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ALTSTADT office for architecture 
T +32 (0)2 828 01 64
office@altstadt.brussels
Kunstlaan 1-2 Avenue des Arts, bus 7
1210 Sint-Josse-ten-Noode, Brussels
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︎︎︎ Download︎ our yearbook, edition 2021 


Vacancies


We’re always interested in spontaneous applications. We value bilingualism, +5 years of experience, and a strong interest in heritage—or a heritage diploma—as definite pluses.
Send your portfolio to hr@altstadt.brussels




Lectures


  • Jan. 2025: Bauhaus-universität Weimar: Sprechen über Architektur, Jan de Moffarts, Altstadt: ‘Heritage as a design matter’.
  • Mar. 2024: Paradisopraat: “URA+ALTSTADT: Herbestemming als motor voor nieuwe stedelijkheid”, at the Thomas More Hogeschool, Mechelen. 
  • Sept. 2023: “Building Pedagogy” talk in Liège, about our project for the renovation of the ULiège faculty.
  • Nov. 2022:  Rotterdamse Academie van Bouwkunst, about designing with heritage. Studio  Like Bijlsma en Tim Peeters
  • Jul. 2022: Gare Maritime visit with SO:Gent
  • Jun. 2022: Seminar Brussels: A case study for the sustainable city. Invited by A+ arch@work
  • Nov. 2021: “Ceci est une restauration”, Restauratie & Monumentenzorg UAntwerpen
  • 2021: METRES CARRES lecture for bru:tecture - rewatch the lecture here
  • 2021: ACROSS lezing for A+, 23/3/2021 - rewatch the lecture here
  • 2020: TaDa toekomstatelier Workshop with Willem Jan Neutelings for children of Molenbeek at the Gare Maritime. 
  • 2020: Arcadia Patrimoine Industriel Revisité Visite avec expert La Gare Maritime
  • 2020:  Korei Trek erop uit in Brussel De Gare Maritime Tour & Taxis
  • 2019: Archiweek.  Guided visit to the Gare Maritime 
  • 2019: Impossible Talks. Roundtable at the start of the exposition “Impossible Design” Musee du design ADAM Bruxelles
  • 2019: Book launch A+278 Geleide rondleiding in de Gare Maritime.
  • 2019:  Brussels Biënnale of Modern Architecture Architects' houses. Nieuw woonplezier in een 19dee Eeuws pand Raadstraat Elsene. met Evelyne Van Haverbeke
  • 2018: Guest lecture BRU.S.L.XL studio @ Sint-Lucas Brussels
  • 2018: Restauratie en Meesterschap. Lecture for Archipel, Filmplateau Ghent.
  • 2017: Guest lecture on applications of concrete in restauration. University Hasselt, Faculty of architecture.
  • 2016: Brussels Biennale of Modern Architecture.
  • 2016: Brussels Biennale of Modern Architecture. Rondleiding door de Noord zuidverbinding, central station en het RTT gebouw
  • 2015: Seminar Circular Building Design, group Transform VUB.
  • 2015: Lecture at architecture week, faculty of architeture at VUB Brussel
  • 2014: Invited workshop regarding  “Postwar building materials” by VUB / WTCB.
  • 2014 Lecture at “I Am Architect”: on the project “Ieder Zijn Huis”. 




Exhibitions






Publications







Awards


  • Dezeen Awards 2021 - Gare Maritime nominated in the category Rebirth Project
  • Brussels Architecture Prize 2021 - shortlisted in category Major Intervention
  • MIPIM Awards 2021 - laureate Special Jury Award for Gare Maritime
  • Europa Nostra - European Heritage Award for Gare Maritime
  • Belgian Building Award - Utility for Gare Maritime
  • Honorable Mention - Belgian Building Award - Circular Building for Gare Maritime
  • First Prize - Belgian Timber Award (BTCA) - Non-residential for Gare Maritime
  • Nominated - Real Estate Society (RES) Award 2020 for Gare Maritime
  • Nominated - Mies Van der Rohe Award 2022 for Gare Maritime
  • First Prize - Most Innovative Heatpomp for Gare Maritime
  • Finalist - ULI Europe Award for Excellence 2021 for Gare Maritime

ALTSTADT


... is an architectural studio based in Brussels, led by Jan de Moffarts and Steven Bosmans. ALTSTADT seeks to combine its specific know-how in the restoration, reconversion and re-activation of historical buildings, with its search 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 and studies of all sizes and origins in Brussels and beyond, notably the restoration and extension of a social-cultural centre in Antwerp, the refurbishment of an office complex in Brussels, the reorganisation of accesses to the Tour & Taxis park, the restoration of a castle near Namur,  the reconversion of the Vynckiersite in Gent and the competitions for several cultural centres in Brussels. Collaborations with other practices, such as URA, NWLND, OUEST, 51N4E, NU, ORG PER MOD, OFFICE KGDVS,…, 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.



Projects


  • Waterloo 115 - Reconversion, Brussels (BE). Competition project, 2025.
  • Districtshuis Borgerhout - Restoration, Antwerp (BE). Under development, 2025 - ...
  • Trèves-Belliard - Reconversion, Brussels (BE). Under development, 2024 - ...
  • Palmerston - Reconversion, Brussels (BE). Competition project, 2024.
  • Science 11 - Reconversion, Brussels (BE). Ongoing (building permit), 2024 -...
  • CityForward - Historical study, Brussels (BE). Completed, 2024.
  • Château Béemont - Reconversion, Ouffet (BE). Ongoing (building permit), 2024 - …
  • Residence Beaulieu - Reconversion, Brussels (BE). Competition project, 2024.
  • Louiza 183-185 - Restoration & Reconversion, Brussels (BE). Competition project, 2024.
  • Stadspark Leuven - Restoration & Reconversion, Leuven (BE). , Competition project, 2024.
  • Wauterssite - historical study, Brussels (BE). Completed, 2023.
  • SMAK - New construction, Ghent (BE). Competition project, 2024.
  • Kasteel den Brandt - Renovation, Antwerp (BE). Under development, 2023 - ...
  • Ancienne Belgique Garden Canopy - New construction, Brussels (BE). Under development, 2023-...
  • Marie Thumas - Historic study, Leuven (BE). Complete, 2022-2023.
  • Interescaut - Masterplan and reconversion study, Schelle (BE). Complete, 2022 - 2023.
  • Madou apartment - Renovation, Brussels (BE). Completed, 2023-2024.
  • Maison Devalck - Restoration & Extension, Brussels (BE). Under development, 2022-...
  • WKO Immobilie - Renovation, Brussels (BE). Completed, 2022-2024. 
  • Sint-Martinus church - Reconversion, Gooik (BE). Ongoing (building permit), 2023-...
  • Sint Andries - Reconversion, Antwerp (BE). Under development, 2023-...
  • Kunstlaan 1 - Renovation, Brussels (BE). Completed, 2022-2023.
  • Le Cabanon de Florenville - New construction, Florenville (BE). Ongoing (adjudication), 2022-...
  • Nyugati Station - Reconversion, Budapest (HUN). Competition, 2022.
  • De Munt - Restoration, Brussels (BE). Under development, 2022-...
  • ULiège - Renovation and extension, Liège (BE). Competition, 2022. 
  • OCMW Elsene - Masterplan, Brussels (BE). Completed, 2022-2024.
  • Atlas Brewery - Historic study, Anderlecht (BE). Complete, 2021.
  • Student square -  Reconversion, Brussels (BE). Competition, 2021.
  • Dry Docks - Masterplan, Antwerpen (BE). Competition, 2021.
  • L'église performante - Reconversion, Brussels (BE). , Under development, 2021-…
  • Movy Club - Renovation and extension, Forest (BE). Competition, 2021.
  • Studio KS - Renovation, Schaarbeek (BE). Completed, 2021.
  • Bains de Bruxelles - Renovation, Brussels (BE). Competition, 2021.
  • Sint-Audomaruskerk - Renovation and extension, Bissegem (BE). Competition, 2021.
  • Arsenaalsite Gentbrugge - Masterplan, Gentbrugge (BE). Completed, 2021.
  • Zusters van de Visitatie - Study, Kraainem (BE). Terminated, 2021.
  • Rue de la Cigogne - Renovation, Brussels (BE). Under construction, 2021-…
  • Sint Martinuskerk - Conversion, Burcht (BE). Competition, 2021.
  • A thousand plateaus - Reconversion, Ghent (BE). Competition project, 2022.
  • Aarlen Trier - Renovation & Extension, Brussels (BE). Competition, 2021.
  • Citadel Diest - Restoration & Masterplan, Diest (BE). Under construction, 2021-…
  • Maison Campioni - Restoration, Brussels (BE). Ongoing (building permit), 2020-...
  • De Roovere Machtens – Feasibility study, Brussels (BE). Competition, 2020.
  • Frederik Lintsstraat - Renovation, Leuven (BE). Under construction, 2020-…
  • Vynckiersite - Masterplan, Historical study & Reconversion, Ghent (BE) . Under development, 2020-...
  • Pastorie Perk - Renovation and conversion, Perk (BE). Studies complete, 2020 - 2021.
  • Château de Falaën - Renovation & Study, Falaën (BE). Under construction, 2020-…
  • National Bank – Historical & feasibility study, Brussels (BE). Completed, 2019 - 2020
  • Castle of Bouchout - Renovation, Meise (BE). Under construction, 2020-…
  • Boiler Room – Renovation & extension, Meise (BE). Competition, 2020.
  • Parc access - New construction, Brussels (BE). Completed, 2018-2023.
  • Botanique – Refurbishment, Brussels (BE). Competition, 2020. 
  • Brouckere – Historical study & valuation, Brussels (BE). Completed, 2019
  • Bollinckxbridges - Restoration, Anderlecht (BE). Under development, 2019-…
  • Waterfordstreet - Renovation, Antwerp (BE). Completed, 2021-2023.
  • Maison du Peuple – Community centre, Anderlecht (BE). Competition, 2020.
  • Terras Hotel de la Poste - New construction, Brussels (BE). Under construction, 2019-...
  • Castle Canopy– Feasibility study, Alden Biesen (BE). Completed, 2019 - 2020.
  • Maison Cascade - Renovation, Brussels (BE). Under development, 2021-...
  • Kaaitheater – Theatre transformation, Brussels (BE). Competition, 2019
  • Maison Mosane – Reconversion, Namur (BE). Project, 2019.
  • House Tienen – renovation, Tienen (BE). Under development, 2019 - …
  • Maison des Amis – Refurbishment project, Overijse (BE). Project, 2019.
  • Cité Moderne - Renovation, Brussels (BE). Competition, 2019.
  • Terrace – Reconversion, Brussels (BE). Under development, 2019 - …
  • Hangard Siccard - New construction, Merchtem (BE). Project, 2018-…
  • The painter's house - Renovation, Schaarbeek (BE). 2018, Completed.
  • Design Museum – Extension, Ghent (BE). Competition, 2018
  • Rectory & Pavilion - Restoration & New construction, Merchtem (BE). Completed, 2018 - 2023.
  • House Bockstael - Renovation, Brussels (BE). , Completed, 2018-2019.
  • Literature Hotel - Restoration, Antwerp (BE). Competition project, 2018.
  • World Trade Centre – Historical study, Brussels (BE). Completed, 2018.
  • Floralies + ICC - Study, Renovation & Restoration, Ghent (BE). Under development, 2019.
  • Belvdère - Renovation, Koekelberg (BE). Completed, 2017-2024.
  • Petite Senne - Reconversion, Molenbeek (BE). Competition project, 2017. 
  • Kanal Centre Pompidou – Reconversion, Brussels (BE). Competition, 2018.
  • Kunstacademie Zwevegem – New academy project, Zwevegem (BE). Competition, 1st Prize, 2018
  • Cadixklooster – Historical Study, Mechelen (BE). Competition, 2017.
  • Zeewezengebouw – Reconversion, Ostend (BE). Competition, 2017.
  • Victor Boin – Restauration, Brussels (BE). Competition, 2017
  • Small apartment - Renovation, Brussels (BE). Completed, 2016-2017.
  • Vioolatelier - Renovation, Wemmel (BE). Completed, 2017-2019.
  • Groepspraktijk Blink - Renovation, Leuven (BE). 2016-2017, Completed.
  • Gare Maritime – Renovation, Brussels (BE). Built, 2016 - 2020.
  • Hotel de la Poste – Reconversion, Brussels (BE). Built, 2016 - 2019.
  • Escherhouse – House transformation, Brussels (BE). Built, 2015 - 2019.
  • Stepped house –  Renovation, Leuven (BE). Built, 2015 - 2020.
  • Het Schip – Restauration & Reconversion, Hoegaarden (BE). Built, 2014 - 2019.
  • Garden house – Renovation & extension, Leuven (BE). Built, 2014 - 2017.
  • Aigle - Renovation, Brussels (BE). Completed, 2018-2023.
  • Hill House – New construction, Duisburg (BE). Built, 2010 - 2012.



Directors


Jan de Moffarts
ir architect
+32 486 88 53 36
jan@altstadt.brussels

Steven Bosmans
ir architect
+32 486 10 47 00
steven@altstadt.brussels


Jan de Moffarts (°1980) studied architecture at Ghent University and specialised in urban planning at KU Leuven. He began his career at Stéphane Beel in Ghent before working as a project manager at Origin Architecture & Engineering. In 2016, he founded his own practice, JDMA, launching with the Gare Maritime project on the Tour & Taxis site. Beyond his office, he has been a practitioner at VUB, KU Leuven, and Sint-Lucas in Brussels and Ghent, frequently participating in juries and guest lectures. He is also a member of the Royal Commission for Monuments and Sites in the Brussels-Capital Region and serves as a director for Renovas.

Steven Bosmans (°1983) studied architecture and urban design at Ghent University. From 2007 to 2018, he was a principal at OFFICE Kersten Geers David Van Severen, overseeing projects of varying scales. In 2018, he partnered with Jan de Moffarts, bringing his expertise in contemporary design and urban development. Alongside his practice, he taught architectural design at UGent and is actively involved in academic discourse through juries and lectures.

 

Collaborators



Michael Langeder
M. Arch
mike@altstadt.brussels

Clément Guérard-Ortelli
M. Arch
clement@altstadt.brussels

Zeynep Topcu
M. Arch
zeynep@altstadt.brussels

Elisabeth De Clercq
M. Arch
elisabeth@altstadt.brussels

Griet Bronselaer
M. Arch, M.Sc Conservation of Monuments
griet@altstadt.brussels

Jascha Moors
M. Arch
jascha@altstadt.brussels

Willem Willems
M. Arch
willem@altstadt.brussels

Tom Van Genechten
M. Arch
tom@altstadt.brussels

Vinny Elzewijck
M. Arch, M.Sc Conservation of Monuments vinny@altstadt.brussels

Louise Blancquaert
M. Arch
louise@altstadt.brussels


Former collaborators


Ivana Vasilijevic
Phaedra Berkvens
Albertina De Pelsmacker
Thibaut Boidin
Kjell Keymolen
Rutger Vanhoef
Karen Vannieuwenhuyze
Renata Radovanovic
Marie Porrez
Clémence Marchal
Fatme Hassan
Nadia Buelli
Tristan Leduc
Gabriel Vives
Maria Lahni
Dilara Tuygar


© 2025 ALTSTADT