Tim McDonald

President | Onion Flats

Timothy McDonald received his Bachelor of Architecture degree from Pennsylvania State University and his Masters of Architectural History and Theory from McGill University. He has practiced in Japan, Canada, and the United States; is a Registered Architect in Pennsylvania, New Jersey, and Massachusetts; Leadership in Energy and Environmental Design® (LEED) AP, Certified Passive House Consultant and Tradesman (CPHC); and President of Onion Flats, LLC, an award-winning development/design/build collective centered in Philadelphia. He has been teaching and practicing for more than 20 years with a focus on community development, multidisciplinary thinking, and making high-performance building technologies and alternative construction methodologies. Through his research and practice, Tim, along with his partners at Onion Flats, has developed, designed, and built some of the first LEED Gold and Platinum projects in the country, and the first certified passive house, net-zero-energy-capable project in Pennsylvania.