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Empowering Architecture

At Kearns Mancini Architects, we bring our experience, design skills and technical expertise to create spaces that delight and transform learning, living, working, care and hospitality facilities. We create inspired, iconic architectural visions by clearly identifying our clients’ needs and aspirations, as well as their cultural and market values. We seek out and drive the innate transformative qualities of architecture in a way that will inspire and empower our clients and their communities.

Collectively, we are constantly evolving our culture, technologies and socio-economic systems. Accordingly, the architectural environment must change and adapt. We are agents of change and through our studied processes and humble creativity, we strive for change which intelligently enhances our lives, our impact on each other and through sustainable practices such as Passive House we support and defend the planets ecology for future generations.


We combine our design and technical expertise with real-world experience and a passion to bring colour, form, life, and transparency to all of our projects. We believe in the humility and directness, and, based on our track-record with past clients, we passionately deliver successful transformative projects.

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Passive House

Passive House is ingrained in our methodology. It is part of who we are. With every project that comes through our door, we see an opportunity to deploy our Passive House expertise.


We are honoured to have received numerous awards that recognize our commitment to create spaces that will empower our clients. Here are a few…

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Don Mount Court, Rivertowne

Toronto Home Builder Awards Best Low Rise Project Of The Year


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Ireland Park, Toronto

Ontario Masonry Design Awards | Artistic / Commemorative Design Award


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UTM W.G Davis Building, Toronto

Interior Design Best of Year Awards Award of Honour


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Centre for Addiction & Mental Health, Phase 1A

Toronto Architecture/Urban Design Awards Honourable Mention


View All


At Kearns Mancini Architects we see our clients as partners. We always aim to develop a collaborative approach as we create architecture together as a unified team. Here is what some of our long-standing clients say about us:

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Working with your team has been an unmitigated joy. Their creative imagination, professionalism and goodwill made for a harmonious working relationship the results of which I get to enjoy every day. We are thrilled with the outcome of their work and very proud of what we were able to "concoct" together.

Dr. Gerd Hauck

Director of the REAL Institute

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We consider Kearns Mancini Architects to be the leading Passive House architectural firm in Ontario.

Andrew Arifuzzaman

University of Toronto Scarborough Campus, Chief Administrative Officer

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The Canadian Canoe Museum defers to the landscape and the need to integrate with it, as opposed to standing out like a Bilbao. It’s not architecture as an object, but rather architecture linked to experience. The most significant thing beyond the integration in the landscape is the experience from within, and how the museum frames the view to the outside. It’s a very soft and generous approach to building.

Manon Asselin

Official Juror, Canadian Architect 2016 Awards of Excellence

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We're living in a time of incredible consumption, and everything's about economics and everything's about cash flow, and I think Jonathan Kearns has an ability to stand away from that stuff and feel something that motivates him. He's motivated to do his work in a way that I think a lot of architects and a lot of designers aren't. What I'm saying is that he's got a depth of emotion and feeling, and it comes out.

Bruce Kuwabara

Chair of the Board of Trustees, Canadian Centre for Architecture

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I have had the pleasure of working directly with Kearns Mancini Architects on the University of Toronto's Micro-Satellite and Technology Centre. I am happy to provide a positive review of their incredible work. I highly recommend Kearns Mancini because of their high-quality service to clients, design prowess and project management skills.

Dr. Robert E. Zee

Director, Space Flight Laboratory (University of Toronto Insitute of Aerospace Studies)

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Kearns Mancini Architects is an effective problem-solving team with positive project management skills carried out by their cohesive team of experts. Their attention to detail and knowledge of local school cost/schedule framework has always delivered effective benefit to our Board. Moreover, the quality of Design of this architectural group is outstanding.

K.J. Cochrane

Chief Architect, TCDSB

Our Clients

Meet the Team

At Kearns Mancini, our team becomes a part of your team.

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Jonathan M. Kearns

CEO, Principal in Charge

Jonathan is the Principal-in-Charge and CEO of Kearns Mancini Architects Inc. Born in Ireland, he graduated from the National University School of Architecture in 1974. As the firm’s creative leader, Jonathan has led the firm’s major institutional, community, and award-winning projects including the Canadian Canoe Museum, Fort York Visitor Centre, Senator O’Connor Estate and Coach House, and Ireland Park. In addition to his strong leadership and motivational skills, Jonathan approaches each project with a holistic vision that embraces social, cultural, contextual, functional, economic, and political realities. This allows him to deliver results that are an enlightened architectural form with remarkable attention to detail. Jonathan is also a passionate advocate of the Passive House Standard, the world’s leading standard in energy efficient construction, as well as architecture that integrates seamlessly with its surroundings.

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Donna Eng

Senior Principal

Donna is a Senior Principal at KMAI and has been with the firm for over 30 years. Donna has a wide range of experience but possesses particular expertise in corporate workspace and retail banking. In 2011, KMAI was appointed Chief Consultant for the Bank of Montreal (BMO) and Donna as lead architect. She oversees all aspects of the design and construction of the BMO’s retail bank branches and corporate workspaces. Donna’s talent has allowed her to be immensely successful in executing a cohesive design vision on a project with such varied requirements and unique challenges.

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Peter Ng

Senior Principal

Peter has been with KMAI for 30+ years after graduating from the University of Toronto. He has acted as design project architect for several of the firm’s notable projects including Deloitte Head Office, RBC WaterPark Place III, and George Brown College’s Centre for Hospitality and Culinary Arts and The Chefs’ House Restaurant. Peter’s holistic design approach allows him to develop creative and innovative ways to resolve client programming needs through unique architectural expression. His disciplined and realistic approach to detailing has enabled him to deliver projects within budgetary and schedule constraints without compromising design intent or the programmatic needs of the end users.


At KMAI we strive to support our employees and encourage a healthy work-life balance. Most importantly, we want our team to love what they do.

We’re always looking for talented, creative and passionate people to join our team. Send us your CV via our LinkedIn page.

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