Allen Jack+Cottier

Allen Jack + Cottier (AJC Architects) is a distinguished Sydney-based architectural firm founded in 1952 by John Allen and Russell Jack, later joined by Keith Cottier in the mid-1960s. Over decades, AJC has built a reputation for design excellence across urban planning, architecture, heritage conservation, interiors, and graphic design. The firm is known for its impactful and enduring projects—from educational campuses to master-planned precincts and adaptive reuse. Their work is marked by architectural rigor, contextual sensitivity, and a commitment to sustainability and innovation