Yvelines · Île-de-France · 437,433 residents · Chair: Cécile Zammit-Popescu
Communauté urbaine Grand Paris Seine et Oise
€273.4 million spent in 2025.
€625 per resident · Urban communities: €926
What Communauté urbaine Grand Paris Seine et Oise spends, by policy
The 4 other items (3%)
Source: 2025 accounts of Communauté urbaine Grand Paris Seine et Oise (DGFiP), by public policy.
Suppliers and recipients
The same €273.4M, by recipient.
Source: 2025 accounts of Communauté urbaine Grand Paris Seine et Oise (DGFiP).
Investment and works
€97.7M of capital spending in 2025 (building, renovation, equipment), €223 per resident. Urban communities: €234.
Click a building site to see the contract
- Travaux de renforcement de structures de chaussées par des techniques bas carbone…2024 · 2 companies€6M
- Travaux dévoiement réseaux humides poissy & acheres2024 · Sade - Compagnie Générale de Travaux Hydrauliques€2M
- Remplacement du groupe froid dans les locaux administratifs situés à Carrières-sous-Poissy2023 · Cpe Maintenance€930k
- Remplacement et la mise en conformité de deux postes de transformation HTA/BT…2023 · Eiffage Énergie Systemes - Ile de France€106k
- Travaux de désamiantage et démolition au CTC de Meulan-en-Yvelines2023 · Melchiorre S.A.S.€70k
Largest works contracted since 2023, among published contracts. Amounts planned at signature, often spread over several years.
On top of that, €10.3M paid to other bodies for their own equipment (towns, intercommunalities, associations…).
Source: 2025 accounts of Communauté urbaine Grand Paris Seine et Oise (DGFiP), by public policy.
Revenue and financing
Revenue: €258.7M · borrowing: €2.3M · spending: €273.4M.
Source: OFGL, 2025 accounts of the main budget.
Debt and taxes
€295 of debt per resident
Urban communities: €1,386
1.4 year of savings to repay it
€91 of local taxes per resident
Urban communities: €120
2025 accounts. Debt and taxes: OFGL, consolidated (main and side budgets). Per resident: amount divided by the population (Insee). “Urban communities”: median of the 14 urban communities.
The levels above Communauté urbaine Grand Paris Seine et Oise
Spending per resident in 2025, and what each level pays for.
- IntercommunalityCommunauté urbaine Grand Paris Seine et OiseWaste, water, urban transport, economic development€625
- DépartementYvelinesMinimum income, elderly and disability care, middle schools, county roads€1,045
- RegionÎle-de-FranceHigh schools, regional trains, training, business support€459
Each row: the body’s own spending per resident, the figure at the top of its page (DGFiP). Not to be added up: a grant from one level is spent by another.
Who is part of Communauté urbaine Grand Paris Seine et Oise
Understanding these figures
Who does what
The intercommunality collects and treats waste, often runs water and sanitation, organises urban transport, and pays part of its revenue back to its member towns.
Why the levels are not added up
The same euro can appear twice: once when a region or a département pays a grant, again when the town spends it. Each page shows its own body’s spending.
Where these figures come from
Spending: the accounts of the main budget published by the DGFiP, by public policy. Revenue, debt and taxes: OFGL. Contracts: published contract data (DECP), amounts planned at signing.
Do you work for Communauté urbaine Grand Paris Seine et Oise, or sit on its council? A figure to correct, context to add: write to us.
Page edited by Qipu, independent of Communauté urbaine Grand Paris Seine et Oise · Sources and method
Accounts 2025 (DGFiP, OFGL). The method · See the source