Do I need planning permission to convert my basement?
Many home owners choose to convert their basement or cellar into habitable space. This development will have no impact on the external appearance of the property, and will usually not be detrimental to the neighbouring properties. Basement conversions are considered permitted development and do not require planning permission as long as the following guidelines are met:
- No excavations that require major building works are carried out
- It will not be a separate unit to the rest of the property (i.e. not self contained)
- The usage will not be significantly changed (i.e. its use will be ancillary to the use of the upper floors)
- No external changes are carried out (i.e. adding a lightwell)
Please note: the permitted development allowances described here apply to houses not flats, maisonettes, other buildings, listed buildings or council set conservation areas.
Basement conversions or cellar conversions are a great solution to create additional floor space to a property without building upwards. The conversion will have no impact on the surrounding properties or the visual appearance of the building. A few of our clients have chosen to build a basement underneath their rear garden to maximise the lower ground floor space. 4D Planning Consultants have years of experience with basement developments and would be happy to advise you with the best proposal for your requirements.
Although you may not need planning permission to convert your basement, there are still benefits of applying to the council for a lawful development certificate. Firstly basement extensions and conversions are very expensive, and by applying for a lawful development you will give yourself peace of mind and will give any future buyers of the property confidence that everything was carried out legally, lawfully and legitimately. Contact us for a no obligation phone conversation and we will offer you free advice and a free competitive quote for your permitted development application.
For a summary of when you would probably need planning permission click here.
For more information on the planning process, click here.