West London Strategic Flood Risk Assessment

What is a Flood Risk Assessment?

A Flood Risk Assessment (FRA) is a report which must accompany certain applications to ensure that the land or property is suitable for the proposed development. They demonstrate how flooding to and from the development will be managed and mitigated both now and in the future, taking the impacts of climate change into account.

Guidance on whether a FRA is required and what it needs to contain can be found on the in the West London SFRA website. Please refer to section 4.2.4 for our Borough specific standard conditions.

If your application does require a FRA, you may need to contact a consultant to prepare it for you.

If your application requires a FRA and you do not submit one, your application will not be validated.

West London boroughs

The following West London boroughs have commissioned a joint Level 1 Strategic Flood Risk Assessment (SFRA):

  • Brent
  • Barnet
  • Ealing
  • Harrow
  • Hillingdon
  • Hounslow

This takes the form of an interactive map which shows if you are in a flood zone and provides guidance on flood risk across the study area.

How is the Environment Agency involved?

We consult the Environment Agency (EA) on certain applications. These include:

  • applications within flood zones 2 and 3
  • any application on a site over 1 hectare in size in flood zone 1
  • smaller applications in flood zone 1 which are in areas that have critical drainage issues

Should your application be referable to the EA we will issue the consultation.

View the EAs information on:

Where can I get further guidance?

The West London SFRA website contains a wide-range of guidance for applicants, including:

  • Application of the Sequential and Exception Tests
  • Sustainable Drainage Systems (SuDS)
  • Site-Specific Flood Risk Assessment (FRA)
  • Drainage Strategies
  • Flood Risk Management Structures and Features
  • Borough-Specific Requirements

Planning policy

For information about planning policy matters and advice on the Harrow self-build register.

Address: Harrow Council
Planning policy
PO Box 1358

Telephone: 020 8736 6082

Drainage & flooding

Technical advice on flooding, flood risk assessments including provision and fees for flood maps, site visits and pre application advice: