Sustainable Design

Our sustainability outlook begins with the belief that the most responsible buildings are designed to endure, adapt, and operate efficiently over time. We believe in the integration of sustainability and design, where choices are always performance-driven and research-informed.

Sustainability is not a one-size-fits-all solution. We collaborate with clients to develop unique approaches for different projects, scales, typologies, budgets, priorities, and communities. Our strategies include careful material selection, passive strategies, and systems integration.

Purposeful and responsive design

Every design feature has a function and responds to the surrounding environmental conditions.

Bespoke, human-centred solutions

Our process considers how people will use spaces while maintaining environmental and fiscal responsibility.

Bright modern open interior with wooden beams, gray modular seating, indoor plants, large windows, and a staircase with glass railings leading to upper floors.

Zero Carbon Operations

The path to zero-carbon operations starts with a clear, integrated vision for a high-performance building. From the beginning, we consider energy performance to shape a, orientation, envelope, and systems. Our team establishes a carbon budget and sustainability strategy with purpose, carrying these high ambitions throughout the design process. By making the architecture work hard, we significantly reduce the energy required to operate the building.

Modern lounge area with large floor-to-ceiling windows, orange cushioned chairs and sofas, wooden tables, and natural wood ceiling.Modern atrium with wooden beams, glass railings, a central vertical wooden panel, indoor plants, and gray lounge seating with a person using a mobile device.

Mass Timber Design

Low-carbon material choices shape both the environmental impact and the experience of occupying a building. We lower embodied carbon and define the architectural vision of our projects by using natural and renewable materials, including mass timber. To help us balance carbon data with design criteria, we employ a life cycle assessment during our iterative process.

Modern communal lounge with wooden paneling, large windows, tables, chairs, and people sitting and standing.Two people standing on a sunlit corridor with large wooden beams and floor-to-ceiling windows, one person pointing outside.Modern two-story school building with large windows surrounded by children playing outdoors amid autumn foliage and landscaped gardens.

Sustainability Frameworks

Sustainability frameworks and certifications serve as a shared language for building owners to demonstrate leadership in high-performance design. Our experience spans some of the most rigorous standards, from LEED Platinum to Zero Carbon Building Standard certifications. We also work with local and federal public policies, such as the Toronto Green Standard and the Federal Greening Government Strategy with experience in policy compliance and development.

Modern glass greenhouse structure with plants inside, adjacent to a beige institutional building, with a person riding a bicycle in front.

Regenerative Site Integration

Our consideration of landscape alongside architecture is grounded by the land and what existed on site before development. MTA approaches each place as a part of a broader ecological system, creating resilient buildings that respond to and strengthen the natural conditions around them.

Curved building facade covered with colorful rectangular glass panels reflecting trees, with tall grass in the foreground and a blue sky with clouds above.Modern building with slanted concrete wall, a railing, grass, and a cloudy sky.

Retrofit and Reuse

The reuse of existing structures provides cost and carbon benefits while allowing us to preserve the cultural significance of a building. Our approach to renewal considers performance, life cycle value, and long-term stewardship. We develop retrofit strategies that elevate existing buildings to higher levels of performance while balancing the social, environmental, and civic context embodied in them.

Interior of the Supreme Court of Canada featuring a large open atrium with a spiral staircase, multiple people standing and talking, and light streaming through a glass ceiling.Modern building with vertical wooden slats surrounded by trees and people walking and sitting on the grass.

Select Awards

AZ Award, Environmental Leadership for Limberlost Place
2026
Research & Innovation in Architecture Award
2023
Future Project Awards Sustainability Prize
2019
Excellence in Urban Sustainability
2005
Modern single-story building with outdoor seating surrounded by trees and wildflowers, with people dining and socializing.