Aileen Sage is the alter ego of Isabelle Aileen Toland and Amelia Sage Holliday. It is a pseudonym for our partnership that includes practice, research and education in the fields of architecture and urban design.

We work for a range of clients from both the private and public sectors including the City of Sydney, the Department of Planning NSW, the Government Architect’s Office, Artbank (Federal Ministry of the Arts), the Australian Institute of Architects and Lendlease.


Isabelle Aileen Toland
Isabelle graduated from the University of Sydney with Class 1 Honours (2003). Upon completing her studies Isabelle worked for award winning practices both in Sydney and overseas, including world renowned Japanese architect Shigeru Ban in his Paris office and at Neeson Murcutt Architects in Sydney. During her time at Neeson Murcutt Architects, Isabelle was project coordinator on the Castlecrag House (AIA Robin Boyd Award 2011) and Prince Alfred Park upgrade (AIA Walter Burley Griffin Award, AIA NSW Lloyd Rees Award). Isabelle has worked on a highly diverse range of projects from the inner city to the remote outback, and often crosses disciplines to create art installations and interventions. She has taught, lectured and spoken about art and architecture at numerous institutions including UTS, the National Institute of Dramatic Arts (NIDA), the Art Gallery of NSW and Sherman Contemporary Art Foundation. Isabelle is a recipient of the Sydney University Medal, the RAIA Design Medal Commendation and the Byera Hadley Student Travelling Scholarship. Isabelle is an original design thinker with a passion for integrating cultural narratives in community place making.

Amelia Sage Holliday
Amelia is a graduate of the Architectural Association in London (2012) and the University of New South Wales (2004). Prior to co-founding Aileen Sage Architects with Isabelle Toland she worked at a number of award winning architectural practices in Sydney including Tonkin Zuilakha Greer, Architect Marshall and Neeson Murcutt Architects. Whilst at Neeson Murcutt Architects, Amelia was project architect on award winning projects the Whale Beach House (AIA Wilkinson Award 2009), Stanmore Public School Library (AIA NSW Architecture Award 2011) and the Juanita Nielsen Centre upgrade. Amelia is a registered architect in NSW and actively involved in the architectural community. She is regularly engaged in teaching and critique at all three schools of architecture in Sydney. Amelia is a recipient of the UNSW University Medal, the NSW Board of Architects Medallion, and the Dulux Study Tour for emerging architects. Amelia is a clear strategic thinker and highly experienced architect who has been involved in planning and delivery of significant private and public commissions.