
How to obtain rainwater management aid
Reduce at source the volume of runoff collected in networks (at least zero discharge for ordinary rainfall) by infiltrating rain as close as possible to where it falls, diffusely and at the surface (in the open). Beneficiaries indicated: businesses. Catalogue amount: a grant of up to €25/m² to €100/m² depending on the ambition of the project. The official conditions and the opening of the scheme remain to be checked.
Rainwater management aid aims to reduce at source the volume of runoff collected in networks (at least zero discharge for ordinary rainfall) by infiltrating rain as close as possible to where it falls, diffusely and at the surface (in the open); and maintain and if possible increase planted open-ground areas. To find out whether your project can benefit, first check the applicant’s profile, the nature of the costs and the funder’s conditions. The information below comes from the catalogue and flags the points to confirm before any commitment.
Funded by Agence de l'Eau Seine-Normandie
Run a personalised scan to identify the public grants and funding your company may be able to access.

Who can apply
The reference information indicates: businesses. Final eligibility depends on the territory, the applicant’s status, the activity and the applicable rules.
Eligibility conditions
The detailed conditions are not given in the conditions field of the catalogue. Before incurring expenditure, confirm with the funder the geographical scope, business criteria, sector exclusions, State aid rules and any obligation to apply before starting.
What the scheme covers
Operations or expenditure described: studies (preliminary studies for the works and project management studies) and works for: de-sealing soils by creating planted open-ground surfaces — car parks, swales, ditches, permeable roadways, etc., contributing to green corridors for better terrestrial ecological continuity; disconnecting rainwater from sewer networks and managing water through infiltration by maintaining or increasing planted open-ground areas. Have the quote and expenditure base validated by the funder; do not assume that related costs or expenditure already committed will be accepted.
Amount and funding terms
A grant of up to €25/m² to €100/m² depending on the ambition of the project. The amounts and rates should be confirmed in the official rules in force before drawing up a financing plan.
How to apply
Prepare a project description, a timetable, unsigned quotes if required, a provisional budget, the financing plan and the administrative documents. Consult the official rules, discuss the project with the reviewing department and submit the application before operations start where this rule applies. Keep the acknowledgement of receipt and wait for the award decision before committing expenditure if the rules require it.
Timeline
The catalogue entry shows the date 31 December 2030, which on its own does not prove that the aid is open or closed. Check campaign dates, any selection committees and the availability of funds directly with the funder before applying.
Key facts
- Funder
- Agence de l'Eau Seine-Normandie
- Type of funding
- Grant
- Status
- Open
- Maximum amount
- €100
- Automatically extracted — check the official source
- Minimum amount
- €25
- Automatically extracted — check the official source
- Closes
- 31 December 2030
- Geographic scope
- Not specified
Frequently asked questions
Which rainwater management works are targeted?
The Seine-Normandy Water Agency notably targets de-sealing, planted open-ground surfaces, swales, ditches, permeable roadways and disconnecting rainwater from networks.
What amount can be granted?
The official page indicates aid of €25 to €100/m² depending on the ambition of the project, for works and linked studies.
Can a study alone be funded?
Preliminary studies and project management studies can be funded when they are linked to the works concerned.
What was the application deadline for review in 2026?
The official page consulted asked for complete applications to be submitted before 30 September 2026 to guarantee review in 2026; this date has passed. Confirm the next application window and eligibility with the Agency.
Official source
No official URL is available in our data for this grant.
Other grants of type “grant”
Other grants from Agence de l'Eau Seine-Normandie
Related needs and funding
Competitive calls for projects
Ecological transition and CSR
Capital and investment funds
Support and acceleration
Diagnostics and audits
Takeover and transfer
Discover the funding that fits your company
Check your eligibility for public grants
This scheme is only one of the grants your company may be able to access. Run a personalised scan to identify the funding opportunities that match your activity, location and project.
See the opportunities identified by the scan, then access your personalised report.





