Policy information sourced from the Bexley Local Plan
DP33: Sustainable drainage systems
- All development proposals, whether increasing or decreasing the impermeable area of the site, will be required to manage surface water through sustainable drainage systems (SuDS) in line with all national, regional and local policies and related guidance, in order to minimise flood risk, improve water quality and enhance biodiversity and amenity.
- In addition, all development proposals will be required to demonstrate that:
- the drainage for the site achieves greenfield runoff rates for flood events up to and including 1 in 100 years plus 40% climate change;
- surface water run-off has been reduced by sustainably managing run-off on site;
- permeable paving has been used for hardstanding areas (e.g. car parks); d. the nature of water flow (both surface water and groundwater) across a steeply sloping site has been considered in order to provide suitable SuDS; and, e. water reuse mechanisms have been included for either indoor or outdoor purposes.
- Development proposals on sites of 0.25 hectares or greater require a drainage strategy, which must be accompanied by a suitable maintenance management plan.
For more information please see the Bexley Local Plan