Firm Profile


gh3* is a peer-recognized and award-winning Canadian design practice. Partners Pat Hanson and Raymond Chow lead an office team of twenty that includes architects, landscape architects, designers, and technical staff. Our office works in the increasingly complex realm where architecture, urbanism and landscape overlap. We design with a modernist’s eye to order, beauty, and social possibility, an environmentalist’s awareness of sustainability and long-term thinking.

gh3* has been awarded Governor General’s Medals for the Borden Park Pavilion in Edmonton and the Boathouse Studio on Stony Lake in Ontario. We have completed projects at every scale, from small park pavilions and private houses to large civic and transit infrastructure, most recently Canada's first natural swimming pool for the City of Edmonton.

Our energetic and interdisciplinary team is committed to the best in creative practice. We bring a tailored, client-centred approach to every stage of the design and construction process, with the aim of achieving pragmatic, poetic, environmentally-responsible, and aesthetically powerful design solutions. We believe that excellent design is an essential part of everyday life, and that spatially and visually engaging places can inspire joy and civic pride.




Pat Hanson (Partner BFA MArch OAA AAA FRAIC) is a founding partner of gh3*. Under her leadership, the firm has established a reputation for design integrity across a range of building typologies and through all scales of practice. She is the architect of institutional, infrastructural and residential projects that create meaningful connections between architecture and landscape within the urban realm. Exemplary projects include the internationally-recognized June Callwood Park in Toronto, the Trinity College Quadrangle at the University of Toronto, and the Governor General's Medal-awarded projects Borden Park Pavilion in Edmonton and the Boathouse Studio on Stoney Lake, Ontario.

Pat is an expert communicator of compelling design visions that are both environmentally and socially sustainable. She is a strong and insightful advocate for the potential for built form to rise above the merely functional, to integrate the pragmatic with the poetic, and to achieve an aesthetic impact that brings pleasure to everyday uses. For over 30 years, she has led clients and interdisciplinary design teams through complex programs, negotiating extensive public consultation processes to achieve internationally-recognized, award-winning projects, whether at the scale of infrastructure or the sheltering of a community programme. Prior to gh3*, Pat served as partner in charge for the Pond Road Residence at York University, Woodsworth College at the University of Toronto, the Fred Kaiser Engineering Building at University of British Columbia and the School of Business at Seneca College.

She currently serves on the Toronto Waterfront Design Review Panel, and is a senior advisor for Building Equality in Architecture Toronto (BEAT), which supports diversity and women in the design fields. She has lectured on the work of gh3* in Europe and North America, and has taught at University of Toronto and University of Waterloo. In 2016, Pat was recognized by the international arcVision Prize for Women and Architecture.



Raymond Chow (Partner OAA RAIC OALA MArch BArch) brings to gh3* an expertise grounded in more than fifteen years of professional architectural practice. Raymond negotiates all phases of project development, from enabling client and consultant dialogue, through to design development and construction administration. His commitment to the realization of architectural excellence is based on keen attention to technical detail and astute management of the design process. He has worked across multiple jurisdictions and through scales of practice that range from small renovations to large multi-stakeholder institutional projects. 

Raymond joined gh3* in 2006 and became a named partner in 2015. He became an associate of the Ontario Association of Landscape Architects in 2013, and is currently working toward full registration as a landscape architect. He is key to the firm's integrated, studio-based design practice with technical capacity across the design fields of architecture, landscape, and urban design. A strong advocate for BIM and for design practice connected to industry, Raymond oversees gh3*’s digital modelling processes, rendering, and all other technical interfaces. He is currently project architect for the Natural Swimming Pool in Edmonton, the Storm Water Control Facility at Toronto’s waterfront, as well as several large-scale residential projects.



Joel Di Giacomo (Associate BES MArch) is a graduate from the University of Waterloo School of Architecture, with over 10 years experience on projects including numerous and extensive landscape designs, cultural and civic masterplans, transit infrastructure, and buildings at a wide range of scales. He has played a key role in the design of the Davenport Diamond Public Realm, Finch West LRT DX, and June Callwood Park, and has contributed design expertise to most past and current projects in the office. 

Joel brings a playful, proficient, and extremely rigorous approach to the design process, with particular aptitudes in advanced digital modelling techniques, the production of visual representations, and marketing. He is currently overseeing gh3*s website curation and design, and is working on the Pier 8 Development and LRT projects in Hamilton.
416 915 1791 ext 31



Mani Tabrizi (Associate BEng BSciArch MArch) holds a Master of Architecture degree from the University of Toronto as well as Bachelor of Mechanical engineering and Architectural Science degrees from Ryerson University. Prior to joining gh3, he spent a number of years working at design-focused Toronto offices, achieving LEED accreditation in 2009. His realized work includes industrial design, architecture, and regional strategic planning projects in North America, Jordan, Denmark, and Morocco. This deliberate interdisciplinary experience enables him to apply rational, detailed, and empirical methodologies to a dynamic and creative design process. In recent years, Mani has focused on private residential and medium-to-large multifamily projects, in both the luxury and affordable segments of the sector.
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Byron White (Associate BArch MArch) has been managing architecture and landscape architecture projects at gh3* since 2010. He has contributed to many of gh3*s award-winning projects including Borden Park Pavilion, Real Time Control 3, North East Transit Garage, Natural Swim Experience, and Storm Water Quality Facility. While proficient at all scales, he has a special interest in single-family residences, where strong relationships can be forged between client, contractor, and architect. In addition to a number of private homes, his current projects include the Davenport Diamond Rail Elevated Guideway and Greenway in Toronto and the Thomas Ferrier Bus Maintenance Facility in Edmonton. Byron holds a Bachelor of Arts in Architecture and a Masters of Architecture from the University of Toronto.
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Elise Shelley (Director of Landscape OALA AALA CSLA CPSI) is the landscape director of gh3*, a registered landscape architect with 20 years experience in projects of all scales. Elise’s background and training in both architecture and landscape has enabled a method of practice that focuses on the physical, experiential and functional connections between interior and exterior space.

Focused on the interdisciplinary nature of urban places, Elise’s work addresses material innovation, community-engagement, and ecological resilience. Award-winning urban play-space projects include gardens and playgrounds for city daycares, public schools and non-profit organizations. In addition to Landscape Architecture licensure in the US and Canada (Ontario and Alberta), Elise is certified in Playground Safety Inspection by the National Recreation and Park Association.

Elise has lectured throughout North America and Europe and her work on resilient landscapes and contemporary children’s play-spaces has been presented at several international conferences. She maintains a strong commitment to landscape architectural education and has been an assistant professor at the University of Toronto since 2003.

Currently, Elise is guiding the landscape design for all gh3* projects, including the Davenport Diamond Elevated Guideway and Greenway, streetscape and park designs for several new development blocks, and a number of transit-related landscapes throughout Canada.
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Bianca Vellone


Dae-Hee Kim
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Donna Hanson


Farhan Durrani


Hadrien Thiabaud


Jan Adegeest
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Jeff Gagnon
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Jeff Szeto
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Jeffrey Deng
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Kourosh Fathi


Mehdi Latifian


Naomi Shewchuk
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Nick Callies
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Richard Freeman


Shawna Seligman
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Vanessa Abram
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Vanessa Hii
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