A surface water drainage strategy is often sufficient for a planning application, however the detailed design of the drainage system can sometimes be required, or made a condition of planning.

Surface Water and Foul Water Drainage Strategies are also frequently conditioned as part of planning permission if they are not submitted with the planning application.

Examples of Planning Conditions

Some examples of Local Planning Authority planning conditions relating to drainage where we have recently provided the required information to discharge the planning condition include:

• No works on site shall commence until a detailed drainage scheme (to include the disposal of surface water by means of sustainable methods of urban drainage systems) has been submitted to and approved in writing by the Local Planning Authority. The development shall only be implemented in accordance with such approved details.
• Prior to first occupation of the development hereby approved, a surface water system that demonstrates that the SuDS hierarchy has been followed shall be submitted to and approved in writing by this Local Authority.
• The submission of reserved matters shall be accompanied by a sustainable drainage scheme for foul and surface water drainage. No dwelling hereby permitted shall be occupied until a sustainable drainage scheme for foul and surface water drainage from the site has been completed in accordance with the approved details. The sustainable drainage scheme shall be retained, managed and maintained for the lifetime of the development in accordance with a management and maintenance plan submitted to and approved in writing by the local planning authority.
• No development shall take place until a detailed sustainable surface water drainage scheme for the site has been submitted to (and approved in writing by) the local planning authority. The detailed drainage scheme shall demonstrate that the surface water generated by this development (for all rainfall durations and intensities up to an including the climate change adjusted critical 100yr storm) can be accommodated and disposed of without discharging onto the highway and without increasing flood risk on or off-site. The drainage scheme shall also demonstrate that the silt and pollutants resulting from the site can be adequately managed to ensure there is no pollution risk to receiving waters.
• The development shall not begin until details of a scheme for separate foul and surface water drainage, including any balancing works or off-site works, have been submitted to and approved in writing by the Local Planning Authority. Surface water must first be investigated for potential disposal through use of sustainable drainage techniques and the developer must submit to the Local Planning Authority a report detailing the results of such an investigation together with the design for disposal of surface water using such techniques or proof that they would be impractical. The scheme would also be required to demonstrate that there is no resultant unacceptable risk to controlled waters. The scheme so approved shall thereafter be implemented in full before the first occupation of the development.
• Prior to the commencement of development details of surface water drainage works shall be submitted to and approved in writing by the Local Planning Authority. Before these details are submitted an assessment shall be carried out of the potential for disposing of surface water by means of a sustainable drainage system and the results of the assessment provided to the Local Planning Authority. Where a sustainable drainage scheme is to be provided the submitted details shall:

1. i) provide information about the design storm period and intensity, the method employed to delay and control the surface water discharged from the site and the measures taken to prevent pollution of the receiving groundwater and/or surface waters;
2. ii) include a timetable for its implementation; and

iii) provide a management and maintenance plan for the lifetime of the development which shall include the arrangements for adoption by any public authority or statutory undertaker and any other arrangements to secure the operation of the scheme throughout its lifetime.

Prior to the occupation of the buildings hereby approved the surface water drainage works shall be carried out and the sustainable urban drainage system shall thereafter be managed and maintained in accordance with the agreed management and maintenance plan

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If you would like more information or assistance with any planning conditions then get in touch today. Our team of drainage experts are on hand right now to support your planning application.

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