Some minor alterations and extensions can often be carried out without the need to apply for planning permission. This is known as 'permitted development'. Most single houses benefit from permitted development rights (PD).
Permitted Development rights do not apply to flats, maisonettes, mobile homes or residential caravans.
Guidance on the need for planning permission and building regulations for many common building works is available via the Planning Portal.
Check whether any of the following permitted development restrictions apply to your property:
If you are still not sure whether your building project needs planning permission you can submit an application for a certificate of Lawfulness for a proposed use or development. You will receive a formal decision as to whether your proposal is permitted development or an application for planning permission is required. Read more about Lawful Development Certificates on the Planning Portal.
Applications can be made online via the planning portal or paper copies obtained from the planning website. The fee for Lawful Development Certificates for proposed householder developments is normally £86.
For a period of six years, between 30 May 2013 and 30 May 2019, householders can build larger single-storey rear extensions under permitted development, provided their property is not within a conservation area. The size limits have doubled from 4 metres to 8 metres for detached houses, and from 3 metres to 6 metres for all other houses.
These changes are subject to a number of limitations and conditions, including requirements relating to the height of extensions and distances from boundaries.
If you wish to build a larger single storey extension you are required to notify the Council and provide details of what you are proposing to build, as the new size limits are subject to a neighbour consultation scheme. There is no fee for this process.
If you wish to undertake internal or external alterations which affect the character of a listed building or extend or demolish part or all of a listed building you will require listed building consent.
Remember, whether or not your building project requires planning permission you will still need to comply with Building Regulations.