ALTSTADT is the collaboration between JDMA and Steven Bosmans. JDMA was founded by Jan de Moffarts in 2016, with the project for the restoration of the Gare Maritime at Tour & Taxis. Since 2018, he is joined by Steven Bosmans, one of the former principals at OFFICE KGDVS, as a conclusion of a period occasional collaborations. Based at Gare du Nord they are working on diverse projects ranging from heritage reconversion to new construction.

As a collaboration ALTSTADT seeks to combine a specific know-how in the restoration, reconversion and re-activation of historical buildings, with a skill, or perhaps obsession, for methodical and conceptually precise design. Heritage, as a built presence of the collective memory and therefore essentially public space, is a central theme but not a focus. The main ambition is making spatially precise, clear, and sensible projects, independent of the origins and scope of the project, with radicality and subtlety as alternating and mutually reinforcing intentions.

Within this framework ALTSTADT is working on projects of all sizes and origins in Brussels and beyond, notably the restoration and extension of a historical rectory in Brussegem, a mixed-use complex in Merchtem, the reorganisation of accesses to the Tour & Taxis park, the restoration of a castle near Namur, and the competitions for two cultural centres in Brussels. Collaborations with other practices, such as Ouest, 51N4E, NU, Czvek Rigby, OFFICE, …, as well as with academic institutions such as KUL and VUB, are an essential part in the web of activities. In these ALTSTADT alternates between the roles of designer and advisor.