BDP Quadrangle

BDP Quadrangle is the North American studio of UK-based global architecture, design, and urbanism firm, BDP.

Quadrangle was founded in June 1986 as a merger between two firms, Klein Taylor Goldsmith and Curtner Brown Architects. The firm's four founding partners were Hugh Taylor, Philip Goldsmith, Brian Curtner, and Leslie M. Klein. What started as a small, closely held corporation grew into a multiple shareholder corporation over the years.

The firm gained recognition in 1987, after transforming a heritage building at 299 Queen Street West into the headquarters of the CHUM media brand. The building is now known as Bell Media Queen Street. In 2016, the building was awarded landmark designation by the Ontario Association of Architects (OAA).

In 2010, Quadrangle initiated a joint venture with the March of Dimes Canada called AccessAbility Advantage, which was established to create more accessible built environments. In 2018, Quadrangle decided to end this partnership with March of Dimes, and instead launched Human Space, a new brand that expanded its services in human centred design to include wellness and resilience in addition to accessibility.

In February 2019, Quadrangle joined BDP.

In November 2020, the firm changed its name to BDP Quadrangle.

Inclusivity, sustainability, and accessibility are important considerations for the firm.

The company has, since 1999, maintained female principals, and in 2019, Principal and Design Director Heather Rolleston joined Toronto's first all-female development team, which is composed of engineers, architects and urban planners.