Planning policies for renewable energy technologies, including wind turbines, are set out in Planning Policy Statement 22 (PPS22). PPS22 is supported by a companion guide which provides practice guidance on planning for renewables. Both documents are available at www.communities.gov.uk
PPS22 expects local planning authorities to
“ensure that renewable energy developments have been located and designed in such a way to minimise increases in ambient noise levels”;
and in doing so, assess and rate noise from wind energy developments using the 1997 report by the Energy and Technology Support Unit. This report is available on the BERR website (www.berr.gov.uk). There are no plans to review this guidance at present.