies and processes, enhancing industry standards and practices across Canada.

While CHBA collaborates with government agencies, such as Natural Resources Canada to promote innovation and elevate industry standards. Government programs typically provide funding, technical support and policy guidance, whereas CHBA focuses on training, best practices and market development for its members.

Government research programs through CanmetENERGY also work to improve technologies and give builders and planners the tools they need.

There are several reasons that owning a net-zero home has not yet become widespread. These include: high initial costs, limited awareness and education, gaps in policy and regulation and market challenges including difficulties in scaling up and integrating net-zero technologies.

Future directions

To make net-zero homes accessible to all Canadians, a multi-faceted approach is required.

Increased subsidies and incentives and expanding financial support for both builders and buyers can lower barriers to entry. The government of Canada’s 2030 Emission Reduction Plan includes $9.1 billion in new investments over the next eight years — adding to the $17 billion announced in 2021 — to support decarbonization efforts.

Enhancing public awareness and developing educational campaigns highlighting the cost savings and environmental benefits of net-zero homes are both essential approaches to raising awareness and support.

Policy reform can accelerate adoption of net-zero homes. Examples include harmonizing building codes and introducing mandatory energy efficiency standards to accelerate adoption.

Supporting continued research into technical innovation and developing cost-effective materials and renewable energy systems will drive down costs. Investment in modern methods of construction should be prioritized to accelerate the transition toward sustainable and energy-efficient building practices.

Partnerships between governments, private developers and non-profits can bring together resources and expertise to scale net-zero housing initiatives.

The Sustainable Finance Action Council recommends steps to mobilize private capital to support decarbonization and climate resilience in the Canadian economy, including in the housing sector.

Successful international models

Several countries have demonstrated how net-zero homes can become a reality through innovative policies, community-driven approaches and public-private partnerships:

BedZED in the United Kingdom is the country’s first eco-village project. It uses community-focused design and renewables to significantly cut carbon footprints.

The Passive House standard is a German housing policy that sets a global benchmark for ultra-low energy consumption, emphasizing airtight construction and heat recovery.

California’s ambitious Zero Net Energy policies help reduce overall carbon footprints by driving cutting-edge home construction practices.

The Net Zero Energy House (ZEH) Program in Japan encourages advanced insulation, efficient appliances and rooftop solar.

The Netherlands is a leader in innovative, large-scale retrofitting for net-zero housing, most notably through the Energiesprong program.

These international models highlight that success lies in integrating strong policy frameworks, advanced technology and collaborative practices. They demonstrate that with the right mix of government support, industry innovation and residents embracing green choices, net-zero living can become more widespread.

Housing is an important part of how to address climate change. As Canada pushes to make net-zero homes more affordable, each step forward strengthens communities, reduces greenhouse gas emissions and helps homeowners save money.

Ehsan Noroozinejad Farsangi, Visiting Senior Researcher, Smart Structures Research Group, University of British Columbia and T.Y. Yang, Professor, Structural & Earthquake Engineering, University of British Columbia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Architecture & Design Team

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