Normally the decision notice from the LPA will include some notes that will confirm your rights of appeal and the time period within which you must submit the appeal.
A planning appeal currently has to be received by the Planning Inspectorate within six months of the date of the decision. You will lose your right of appeal if you do not submit it within this timeframe.
The full requirements and process for submitting a planning appeal are detailed on GOV.UK. However, there are different appeal procedures available for this type of appeal.
Most of these types of appeal are dealt with by means of written representations.
You do have the option of opting for an informal hearing, or for more complex applications you can consider whether an inquiry might be more appropriate.
Details on what type of procedure you should choose, and the processes and timeframes involved can be found here.
There are strict timeframes and procedures in place to ensure that relevant information is submitted in a timely manner and to enable all parties the opportunity to comment.
Other parties involved in the appeal process will include the LPA and people who may have an interest in the application, such as neighbours or local amenity groups. All will have an opportunity to make written comments on your appeal.
The planning inspector allocated to your appeal will consider all the written evidence provided by all parties and will visit the site to assess the proposal.
If the appeal is to be heard by means of an informal hearing or an inquiry, then there will also be discussion between the parties, on a day (or days) set by the Planning Inspectorate.
A final decision will subsequently be made in writing after the site visit. The whole process from submission to decision should take around three months.