This location is in flood zone 1

What flood zone 1 means

Land within flood zone 1 has a low probability of flooding from rivers and the sea.

Most developments that are less than 1 hectare (ha) in flood zone 1 do not need a flood risk assessment (FRA) as part of the planning application. The site you have drawn is 0.07 ha.

Find out more about flood zones and what they mean .

There is a risk of flooding from surface water at this site. You should check one of the following:

To find out about other factors that might affect the flood risk of this location, you should also check:

Flood map showing the flood zone your site is in

The map shows the flood risk to your site and the surrounding area.

A map showing the flood risk for the location you have provided

Map

View map key
  • Icon showing what flood zone 1 looks like on the map. Your site boundary
  • Icon showing what flood zone 3 looks like on the map. Flood zone 3
  • Icon showing what flood zone 2 looks like on the map. Flood zone 2
  • Icon showing what flood zone 1 looks like on the map. Flood zone 1
  • Icon showing what a flood defence looks like on the map. Flood defence
  • Icon showing what a main river looks like on the map. Main river
  • Icon showing what a flood storage area looks like on the map. Water storage area
What the flood map shows

The flood zones in the map show the areas of land at risk of flooding. They:

  • only show flood risk from rivers and the sea
  • are based on present day flood risk, they do not show how it may change in future because of climate change
  • ignore the effect any flood defences shown could have

Download the flood map for this location

The flood map is suitable for a local planning authority to use when checking a planning application to see if a development is:

  • in flood zone 1, 2 or 3
  • within 20 metres of a main river or a flood defence
  • a water storage area (also likely to be flood zone 3b in the SFRA)
Add a reference to the flood map and set the scale

Optional. This is chosen by you to help you find the report later and should be less than 25 characters.

Select the scale of the map shown in the report

Decide what you need for your planning application

You only need an FRA in flood zone 1 when one or more of these points apply:

  • the development has a site area of 1 ha or more
  • it's in an area with critical drainage problems
  • the local planning authority's SFRA shows it'll be at increased flood risk in future
  • the site is at risk from other sources of flooding and its development would increase its vulnerability classification

Order flood risk data for rivers and the sea

To request flood risk assessment data for this site, contact the Environment Agency team in Hertfordshire and North London at hnlenquiries@environment-agency.gov.uk

Your email should say that you are requesting flood risk assessment data (also known as a product 4) and include:

  • the address
  • a map showing the site boundary

As your selected location is in Flood Zone 1, it is likely that there will be no extra data available.

Get help deciding what flood risk information you need

Email the Environment Agency team in Hertfordshire and North London at: hnlenquiries@environment-agency.gov.uk.

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