The Calyx at the Royal Botanic Garden Sydney – a leading facility for the 21st Century unveiled

Sustainability, flexibility and inspiration were the three requirements captured, created and delivered by PTW Architects – the Royal Botanic Garden Sydney’s lead architect firm who designed the Garden’s 200th birthday masterpiece, The Calyx. Unveiled on Saturday 11 June to coincide with the Garden’s birthday, The Calyx (pron. kal-iks, def. ‘The outermost whorl of flowers’) is a world-class horticultural space that will showcase ever-changing exhibitions, launching with Sweet Addiction – the botanic story of chocolate. Designing a building for a flexible horticultural display – that can also be used as an interchangeable event space at night – set within a landscape of national historic importance, required an architectural approach that would not detract from the importance of its setting,” said Troy Uleman, Project Director of PTW Architects. “Our design concept was to create a ‘jewel in the Garden’, a serene and peaceful building, with the capacity to adapt to ever changing requirements. A building that felt like it had always been a part of the Garden and would contribute to Sydney’s life and vitality.” “It has been an exciting journey for our team. The Calyx is a very prominent building in the Garden and on Sydney Harbour. We had to get this right and I think we did – we are very pleased with the outcome. People who have visited have fallen in love with it.” Built at the site of the Arc Greenhouse in the Garden, the intelligent and sensitive architecture of The Calyx was designed for it to reinvent itself through emotive and informative exhibitions (that change every six to nine months). Working with Cockram Construction, the PTW team designed the highly flexible building using existing elements of the Arc, originally designed and constructed in 1994 by renowned Australian Architect, Ken Woolley, whilst retaining the extraordinary design quality, integrity and innovation of the existing structure. The showstopper and most visually engaging element of the building is the new Iris. The circular steel structure is the most highly visible piece of the building from afar and contains the foyer, education and retail space that can be turned into event space at night with retractable walls that allows the exhibition and event space to be combined.

PTW Architects wins Cumberland Newspaper site design

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Internationally respected architecture firm PTW Architects, in association with award-winning practice Collins and Turner and landscape architects McGregor Coxall, have had their competition design for one of Sydney’s most iconic sites - the former Cumberland Newspapers headquarters, located at 142 Macquarie Street, Parramatta selected by an independent design jury. This gateway site by Dyldam sits at the edge of the CBD, is close to both the Parramatta River and surrounded by several significant heritage sites. Source:

The Fifth Estate | Innovation in affordable housing: Sydney’s best-kept secret

We can all learn from the wealth of wisdom and range of solutions in the model affordable and social housing of the past 100 years. Discover more in our opinion piece:

PTW’s design and interiors work now on show @PolyHorizon

Poly Horizon
Setting the scene for a new era in Epping in what will be one of Epping’s tallest residential towers. ‪ For further information:

Chinese Group Launches New York Styled Apartment Project in North Sydney

North Sydney will get its own taste of New York lifestyle with a stunning new residential project – The Miller. Designed by world renowned architects PTW, the designers of the famous Water Cube Aquatic facility for the 2008 Beijing Olympics as well as Sydney’s Barangaroo, The Miller is the first residential project by the Yuhu Group. Source:

Indigenous Summer School Programme

Indigenous Programme
Angus Stevens and Mona Chao from our Sydney office were fortunate enough to be involved with the Indigenous Summer School Programme at the University of Sydney. This programme encourages year 11 and 12 Aboriginal and Torres Strait Islander students to pursue a career in architecture by way of a design exercise. The students learned some of the basic skills needed to draw plans and sections before embarking a model of their design.


PTW Architects' Sydney office will close for the Christmas period on 24 December 2015 and reopen 7 January 2016.  We wish you a safe and happy festive break!

Revy C Residential Redevelopment

Congratulations to our client, @AqualandAus ... Thirty-six of the 44 units in the historic Revy building in Pyrmont – once a top-secret naval research lab – sold by lunchtime on Saturday. A fantastic result!
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