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Flood Blog

SuDS (Sustainable Drainage Systems) consultee role - facts and figures

Essex County Council as Lead Local Flood Authority has been a statutory consultee in relation to surface water drainage for major developments since 15th April 2015.

Major developments are defined as development involving:

  • the winning and working of minerals
  • waste development
  • 10 or more dwellings or where not specified, a site area of 0.5ha
  • Providion of a building where floor space is 1,000 square metres or more
  • Development carried out on a site over 1ha.

In undertaking the role, the LLFA checks:

Up to the 14th April 2016, taking a whole year’s data, we received 759 consultations relating to approximately 500 planning applications. These can be broadly split into the below categories:

SuDS percentage of applications by category


Applications are checked for compliance with our policy set out in the ECC SuDS Design Guide available at We also have a pre-application process which has proved successful where subsequent planning applications are received. The Environment Agency remain the statutory consultee for sites in Flood Zones 2 & 3, in areas of contaminated land and which may impact on Groundwater Source Protection Zones.