The studio was founded by Weijia Song and Alex Yuen with operations in San Francisco, California and in Auckland, New Zealand. CO- is a multinational firm that believes each field -  architecture, urban design, and real estate development - creates the most impact when working alongside each other. CO- operates with an overarching goal to create responsible, sustainable, and cost-effective projects for our public and private partners.

Weijia Song, RA

Weijia Song is an architect and an affordable housing developer. Hailing from Auckland, New Zealand, Song received her Bachelor of Architecture from Rice University and Master of Science in Real Estate Development from the Massachusetts Institute of Technology where she was a Samuel Tak Lee Real Estate Entrepreneurship Fellow and the recipient of the MIT Center for Real Estate Thesis Excellence Award.


Previously, Song was an Associate Architect at SHoP Architects in New York, where she helped design and manage a series of large-scale public infrastructure projects and private developments including the East River Waterfront Esplanade. Additionally, Song has spent time at Investbridge Capital in Dubai, where she has experience in investment analysis and fund structuring. She has also worked on urban design and architectural projects with Ricardo Bofill Taller de Arquitectura and WW Architects. She is a Registered Architect in New Zealand and the states of California and New York and a LEED Green Associate.

Alex Yuen is an architect and urban designer. Hailing from Hong Kong and San Francisco, Yuen received a Bachelor of Architecture from Rice University and a Masters of Architecture in Urban Design, with Distinction, from the Harvard University Graduate School of Design. His individual design work and involvement in larger urban research projects have been published and exhibited globally. Yuen is the recipient of numerous awards including the Odebrecht Award for Sustainable Development, the William Ward Watkin Fellowship from the Rice School of Architecture, and the Award for Excellence in Urban Design and the Urban Design Thesis Award from the GSD.


Yuen worked as an architectural and urban designer on a range of public, private, and research projects at the New York offices of Diller Scofidio + Renfro and the Office for Metropolitan Architecture (OMA), including the 11th Street Bridge Park and a masterplan for a resilient Hoboken. As an urbanist, Yuen has researched cities around the world and continues to be fascinated by the evolution of cities in the 21st century. He is currently a faculty member at the Harvard University Graduate School of Design and has previously taught at the California College of Arts and University of Virginia, while also having lectured on architecture and urbanism and serving on juries at institutions around the world. Yuen is a registered architect in California and New York and a LEED Green Associate.