Do I Need Planning Permission?
Under the Town and Country Planning Acts, planning permission is required for development. Development is defined as building, mining, engineering or others operations or a material change of use.
Secondary legislation allows certain development to proceed without applying for planning permission. This is often called 'permitted development'.
With effect from 1st October 2008, new legislation has been issued with respect to the paving of front gardens and to residential extensions generally. This means that some works that previously would have required planning permission will now be exempt. Equally, some works that previously were exempt will now require permission. If you are about to commence work, you are strongly advised to check that the new legislation does not alter any advice you may have received previously.
The new regulations are open to interpretation and therefore we will no longer give informal advice. Formal advice please apply for a Lawful Development Certificate
- Further details are available from the Planning Portal and their Interactive House tool.
- View text of the new legislation
- Guidance on the permeable surfacing of front gardens
If you want to calculate the volume of your roof extension only, click on the link below
You may need permission if your house has been previously extended or was built in the last few years. Extensions to flats and maisonettes will always require permission, including those converted from houses.
If you are considering an extension to your house, you may find the attached checklist helpful.


