For most people extending a property, a successful application for planning permission will be necessary before any work can be undertaken. Planning seeks to control the way that neighbourhoods, towns and cities are developed, focusing on the way that land is used, the appearance of buildings, landscaping considerations, road access and the impact that a development will have on the environment.

You will definitely need planning permission if:

* The proposed extension is higher than the highest part of your original roof.

* Any part of the proposed extension is over four metres high and within two metres of your property boundaries.

* The ground area covered by the proposed extension covers more than half of the total property area (excluding ground covered by the original building).

* The total volume of original property is increased by more than 115 cubic metres (volume is calculated using the external dimensions of the structure: length x breadth x height).

* Any property in a conservation area, a national park or the Broads.

* From October 2008 there have been changes to Permitted Development Rights. Further Information on this can be found through the governments planning portal website.

Information correct as at time of upload (or print) March 2009.The information provided should be used as a guide only. homextendesign does not take any responsibility for information provided and it is advised that customers seek advice through our contact section.