About

Trethowan Heritage is an experienced consultancy specialising in the historic built environment. We seek to understand what makes a place significant and use that insight to inform its future. Our approach is grounded in authenticity, promoting traditional craftsmanship and sustainable practices. We work closely with clients across multiple sectors, delivering tailored heritage solutions that response to the specific needs of each project.

Our Story

Founded in 2001, Trethowan Heritage began as an architectural practice delivering both architectural and heritage projects across Australia.

The practice was recognised in 2015 as a joint recipient of the Victoria Architecture Award for Heritage Architecture, and again in 2023 with the John George Knight Award for Heritage.

A new chapter began in 2025 for the practice with the architectural services concluding and the focus made exclusively on heritage consultancy - continuing our commitment to the historic built environment.

Our People
Mark Stephenson
mark @trethowan.com.au

Mark Stephenson
Director

@
Mark is the 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 Heritage and each project it undertakes. 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.
  • Janice Yeung
  • Abbey O'Regan
Our Culture

We strive to have a cooperative and comfortable working environment with staff, clients and contractors treated respectfully and acknowledged for their individual strengths. We strive to serve 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 director's reimagining of an important piece of artwork. As well as Seasons Greetings, the card features a notable project(s) that was undertaken 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.

2024 - Based on Lunch Atop a Skyscraper, 1932 photograph.
2023 - Based on The Trial, Sidney NOLAN, National Gallery of Australia
2022 - Based on A Sunday Afternoon on the Island of La Grande Jatte, Georges SEURAT, Art Institute of Chicago
Trethowan Christmas card 2020; recreation of 'Shearing the Rams', by Tom ROBERTS
2021 - Based on Shearing the Rams, Tom ROBERTS, National Gallery of Victoria
Trethowan Christmas card 2020; recreation of 'Marilyn Monroe Portfolio' painting by Andy WARHOL
2020 - Based on Marilyn Monroe Portfolio, Andy WARHOL
Trethowan Christmas card 2019; recreation of 'Collins St, 5 pm' painting by John BRACK
2019 - Based on Collins St., 5 pm, John BRACK, National Gallery of Victoria
Trethowan Christmas card 2018; recreation of 'Bushrangers' painting by William STRUTT
2018 - Based on Bushrangers, William STRUTT, University of Melbourne Art Collection
Trethowan Christmas card 2017; recreation of 'Chiryu, Station 40' painting by Utagawa HIROSHIGE
2017 - Based on Chiryu, Station 40, from the series Fifty-three Stations of the Tokaido (Gyosho Ed.), Utagawa HIROSHIGE, Nakagawa-machi bato hiroshige art of museum, Japan
Trethowan Christmas card 2016; recreation of 'The Dance Foyer at the Opera on the rue Le Peletier' painting by Edgar DEGAS
2016 - Based on The Dance Foyer at the Opera on the rue Le Peletier - Edgar DEGAS - Musée d’Orsay, Paris
Trethowan Christmas card 2015; recreation of 'Luncheon of the Boating Party' painting by Pierre-Auguste RENOIR
2015 - Based on the Luncheon of the Boating Party - Pierre-Auguste RENOIR - The Phillips Collection, Washington, DC
Trethowan Christmas card 2014; recreation of 'The Banquet of Cleopatra' painting by Gaimbattista TIEPOLO
2014 - Based on The Banquet of Cleopatra - Gaimbattista TIEPOLO - National Gallery of Victoria
Trethowan Christmas card 2013; recreation of 'The Calling of St Matthew' painting by CARAVAGGIO
2013 - Based on The Calling of St Matthew - CARAVAGGIO - San Luigi dei Francesi, Rome

Like to know more?

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

Contact us