The  head office of Passivhaus Australia has been established in the small country town of Macclesfield in the Adelaide Hills.


With Passivhaus certified specialists in energy efficient design and materials, engineering, Building Biology and construction management, we can help you build a business case for projects that deliver short and long-term environmental, social and financial benefits.




Bernward Bücheler

Director design, research, facilitation

Bernward draws on a long and rich experience of 'hands on' building with many different materials.  Restoring and exploring traditional buildings he has acquired an extensive knowledge in many disciplines.

Passionate about timber, he regularly updates his knowledge with the newest developments in timber construction in Germany and Switzerland.

This provides us a rare overview of many traditional and modern building styles, materials and methods, allowing us to choose the right combinations for any customer, site, function and size of building.

Geraldine Petit

Principal project designer

Master of Art in Architecture EPFL

Polytechnic School of Lausanne Switzerland 


Since 2007 Geraldine has practiced in  sustainable integrated designs from interiors to urban scale developments.



Stina is a certified Passivhaus Designer. She has worked for 3 years on Swedish Passivhaus designs.

She brings a wealth of knowledge in sustainable timber construction and engineering to our team.

Julian Bücheler

Site manager

Trade Certificate Carpentry and Joinery

Certificate 4 in Building and Construction 


Regular overseas training has given Julian advanced experience in newest trends in mass timber construction and Passivhaus building practices.

Pauline Moy

Office manager

Bachelor of Laws & Legal Practice (Hons)

Bachelor of Behavioural Science (Psychology) and

Diploma of Occupational Health & Safety


Pauline ensures that the office runs smoothly, that we all fulfill our legal obligations and that Work Health Safety guidelines are followed.

Anna Carton

Principal Passivhaus designer

Interior design

MSC Architecture BA (Hons)   PHI Certified,

Interior Design 


Anna is highly experienced and successful as a Passivhaus designer in England and Australia. Her experience is invaluable for the growth of the Passivhaus movement in Australia.    

Urs von Arx

Site manager

Urs has a long experience overarching many disciplines.

His training in Passivhaus-related tasks, like insulation and airtight construction, makes him the ideal manager on complex Passivhaus building projects.

Stina Nygren

Structural engineer and

Passivhaus designer


Carolina Santos

Master in Energy and Environmental Engineering Lisboa, Portugal



Carolina's special skills include sustainable building, renewable energy systems integrated into buildings, air conditioning/ventilation projects, energy certification and building's optimization.


She advises in most energy sufficient use of building elements  and calculates or  dimesions renewable energy systems  for offgrid and or gridconnected use.