1,000
Geothermal-heated/cooled low-rise homes since 2021
Energy-Efficient and Lower-Carbon Homes
“Our commitment to building better communities means finding practical ways to reduce environmental impact while delivering real value to homeowners.”
Collin Campbell
Division President, Alberta
Mattamy Homes Energy Achievements for FY2026
1,000
Homes in Alberta with solar panels, now a standard feature for Mattamy homes built in the province
905
Alberta-based homes received EnerGuide ratings
2,537
Homes built in Ontario received ENERGY STAR ratings
4,000+
U.S. homes closed that received HERS ratings
1,301
Homes in the U.S received ENERGY STAR ratings
Our Carbon Focus
Mattamy builds homes with the future in mind – homes that are designed to meet the needs of homeowners today and for decades to come. Where possible, we prioritize the use of products and processes that align with our efforts to reduce GHG emissions from our activities. We rigorously measure and understand our homes’ whole building life cycle and apply that understanding to refine and improve our carbon-reduction strategy.
Achieving Our Decarbonization Targets
In FY2026, Mattamy reduced greenhouse gas (GHG) emissions across its operations by more than 14% from local building code. To achieve this, we built on the foundation of effort and innovation laid by teams in Canada and the U.S. In realizing our company-wide goal, we relied on our local divisions’ knowledge of codes, energy infrastructure and even local climates, which enabled us to implement GHG reduction approaches tailored to their respective markets.
As the attainability and affordability of homes have become increasingly important to prospective homebuyers, we made sure to highlight the connection between GHG reductions and improved energy efficiency. Through this lens, sustainability becomes a selling feature.
Understanding Scopes 1, 2 and 3
We quantify our GHG emissions inventory according to the GHG Protocol Corporate Standard. GHG emissions include several types of gases. Each gas has its own global warming potential (GWP). To equate GHG emissions to a common metric, we convert them to tonnes of carbon dioxide equivalent (tCO2e). When we are referring to “carbon”, we are referring to tCO2e.
Scope 1
Direct GHG emissions from sources owned or controlled by Mattamy (e.g., fuels we purchase for our vehicle fleet or to warm homes under construction in the winter months)
Scope 2
Indirect GHG emissions from electricity, steam, heating and cooling purchased by Mattamy (e.g., electricity used for our offices, sales centres and construction-site trailers)
Scope 3
GHG emissions that result from our activities but occur from sources not owned or controlled by Mattamy (e.g., our homes’ long-term operation, purchased goods and air travel)
What is Mattamy's calculated embodied carbon?
The amount of carbon emitted during construction includes the carbon emitted from extracting raw materials, processing and manufacturing building materials for the construction of our homes. These materials include, but are not limited to, the production of concrete, brick, insulation, metals and lumber.
What is Mattamy's calculated operational carbon?
The amount of carbon that a building or home emits during its use. This includes carbon emitted in the production or consumption of energy used in the operation of the home over its lifetime.
Whole Building Lifecycle Assessment
Setting Our Decarbonization Targets
The best way to demonstrate what is possible is to take action. Mattamy has embraced this approach for many years. In FY2026, we put it into practice by surpassing our target of achieving a 14% GHG reduction in our sold homes as compared to code-built homes.
Mattamy’s commitment to reducing GHG emissions from our activities is as strong as ever, and our strategy remains grounded in realistic, affordable reduction targets informed by input from across our organization. Additionally, we are happy to learn from peers and partners in the construction industry.
Reflecting our diverse range of geographies, we set our decarbonization targets from the “bottom up.” Every building site is a laboratory where we can test methods and innovative materials, such as low-carbon concrete and steel. We established fully costed strategies that incorporated local building codes, emissions factors and climate zones. We also introduced the cost-per-reduced-tonne-of-CO2e metric, so our strategies work for both the business and the environment.
Our Decarbonization Targets for FY2027
Since setting our first GHG reduction target in 2024, Mattamy has continued to exceed our reduction targets each year.
In FY2026, we surpassed our goal of achieving a 14% GHG reduction in our sold homes as compared to code-built homes1.
For FY2027, we are reaffirming this target and our commitment to continued progress.
Evaluating Our Impact
To stay on track as we approach the five-year milestone for setting and achieving our early-stage GHG emissions reduction goals, we closely monitor our current performance. While archetype modelling still plays an important role in our planning, Mattamy is increasingly able to base performance and projections on built homes selected across our geographies.
Archetype Modelling
To establish our initial goals, we began with a set of model archetype homes, developed through consultations with internal stakeholders and building science experts, to represent our various low-rise divisions – specifically, detached single-family homes and attached townhomes. To create data sets for both GHG emissions and energy consumption, we assessed these archetypes using energy modelling and embodied carbon calculators.
Moving forward, we will continue to pursue opportunities to base performance projections and evaluations on built homes, similar to the assessment approach taken with Mattamy’s urban structures, where findings are largely based on actual buildings rather than archetypes.
GHG Emissions Intensity
To understand the GHG emissions generated by our activities, we examine them from several perspectives, starting with the homes we build. One metric we use to assess our homes across multiple built forms is GHG emissions; the calculation divides our total GHG emissions (i.e., operational and embodied carbon) by the home’s square metres (kgCO2e/sq. m). The result helps us better understand product design and efficiency, as well as material choices and geographical impacts. These data are essential to formulating and evaluating our decarbonization strategy.
1 A code-built home is a home that is projected to only meet the minimum requirements to be code compliant with the municipal, provincial, state or national requirements for a home to receive an occupancy permit.