The interests of a sizeable group of architects in Poland from around the mid-1920s onwards was synonymous with the most progressive activities of the European avantgarde. The local modernist community was centred around the art groups ‘Blok’ and ‘Praesens’. The activities of the Polish avant-garde resulted in the inclusion of its representatives in the CIAM working group, which allowed for the international dissemination of the activities of Polish artists. The activity of a group of Polish modernists was also the reason for the spread of avantgarde architectural ideas in Poland. Parallel to the activity of the avant-garde groups, there was also another group of architects active in interwar Poland, mainly of the younger generation, whose designs made clear reference to regional traditions and forms – without abandoning modern aspirations. Leading representatives of this trend included Bohdan Pniewski, Maciej Nowicki and Piotr Lubiński. The early work of Jan Bogusławski can undoubtedly also be described as moderate modernist regionalism. Drawing also on functionalism, he combined, in an original way, modern avant-garde ideas with a traditional view of the detail of utilitarian forms. This article focuses on the summer and weekend houses in the Warsaw area that were built according to his designs between 1933 and 1939, as well as their interiors and individually designed furniture that refers to the traditions of artistic craftsmanship.