Policy information sourced from the Croydon Local Plan

DM25: Sustainable Drainage Systems and Reducing Flood Risk

DM25.1

The Council will ensure that development in the borough reduces flood risk and minimises the impact of flooding by:

  • Steering development to the areas with a lower risk of flooding;
  • Applying the Sequential Test and Exception Test in accord with Table 8.1;
  • Taking account of all sources of flooding from fluvial, surface water, groundwater, sewers, reservoirs and ordinary watercourses; and
  • Applying the sequential approach to site layout by locating the most vulnerable uses in parts of the site at the lowest risk of flooding.

DM25.2 

In areas at risk of flooding development should be safe for the lifetime of development and should incorporate flood resilience and resistant measures into the design, layout and form of buildings to reduce the level of flood risk both on site and elsewhere.

DM25.3 

Sustainable drainage systems are required in all development and should:

  • Ensure surface run-off is managed as close to the source as possible;
  • Accord with the London Plan Sustainable Drainage Hierarchy;
  • Achieve better than greenfield runoff rates;
  • Be designed to be multifunctional and incorporate sustainable drainage into landscaping and public realm to provide opportunities to improve amenity and biodiversity;
  • Achieve improvements in water quality through an sustainable drainage system management train; and
  • Be designed with consideration of future maintenance.

For more information please see the Local Plan