Yvelines · Île-de-France · 437,433 residents · Chair: Cécile Zammit-Popescu

Communauté urbaine Grand Paris Seine et Oise

€274.1 million spent in 2025.

€627 per resident · Urban communities: €933

What Communauté urbaine Grand Paris Seine et Oise spends, by policy

Streets and transport25%€68.5M
Town planning and housing21%€56.7M
Administration and shared services20%€53.9M
Bodies do not all file the same costs here: some put all their staff under it.
Culture, sport and youth10%€28.3M
Waste, water and environment7%€20.2M
Public safety6%€17.3M
Economy and trade5%€12.4M
Loans: repayments and interest3%€8.2M

The 4 other items (3%)

Health and social care< 1%€439k
Education< 1%€47k
Passed on to other bodies1%€3.8M
Not assigned to a policy2%€4.3M

Source: 2025 accounts of Communauté urbaine Grand Paris Seine et Oise (DGFiP), by public policy.

Suppliers and recipients

The same €274.1M, by recipient.

Companies and contractors58%€159.2M
See the names ↓
Staff20%€54.1M
Pay and contributions.
Grants and contributions8%€21.2M
Compulsory contributions6%€16.8M
Banks and lenders3%€8.2M
Joint bodies and syndicates1%€3.8M
Benefits paid to people< 1%€35k
Other4%€10.7M
Councillors’ allowances, taxes paid, other costs.

Source: 2025 accounts of Communauté urbaine Grand Paris Seine et Oise (DGFiP).

Contracts state a maximum amount for their whole term, often several years. That amount differs from what was paid. Purchases, services and works paid to companies by the intercommunality in 2025: €159.2M (its accounts).

3 contracts signed in 2024 · €14M before tax · no contract published since 2024

Why this total differs from the €159.2M of purchases, services and works paid to companies

These are the amounts of the contracts signed in the year, over their whole length, not what was paid. The money paid in a year also goes to older contracts and to purchases too small to be published (under €40,000 excl. VAT). For a framework agreement, the amount is a ceiling.

Investment and works

€97.2M of capital spending in 2025 (building, renovation, equipment), €222 per resident. Urban communities: €233.

Click a building site to see the contract

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: €274.1M.

Breakdown of resources

Taxes (business and household taxes, VAT share)48%€130.6M
State and other contributions24%€65.5M
Capital receipts: grants for works, VAT refunds, sales of property…16%€44.4M
Users and rents4%€12M
Other receipts2%€6.2M
Borrowing1%€2.3M
Drawn from reserves5%€13.1M

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
€627
DépartementYvelinesMinimum income, elderly and disability care, middle schools, county roads
€1,057
RegionÎle-de-FranceHigh schools, regional trains, training, business support
€465

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.

Official table of responsibilities (July 2025)

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.

Elected officials and staff of Communauté urbaine Grand Paris Seine et Oise: to report a figure to correct or add context, write to Qipu.

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