About Us

About ONE Development


ONE Development manages and develops innovative, design-driven, green development on urban sites in Toronto and other growing municipalities. Based on a thorough knowledge of the market, patterns of growth and planning criteria, we identify potential development opportunities and unlock their value through market responsive strategies of growth that are enduring, sustainable and innovative by design.

The Triple Bottom Line

A triple bottom line approach attributes value to the social, environmental and financial "bottom line" of every project to achieve win-win-win solutions. Reinforcing positive social and community goals and building healthy and energy conscious buildings increases the financial success of each development.

Jeff O'Brien, CFA

Jeff O’Brien is the Chairman and CEO of ONE Development Corporation and has experience in commercial real estate ownership, development, and management.  Mr. O’Brien is also the CEO and Director of a boutique investment fund focused on investing in a balanced portfolio of high quality commercial and residential real estate properties primarily in the Canadian urban real estate markets.  In addition to his real estate experience, Mr. O’Brien is also the founder of a specialized investment products firm providing Canadian investors with innovative investment solutions that offer the potential growth and returns of the world's equity markets, while minimizing risk to their invested capital.  Since launching the first product in 2002, Mr. O’Brien has raised over $300 million.  Mr. O’Brien has also enjoyed a successful career as an Investment Advisor within the brokerage arm of a major Canadian Chartered Bank where he managed portfolios for small to mid-sized institutions and high-net worth investors. Mr. O’Brien is a CFA Charterholder and holds an Honours Bachelor of Commerce degree from McMaster University.