Submit your project for Archello Awards 2025 now! Deadline 30 September 2025
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Deadline 30 September 2025
Cohousing De Sijs
Stijn Bollaert

Cohousing De Sijs

Applied products
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An ideal balance between privacy and collectivity, with a strong link to the neighbourhood and a vast diversity in inside and outside spaces were the main objectives for this project, aiming for the highest possible living quality.

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

A cohousing project is in many ways different from a standard housing project. Collective and personal interests must go hand in hand at all times. To achieve this, the future inhabitants were involved in the design process from a very early stage, enabling them to participate in the design process, but also confronting them with the impact of personal choices on the project as a whole.

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

Three separate building volumes are connected by an L-shaped circulation axis, along which the entrances to the flats and the collective spaces are located. This maximizes the chances of meeting each other and strengthens the collectivity.

The old cafeteria named "De Sijs", a listed 18th-century building at the centre of the circulation axis, is the main entrance to the project and contains a collective dining space with kitchen, a cosy living space, a fully equipped guest stay, an atelier and a coworking space, becoming the inviting face to the project and the beating heart of the collective life.

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

Along the circulation axis, a (still growing) plant curtain offers privacy towards the street, creating an inviting space for spontaneous talks with the other inhabitants, in a green and flowery environment.

A generous terrace, linked with the collective dining space, leads to the south-oriented garden via an organic staircase, creating a soft gradient from a mineral surface to the lush green. A place away from the hustle and bustle of the street in front, a secluded and wonderful setting to relax, meet and play. 

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

The natural height difference on the site is used to create an open parking level, connected to the collective outside space. This increased the usability of the space drastically, not only providing easily accessible space to park cars and bikes, but also offering multifunctional covered outside space, in direct link with the garden.

The individual housing units, going from compact studios to three bedroom-duplexes, host a very diverse group of inhabitants. All units are fully equipped and have bright and spacious living spaces linked to a generous private terrace on the sunny garden side, finding the perfect balance between the collective life and well-needed privacy.

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

The housing buildings are constructed with a skeleton structure of wooden beams and columns, insulated with cellulose insulation, and cladded with cork panels, an in Belgium unknown, but very versatile material. The cork panels, compressed leftovers from the cork industry, are water resistant, breathable, thermically insulating and rot resistant. Because of their high density, they also buffer sound better than traditional facade insulation and protect the building from overheating. Being a natural product, the heterogonous colour gives the building a warm and soft touch.

photo_credit Stijn Bollaert
Stijn Bollaert
photo_credit Stijn Bollaert
Stijn Bollaert

Team:

Architects: OFFICEU architects

Structure Engineer: ORCA

Engineer Soil Stability: Tecon

Technical Engineer: Studie10

Acoustics: bureau de Fonseca

Photographer: Stijn Bollaert

Caption
Caption

Materials Used:

Facade cladding:

Cork, ICB insulation cork board, Sofalca

Bricks, Toscane WF50, Vandersanden

Limewash, Anc. Ets Stoopen & Meeus

Windows & Doors: Wood, Lariks, Baens

Interior lighting: Technolux, Cebeo

Caption
Caption

Project credits

Architects
Structure Engineers
Photographers
Technical Engineer
Engineer Soil Stability

Product spec sheet

Floor insulation
Wood fibre plate
iQ3-cellulose CELIT 18S by ISOPROC
Roof insulation
Bricks
Toscane by Vandersanden
Perimeter insulation
READY T4+ by Foamglas
Insulation

Project data

Project Year
2021
Applied Products
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