Context and Purpose
The report “S’occuper de la vacance : La réhabilitation de la ville pour ses habitants et par ses usagers” is produced by Atelier de Recherche et d’Action Urbaines (ARAU), a Brussels‑based association founded in 1969 that promotes permanent education on urban issues, democratic participation and affordable housing. Although the authors are listed as “not named,” the organisation’s long‑standing leadership includes figures such as Marion Alecian (director since 2019), Elie Arnould (former tour manager) and a board of long‑term volunteers. The study examines the phenomenon of empty estates in Brussels and proposes public acquisition and nonprofit conversion into genuinely affordable, community‑run homes.
Key Findings on Urban Vacancy
The document highlights that a significant proportion of Brussels’ built stock remains under‑occupied, especially office buildings in the European quarter, the Nord district and former industrial sites. It quantifies the issue by noting over one million m² of vacant office space in 2024, and points out that many vacant parcels could be repurposed for residential use, reducing the need for new construction. The report stresses that re‑using existing structures aligns with climate‑friendly goals by limiting material consumption and embodied carbon.
Economic Implications
ARAU estimates that converting vacant properties into affordable housing could generate up to €136,230.58 in additional revenue for the city, representing 25.12 % of its total annual income of €542,290.08. The association also records a €4,500 budget for the specific initiative described in the metadata, underscoring modest financial resources dedicated to research and advocacy. Funding sources include the association’s own reserves, structural contracts with the regional government, and occasional project‑specific grants such as €8,000 from the COCOF for the 55th Urban School.
Social Impact and Community Benefits
The study argues that community‑run housing models enhance social cohesion, give residents a voice in management, and counteract gentrification pressures. It references past successes where ARAU’s advocacy helped preserve historic buildings, such as the former Delhaize Molière / Royal Rinking, and secured the protection of the Palais du Midi from demolition. By involving local users in decision‑making, the report links vacancy reduction to the broader right‑to‑the‑city agenda championed by the association since its inception.
Environmental Advantages
Rehabilitation of existing structures is presented as a key strategy for reducing the city’s carbon footprint. The report notes that demolitions generate substantial waste and emissions, while retrofitting buildings improves energy efficiency and preserves the historic urban fabric. It cites the association’s participation in the 2024 “Good Move” initiative, which promotes active mobility and the greening of public spaces, as complementary to vacancy reduction.
Statistical Overview
- Vacant office space (2024): > 1 million m²
- Estimated added municipal revenue from conversion: €136,230.58 (25.12 % of total)
- Funding for this study: €4,500
- Number of visits and public engagements in 2024: 275 group tours, 1,725 participants, 84 % overall attendance rate for guided tours
- Media reach: Facebook 5,240 followers, 61,000 views on top post; X 1,791 followers, 11,000 impressions on top post; LinkedIn 2,176 followers, 3,500 impressions on top post
Policy Recommendations
ARAU calls for:
- Public acquisition of vacant estates through transparent mechanisms.
- Allocation of these assets to nonprofit organisations for affordable housing projects.
- Integration of community governance structures to manage the new housing stocks.
- Alignment of regional urban planning regulations to prioritise refurbishment over new construction.
- Continued financial support from the Brussels‑Capitale Region and European partners to sustain the conversion programmes.
Conclusion for Sustainable Housing Stakeholders
The report provides a data‑driven case that addressing urban vacancy in Brussels can simultaneously deliver affordable housing, strengthen community participation, and lower environmental impact. It offers a replicable model for other European cities facing similar challenges, emphasizing modest public investment, strong civil‑society involvement, and the strategic reuse of existing built assets to achieve sustainable urban development.

