The Small Scale Sustainable Drainage Systems (SuDS) Decision Support Tool has been developed by Royal HaskoningDHV and is designed to assist councils in assessing the suitability of SuDS provision within small scale development proposals. The main focus of the tool is to enable councils to ensure that the water attenuation requirements for SuDS are met by development proposals. It does not give definitive attenuation volumes that will be achieved by a specific SuDS solution and a final design will be required to determine the actual performance of the system.