Local list

Flood risk assessment

Policy driver

National Planning Policy Framework|External linkNational Planning Policy Framework Section 10 Paragraph 103
Paragraph 9,

Planning Practice Guidance on Flood Risk and Coastal Change|External link
Replacement Unitary Development Plan – Policies EP16 and EP17

Type of application
  1. Sites of 1ha or more in Flood Zone 1
  2. Any development in Flood Zones 2 and 3
  3. Any application not falling into types 1 and 2 above for;
    • a change of use to a more vulnerable use (See Further Information below for definition)
    • a development for 4 or more houses,
    • a development of 100sq metres or more of new non residential floor space or
    • the creation of 100sq metres or more of, or alteration to, access and car parking;
    • on a site that is at risk from other sources of flooding
Geographic locations where this information is required-All areas
What information is required

Application types 1, 2 & 3:      Evidence that the site meets the, Flood risk sequential and exception testif appropriate.


Application type 1:      full Flood Risk Assessment

Application type 2:      full Flood Risk Assessment

Application type 3:      a Surface Water Drainage Self Assessment Form [PDF file 109KB]|PDF file

Your Flood Risk Assessment (FRA) should identify and assess the risks of all forms of flooding to and from the development and demonstrate how these risks will be managed, taking climate change into account. The FRA should be proportionate to the scale and nature of the development and the risk. It should describe the design of surface water management including consideration of Sustainable Drainage Systems (SuDS) and address the requirement for safe access to and egress from the development in areas at risk of flooding. Finally it should indicate how exceedance flows will be managed on or off site without increasing flood risk.

Where to look for further assistance

See 'Further Information' below.

If, after reading the Further Information, you are still unsure as to what to submit, contact the Council's Drainage Engineer on (01422) 392168 and the Environment Agency on (03708) 506506..

Further information


Flood Zones

Flood Zones are defined in the Planning Practice Guidance Table 1 and shown on the Environment Agency’s Flood Risk Maps|External link 

Any area not mapped as Zone 2 or 3 falls within Zone 1.



Levels of vulnerability are defined in the Planning Practice Guidance Table 2. Compatibility of vulnerable development with flood zone sites is defined in the Planning practice Guidance Table 3.


Flood Risk Assessments

The FRA should be prepared by an applicant in consultation with the local planning authority with reference to published local development documents and the Calder Valley Strategic Flood Risk Assessment (NB This document and the associated maps are currently under review.

The Environment Agency’s provides Flood Risk Assessment Guidance|External link on preparing flood risk assessments that is specific to the particular flood zone and type of development.


Flood risk sequential and exception test


Prior to producing a flood risk assessment, it is advisable to ensure that the sequential test has been passed. If there are other available sites at a lower probability of flooding that could accommodate the proposed development then the sequential test will be failed and a flood risk assessment would be irrelevant.  If the application of a sequential test demonstrates that it is not possible to locate the development in a lower flood risk zone, an exception test may then be required.



The Flood Risk Assessment should form part of an Environmental Statement when one is required by the Town and Country Planning (Environmental Impact Assessment (Amended) 2015.

Last Updated: 09/11/2016