This £12 million fund is for projects which create and improve green (eg. parks, trees and community gardens) and blue (eg. wetlands, rivers and sustainable drainage) infrastructure in London.

Grants of between £10,000 and £500,000 are available to support projects of up to two years, that enhance biodiversity, improve climate resilience, and promote community engagement across the capital.

The priority for 2025 is projects focusing on clean and healthy waterways.

The funding is open to charities, local authorities, community groups, CICs, and housing associations.

It supports both physical improvements, such as tree planting, SuDS, wetlands and rewilding, and preparatory work – including feasibility studies, co-design, and volunteer engagement.

Projects must be located in Greater London and demonstrate long-term environmental and community benefits.

The closing date for Round 3 submissions is 2pm on Thursday 28 May 2026.

For full guidance, an information webinar and case studies, visit the Mayor of London’s Green Roots Fund webpage here.