If your planning application has been rejected or has been approved with conditions you aren't happy with then you should always speak to the local planning authority in the first case.
It may be that an amended application with some proposals changed will be accepted – in which case you can use the Planning Portal service to amend and resubmit your application – in many cases for no additional cost.
On average only about one appeal in three is successful, according to the Planning Inspectorate's records. This rate has remained broadly constant over many years.
Appellants should be confident at the time they make their appeal that they are able to make their full case.