Small single-story extensions often do not require full planning permission and can be built within permitted development rights, providing all the relevant criteria are met and there are no constraints which limit or remove your permitted development rights.
For extensions that are likely to fall within permitted development a lawful development certificate is recommended, so that you know your project is compliant and is protected from any retrospective planning issues, enforcements or penalties. Building regulations may also be required depending on the extent of the works.
Large extensions or double-story extensions usually require full planning permission which may be secured through a householder planning application. Flats and maisonettes do not benefit from permitted development rights so in order to extend planning permission is always required.
The following is a brief overview for the planning requirements for each type of extension:
For all extensions
For side extensions
Where it would extend beyond the ‘side elevation’ of the original house, the extension:
On designated land all side extensions will require householder planning permission.
For single storey extensions
For extensions of more than one storey
On designated land all rear extensions of more than one storey will require householder planning permission.If there are any constraints that limit or remove permitted development rights or even one of these criteria is not met, then you are required to submit an application for planning permission.
If planning permission is required but the works are completed without first securing the proper planning approval you may face retrospective planning issues. If the local planning authority determine that planning permission was required an enforcement and or penalties may be issued. If planning permission cannot be secured retrospectively the extension may need to be demolished.
If you are in any doubt our expert planning consultants can help. By carrying out a planning appraisal we can advise you on whether planning permission is required, the feasibility, process, timescales, likelihood of success and answer any other questions that you have. Once we know exactly what is required for your project, we will provide you an accurate quote for us to help you.