Cat­ja de Haas Archi­tects spe­cialis­es in hous­ing but looks at archi­tec­ture on all scales: from prac­ti­cal ideas to abstract con­cepts and from pieces of fur­ni­ture to urban plans and com­mu­ni­ty art installations. 

A project is always con­sid­ered in its con­text: we close­ly involve the client in the process in order to come to a bal­anced, orig­i­nal pro­pos­al. We con­sult and dis­cuss ideas as well as make com­plete pro­pos­als for all stages of the build­ing process. If part of a project is out­side of our exper­tise, we col­lab­o­rate with oth­er prac­tices. We make build­ings that are a plea­sure to use, have lit­tle impact on their envi­ron­ment and can help mak­ing exist­ing build­ings more sustainable. 

The office also runs a not for prof­it com­mu­ni­ty arts project: the Giant Dolls’ House Project which empha­sis­es the need for a home and com­mu­ni­ty for all. Through the dolls’ house project we have dis­cussed hous­es and homes with an enor­mous range of peo­ple. The project can be used in a con­sul­ta­tion process. 

The office is BIM ready. 

Catja de Haas


Catja, PhD, RIBA, qualified as an architect at Delft University under Professor Herzberger. She also holds an MA in housing and Urbanism from the Architectural Association in London. Prior to setting up on her own she worked for Itsuko Hasegawa in Tokyo and Alsop Architects in London. Between 2000 and 2005 she ran a practice, Studio CS, with Sabina Riss.

The home in miniature was the topic for her PhD by architectural design (supervisors Prof Jonathan Hill and Christine Hawley) which she finished at Bartlett school of Architecture, UCL, in 2013. The Giant Dolls’ house project is the result of her ongoing research into the use of imagination and miniature to explore the ideas of home and community and as tools to bring about change. Catja has exhibited her own work and has presented her work at conferences and universities. She has been a visiting lecturer and crit at various universities.

Sophie Walker

Architectural Assistant

Sophie obtained her MA in Architecture at The Cass, London Metropolitan University and her BA at Oxford Brookes University. She has worked at De Rosee Sa Architects and Matheson Whiteley where she worked on residential and refurbishment projects and a community pavilion in London. She has been working with Catja de Haas on the Giant Dolls’ House Project since the start of 2018 and is also part of a small team compiling a book of essays and work on the Courtier Houses and Soviet social condensers.