Planning Information: Home Extensions
Side Extensions
Planning Permission will not be required if:-
- The extension to the side of the property is only single storey and no higher than 4 metres and no wider than half the width of the original dwelling house.
- Conservatories and single storey rear extensions within 2 metres of a boundary are no higher than 3 metres with a flat roof or 4 metres with a pitched roof.
- Materials must match the existing.
- No more than 50% of your private garden area can be built upon. In this calculation, you must include any outbuildings that already exist here.
On designated land* no permitted development for rear extensions of more than one storey, no cladding of the exterior and no side extensions.
* Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.
What this means is:-
Any side extension you propose can be no wider than half the width of the original dwelling house. In this case, the original house means as it was first built or as it stood on 1st July 1948. If you intend to build within 2 metres of the boundary, the important thing to recognise is the height restrictions that apply depending on the style of extension you propose.
In addition, did you realise that you can build upon no more than 50% of your garden area? In working this out, please remember to include those outbuildings which already exist here in your calculation (say your garage or shed for example).
If you live within any area that enjoys a statutory designation* such as a conservation area or national park, do remember that it will not be possible to build a side extension without planning permission. Please see the planning application section on information on how to apply for planning permission.
