Uccle: very good transparency, largest municipality by area

The largest municipality by area

Uccle is the largest municipality in the Brussels Region by area (22.9 km²) and the fifth by population (nearly 87,000 inhabitants). A residential and green municipality, it is governed by a renewed MR-DéFI + Ecolo-Groen coalition.

Transparency: 5 out of 6 criteria

Uccle achieves a very good score. The budget and council minutes (with dedicated archives) are published online, the council is broadcast via livestream on YouTube, the mandate registry is accessible, and the municipality runs a participatory budget of EUR 150,000 via the MonOpinion platform. Only the Open Data portal is missing.

Citizen participation: MonOpinion

Uccle uses the MonOpinion platform (based on Decidim) for its participatory budget of EUR 150,000, allowing citizens to propose and vote on improvement projects for the municipality.

Recent developments

The property tax (PRI) has been raised from 2,940 to 3,400 additional centimes. The PFAS contamination at the Sicli site (Chaussee de Neerstalle 430) remains a major issue: a 100-metre safety perimeter has been in place since September 2025 (see PFAS dossier). A collaboration project with the municipality of Linkebeek is under consideration.

Tram 82 extended to the Dieweg (7 June 2026)

From Saturday 7 June 2026, tram 82 runs again via rue de Stalle and square Marlow and is extended to the Dieweg, following works on rue de l'Etoile. Uccle is now directly connected to Brussels-Midi station.

Source: BX1 (7 June 2026).

CetteFamille — first shared housing for elderly in Belgium (June 2026)

The first shared housing for elderly people in Belgium has opened in Uccle. This model, developed by CetteFamille, combines autonomy with home care support, as an alternative to traditional care homes. Iriscare management visited the facility, signalling institutional interest in this model within the Region's elderly care policy.

Source: Iriscare (3 June 2026).