All building work requires approval from the local authority in order to be classed as habitable space. Certain extensions can be done as a permitted development, such as a loft conversion or a single storey extension up to 3m in depth.
You should always apply for a Lawful Development Certificate to make sure your proposed extension falls within the permitted development rules. Depending on the proposed scheme there are various types of planning to apply for. Each application requires full plans of the existing and proposed scheme and potentially other supporting documents.
If you’re interested in discussing planning permission for your upcoming project and would like more information, please contact us to arrange a free consultation.