Sustainable Drainage Systems (SuDS)
Updated 15 May 2015
As the Lead Local Flood Authority (LLFA) Hampshire County council is a statutory consultee for Surface Water Drainage on applications for major development. This new role started on 15 April 2015 and requires Hampshire County Council to be consulted on these developments when a planning application is received by the Local Planning Authority.
As a statutory consultee we are not responsible for determining planning applications or commenting on issues that do not fall within our remit. We are not at present offering pre-application advice as a standard service and requests will be determined on a case by case basis.
“Major development” means development involving any one or more of the following:
- the winning and working of minerals or the use of land for mineral-working deposits
- waste development
- residential development: 10 dwellings or more, or residential development with a site area of 0.5 hectares or more where the number of dwellings is not yet known.
- non-residential development: provision of a building or buildings where the total floorspace to be created is 1000 square metres or more, or where the floor area is not yet known, a site area of 1 hectare or more.
What are SuDS?
Sustainable Drainage Systems (SuDS) are designed to mimic the natural drainage of surface water, typically managing rainfall close to where it falls. Surface water flows are then slowed down and discharged at a controlled rate before it enters a watercourse. They can also store water, allow it to soak into the ground or enable evaporation from surface water. SuDS offer a wide range of benefits, as they can:
- manage flood risk
- maintain and improve water quality
- maintain and increase biodiversity
- provide amenity and green open spaces
- maintain groundwater recharge though infiltration
SuDS features include; filter strips and swales, filter drains and permeable surfaces, infiltration devices and basins and ponds.
For further information on SuDS, please see:
For further information on Sustainable Drainage Systems in Hampshire: