KA01 is a villa located in the Vogelwijk district of The Hague. This neighbourhood was developed in the 30’s and is now, due to its extraordinary architectonical qualities, under municipal protection. Therefore any changes to the outside appearance of the buildings must be agreed with the municipality. That is the reason for the design of the roof extension, which in its form and materialisation does not distinguish itself from the original building. We also provided the entire home with a new interior design, completely in keeping with the 1930s style.