Delta Tower / Floating Gardens - Brussels - Webflow Ecommerce Website Template

Delta Tower / urban mixed-use

[Summary]

Floating gardens at programmatic thresholds / biophilia between office, leisure and urban verticality.

[Team]

Sou Fujimoto Atelier Paris + AWAA

[Temporal Arc]

Immediate (biophilic contact) · Circadian (24-hour mixed use) · Chronic (urban ecological restoration)

[Direction of Effect]

RESTORE (biophilic contact) · REGULATE (urban ecology) · ENCOUNTER (24-hour neighbourhood)

[Neural Tags]

B1 = Nature views · B3 = Biophilic volume · B4 = Vertical biophilic continuity · W1 = Water proximity - Blue Mind · S1 = Social contact activation

[Biological System]

Autonomic regulation · Allostasis · Molecular signalling (serotonin, dopamine) · Neuroception

[Description]

URBAN RESPONSE In Europe, in an increasingly urban context, the question of city development is at the heart of all thinking. Whilst placing adaptive functioning and health at the outset of projects has become essential, the space given to cars is diminishing in favour of public transport and short journeys, pushing us to revisit the question of density, and genuine space is being given back to nature - reintroduced in the very places where it had been carefully managed out. We propose to give a new sensibility to the notion of urban landmark, a changing and gentle silhouette, strong and innovative, a place above all open to its surroundings and at human scale. A new symbol of 21st-century architecture, in close dialogue with nature, daring to look forward whilst respecting the existing.Delta Tower / Floating Gardens is the 1st place competition entry for the Brussels Delta mobility hub, by Sou Fujimoto Atelier Paris with AWAA. The project proposes a mixed-use tower in which floating gardens at every programmatic level transform vertical circulation into a continuous biophilic landscape. Three programme scenarios (25,000 / 35,000 / 50,000 m2 - housing, offices, hotel, and cultural) allow post-competition adjustment to market conditions, embedding flexibility into the structural logic from the outset. The Delta site - served by metro, tram, and rail - provides the urban connectivity required to activate a genuine 24-hour vertical neighbourhood. Height: up to 130 m. Brussels. BfNA reading: this project is understood as a case study in movement, orientation, accessibility, safety, social mixing and collective behaviour. It extends beyond architectural production into environmental intelligence / how design decisions can support human adaptation, social responsibility, ecological performance and future evidence-based practice.

[Key Figures]

Typology: urban mixed-use · 2018 · ~50,000 m2 (3 scenarios: 25,000 / 35,000 / 50,000 m2) · Programme: housing + offices + hotel + retail · Floating gardens integrated at each level · Height: up to 130 m · Brussels

[Neural Analysis]

BIOPHILIC INTERRUPTION: Vegetal gardens interrupt the continuous tower stack, offering sensory reset points that may reduce fatigue and support vertical orientation.

FLOATING GARDENS / BIOPHILIC [B1][B3][B4]: Vertical greenery integrated at every programmatic level. Ulrich (1984, Science) established the causal link between nature views and physiological recovery. The Tandfonline systematic review (2024, 74 studies) confirms medium-to-large effect sizes for greenery + window views of nature on stress, cognition and adaptive functioning. Elzeyadi (2011): -11% sick days, saves $2,000/employee/yr [B4]. ATTENTION RESTORATION [S2]: Kaplan (1995) ART: 20 minutes of natural-view exposure restores executive function and directed attention - precisely what a 'floating garden' terrace provides during the working day. LIGHT [L1]: South-facing glazed offices maximise morning cortisol [L1]; optimal CCT 3,500-4,000 K at 300-500 lux [L4]. VERTICAL BIOPHILIA AT SCALE [B1][B4]: Floating gardens at each level provide residents and workers with immediate biophilic contact - Yin et al. (2020): within 4 minutes of biophilic exposure, HR, blood pressure and skin conductance reduce significantly. MIXED USE reduces commute: MacKerron & Mourato (2013): eliminating the daily commute recovers the least-positive-affect measured time in human life. BfNA neural-sciences lens: the relevant question is not only how the project looks, but how it conditions movement, orientation, accessibility, safety, social mixing and collective behaviour over time, across different bodies, neurotypes and social realities.

[Social Impact]

SOCIAL: Shared gardens create non-commercial collective space within a dense tower condition.

[ROI Sustainability]

ROI: Green amenity and improved orientation enhance market value while supporting occupant regulation.

ROI: Brussels Delta site is a strategic mobility hub (metro, tram, rail). Mixed-use resilience: 3 scenarios allow programme adjustment to market conditions. SUSTAINABILITY: Floating gardens reduce runoff, urban heat island, and building energy loads. Timber-steel hybrid targets BREEAM Outstanding. THREE-SCENARIO PROGRAMME FLEXIBILITY: Adaptable programme reduces investment risk. Brussels real estate: prime CBD office rents €250-280/m2/yr (JLL Brussels, 2023). Canal-side location generates 15-25% residential premium. ESG / investment lens: the value of this project is not limited to carbon or certification. It includes public value, climate adaptation, inclusion and civic resilience, producing evidence that can inform investors, public actors, operators and future environmental standards.

[Applied R&D Lens]

Compare stress and dwell patterns at garden floors, lift cores and perimeter views.

The three-programme scenario structure provides a rare longitudinal measurement opportunity. BfNA's Applied R&D would track occupant cortisol and social contact frequency across programme layers as the building moves through its 24-hour activation cycle - correlating the mixed-use temporal rhythm with the autonomic nervous system's circadian arc. The floating gardens provide the biophilic variable: measuring the physiological impact of nature contact at each floor level, across the full occupant population, from morning to evening. A tower that generates its own longitudinal dataset - if the measurement infrastructure is built into the building from the beginning.Future data layer: deployed through BfNA, the project could become a longitudinal dataset linking environmental conditions, behavioural patterns, social outcomes and ecological performance / transforming built space into knowledge for future design.

Citations:

Sources: Ulrich (1984) Science · Tandfonline (2024) biophilic systematic review · Yin et al. (2020) Indoor Air · MacKerron & Mourato (2013) Psychol. Sci. · JLL Brussels Office Market (2023). · Ulrich 1984; Kaplan 1995; Vartanian et al. architectural preference; tower ecology sources.

Project Credits: Sou Fujimoto Atelier Paris + AWAA; Team: Sou Fujimoto Atelier Paris + AWAA.Laura Role: Laura Ulloa - Project Leader / lead responsibility where documented in CV, office records or project archive.Image Credits: © Sou Fujimoto Atelier Paris + AWAA and/or respective photographers/visualisation studios.Source: https://sou-fujimoto.net / https://www.archdaily.com/884836/sou-fujimoto-architects-and-awaa-win-competition-for-delta-tower-in-brussels.Project Credits & Copyright Notice: Every effort has been made to identify and acknowledge architects, consultants, collaborators, photographers, visualisation studios and other contributors associated with each project. Project descriptions have been rewritten and curated by Bureau for Neural Architecture (BfNA). Architectural works, photographs, renderings, drawings, trademarks and visual material remain the property of their respective authors, studios, photographers, visualisation teams and rights holders. Contributors are credited wherever information is available. Rights remain with their respective authors and rights holders.