EPIISOD Macquarie Park
Centurion
From humble beginnings to a powerhouse practice, AJC has been thinking about, and shaping modern Sydney in both subtle and profound ways for seven decades.
Originally formed in 1956 with the partnership of friends John Allen and Russell Jack, who were joined in 1965 by Keith Cottier, and the Sydney studio of Allen Jack+Cottier was born. It became synonymous with creative, spatially inspiring spaces and places.
True to that legacy, today AJC works across even more sectors and scales, from education and commercial projects to luxury and affordable residential developments, and master planning for urban growth and renewal.
We’ve earned scores of awards locally and internationally, but more importantly, we’re proud to say our work has changed the way people live, learn, work and play, with buildings and precincts perfectly tuned to their purpose and place.
Galuwa Recreation Centre, Lane Cove Council
The Southern Lookout, Hornsby Shire Council
88 Waterloo Road, Billbergia and Legacy Property
EPIISOD Macquarie Park, Centurion
Our Story
AJC has been instrumental in helping shape the growth of Sydney both as a consultant to planning authorities, and through its own exemplar projects, setting benchmarks for liveability and urban density.
Awards
Since receiving our first award in 1957, AJC has been nationally and internationally recognised for our leadership and impact.
Case Study: September 2026
AJC’s Brewarrina Sports Centre Rethinks how we Build in Outback Australia
A place of gathering The Brewarrina Multipurpose Sports Centre is a very special project for a town of approximately 700 people in a remote part...
In the Media: September 2026
Jacobs House Revisited in Houses Magazine
As a founding partner of AJC, Russell played an important role in shaping the practice and its early body of work. Jacobs House is among...
Thoughts: September 2026
Beyond the Room: What Students Expect from PBSA Today
What students expect from Purpose-Built Student Accommodation (PBSA) is changing. Affordability remains critical, while location, lifestyle and opportunities to study and connect are increasingly shaping...
News: August 2026
AJC x Smeg host 2026 WAF Presentation Preparation Evening
Ahead of the 2026 World Architecture Festival, AJC and Smeg hosted our annual WAF Presentation Preparation Evening, bringing Australia’s architecture and design community together to...
Thoughts: July 2026
Why Adaptive Reuse is Re-Shaping Sydney’s Inner City
Building where the city already works Adaptive reuse allows density to be introduced in locations that are already well-connected and well-serviced. Projects like Apt.Broadway build...
News: July 2026
AJC Wins Second Consecutive NSW Enduring Architecture Award
AJC has received the Australian Institute of Architects (AIA) NSW Enduring Architecture Award for the second consecutive year, with Clubbe Hall at Frensham School recognised...
News: July 2026
AIA NSW Award Success 2026
Presented by the Australian Institute of Architects, the annual awards celebrate architectural excellence across NSW. Enduring Architecture Award Clubbe Hall, Frensham Schools Award for Sustainable...
News: June 2026
Acacia Affordable Apartments at Green Square Breaks Ground
With 264 new affordable rental apartments, the development marks a major step forward in addressing Sydney’s critical housing need. AJC’s design was selected through a...
Thoughts: May 2026
The Aged Care Sector is Changing and Design Matters More than Ever
There’s a lot happening around aged care right now. Taken individually, these changes might seem incremental: Federal funding changes. SEPP reforms. The direction of NCC2027....
News: May 2026
Eungai Creek Campus Recognised at 2026 LEAD Awards
Presented annually, the LEAD Awards celebrate excellence and innovation in the design of learning environments across Australasia, recognising projects that support meaningful educational outcomes and...
News: May 2026
The Southern Lookout Featured in Wallpaper*
A new viewing platform, the Southern Lookout, has just opened on the northern edge of Sydney. The structure, the work of local practice AJC Architects,...
News: May 2026
AJC Recognised in 2026 AIA NSW Architecture Awards Shortlist
Our shortlisted projects are: Eungai Creek Campus (Newington College) – Educational Architecture Eungai Creek Campus (Newington College) – Sustainable Architecture The Southern Lookout (Hornsby Shire...