Catja de Haas Architects Ltd is a small architecture practice with a keen interest in the design of houses. We  design for private as well as professional clients.  For clients who want to be involved in the process and know what they want but need professional guidance, we are happy to act as consultants and help them face the pitfalls and risks that designing and building bring.  We are also happy to collaborate with other practices. 

The office combines design and research and likes to try and find new solutions within a very old profession.  The practice runs the Collaborative Community Arts Project the Giant Dolls' House Project that creates idealised communities. Our latest project, in collaboration with T-SA, was build according to Passiv Haus Principles. 

Catja has exhibited and presented her work at the Bartlett, and has lectured at the Architectural Association and the Chelsea college of Art at the University of the Arts London. Over the years she has been a visiting critic at various schools of architecture and universities in the UK and the Netherlands and has completed a PhD by Design at the Bartlett school of Architecture at University College London. 

She grew up in the Netherlands and obtained her MSc at the Technical University of Delft in the Netherlands, where she graduated under Professor Herman Herzberger. She obtained a MA in 'Housing and Urbanism' in London at the graduate school of the Architectural Association in London (with a scholarship from Fonds voor beeldende kunsten).

Prior to setting up on her own she worked at Itsuko Hasegawa in Tokyo and Will Alsop in London.