Office Spaces
In A New Light
Step inside Ecla, a radiant force of energy in Brussels. On the corner of Rue Belliard and Rue de Trèves the light leads the way throughout this office building, where workflows move as freely as the light does.
The ECLA project consists of the integration and refurbishment of the Trève 74 building, BRUSSIMMO (designed by SAMYN and PARTNERS architects & engineers, 1989), and the Belliard 68 building (designed by A. and K. Polak, 1972), by ALTSTADT, NWLND, Jeroen Provoost and JASPERS-EYERS Architects.
Rue Belliard, 68 - Rue de Trèves, 74 - Brussels
Architectural Vision
The architectural interventions are summarized and presented according to four key guiding principles
Enhancing the existing structure
Active and permeable ground floor
The extension as an urban balcony
The garden as a unifying element
About The Building
Located at 68 Rue Belliard and 74 Rue de Trèves, this property occupies a prime corner in Brussels’ European Quarter, just steps from the main EU institutions, offering excellent visibility and connectivity.
The ECLA project consists of the integration and refurbishment of the Trève 74 building, BRUSSIMMO (designed by SAMYN and PARTNERS architects & engineers, 1989), and the Belliard 68 building (designed by A. and K. Polak, 1972), by ALTSTADT, NWLND, Jeroen Provoost and JASPERS-EYERS Architects.
The redevelopment will introduce residential, retail and amenities, reduce the building footprint to create more green space, and transform underused areas such as underground parking into adaptable, high-value spaces—supporting a more vibrant and sustainable European Quarter.
Heritage Structure,
Future Performance
Function Breakdown
Sustainability Features
BREEAM OUTSTANDING
ensuring very high environmental performance through reduced energy demand, renewable energy integration, low-carbon materials, responsible water and site management, and rigorous commissioning with operational monitoring via the BMS.
WELL GOLD
placing user health and well-being at the centre through high indoor air and light quality, thermal and acoustic comfort, and low-emission materials.
The Building Timeline
2024-2025
Permit introduction
11/07/2025
2025-2027
Permit expectation
30/06/2026
2027-2029
End of Works
01/12/2028
Discover ECLA
Experience how ECLA reflects a new rhythm in Brussels’ European District.
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