Trethowan is an architecture, interiors and heritage practice with a record of excellent projects and people.

Our Story

Founded in 2001, we are an architecture practice that engages in bespoke projects across Australia, specialising in heritage and its related disciplines.

Our People

Bruce Trethowan

Bruce is the senior practice director, and has been a practicing architect for over 40 years. Over these years he has undertaken a diverse range of projects including large office buildings, hotels, schools, apartments and individual houses. He has a deep understanding of architectural history and the Australian environment and his response to all projects is derived from this understanding and appreciation.

Mark Stephenson

Mark is the heritage practice director with a passion for heritage places and well-considered contextual design that enhances and supports these important places. He brings extensive experience and practical knowledge to Trethowan and each project. He values the importance of understanding the significance of a heritage place, and uses this understanding to collaborate with owners and experts to deliver a project that not only provides for current needs, but adds to the history of the heritage place.

Iain Nicol

Starting with Trethowan in 2007, Iain Nicol has helped to shape the direction of the firm and its architectural response to buildings within a heritage context. As the architectural practice director, he has fostered the growth and development of the passionate and talented architects and designers that form the architectural team at Trethowan. He has a contemporary approach to architecture, with a heritage sensitivity.
Our Culture

We strive to have a cooperative and comfortable working environment with staff and directors, clients and contractors treated respectfully and acknowledged for their individual strengths. This outcome is derived from an office hierarchy that is as flat as possible. We strive to attend to the personal values and aspirations of all, providing a sense of ownership and belonging.

The Christmas card

Our annual Christmas card has become a feature of the practice. Each year the card includes a tableau of the office staff and directors making a tableau derived from an important work of art. As well as Seasons greetings, the card features a notable project that was constructed over the year and recent office news.

Browse our card image gallery below, and let us know if you would like to be added to our card list.

Like to know more?

If you have any questions about how we might work together, simply drop us a line.