Determination
The law requires that all applications for planning permission should be decided in accordance with the policies of the "development plan" – unless material planning considerations indicate otherwise. The decision on any planning application is therefore "policy-led" rather than "influence-led". Although the public and nearby residents will be consulted about almost any planning application, the decision will not be made on the grounds of popularity or unpopularity. The framing of the decision by reference to published planning policy prevents the decision on a planning application being made on grounds which are arbitrary, perverse, or subject to impropriety.
It is therefore most important that applicants for planning permission satisfy themselves about the relevant local development plan policies before making an application. These can also be viewed via the LPA's website, or the UK government's Planning Portal, which provides a nationwide clearing house on planning information and advice for both government and local planning policies. As a practical matter it is very advisable to discuss proposals with the LPA before incurring the fees and other costs that are involved in making a planning application, or the delays and abortive costs that would arise from the refusal of planning permission.
Read more about this topic: Planning Permission