Glossary

94. Stormwater Management Plan DA (NB)

A Stormwater Management Plan must be submitted for all applications proposing new buildings, and where alterations and additions to an existing building will result in a net increase of more than 50m²of hard surface area on a site (excluding land in Warriewood Valley Land Release Area). The plan must demonstrate:

  • the direction of water flows on all surfaces,
  • any existing or proposed water collections points/methods
  • any existing or proposed water reuse systems
  • any existing or proposed connections to Council’s stormwater infrastructure
  • the size, location and design of any required on-site detention tank or basin
  • the size, location and design of any required rain garden
  • the size, location and design of any required rainwater tank
  • existing and proposed impervious area and percentage change in existing and proposed impervious area
  • consistency with any relevant BASIX recommendations.
Back to Glossary