Planning Permission

What's the Story on Planning Permission?

Do You Even Need It? and How Do You Begin?

Obtaining planning permission for a planned extension to your property doesn't have to be scary, furthermore, not all extensions actually require planning permission - check with your local council planning dept. to find out if your planned home extension needs permission or not.

Side Extension - Planning Permission Guidelines

Planning permission will not be required when building a side extension if:

  • If the extension is single storey, being not more than 4 metres in height and not wider than 50% of the original house.
  • The materials used match the existing style of the property.
  • You are not building on any more than 50% of your private garden area. You must take into consideration any existing outbuildings as these count towards the private garden.

Rear Extension, Orangery or Conservatory - Planning Permission Guidelines

Due to the new regulations which were implemented on 1st October, 2008, planning will not be needed if:

  • No more than half the area of land around the original dwelling is to be utilised for new building construction.
  • No proposed extension should project beyond the face of the principal elevation or side elevation which fronts a public highway.
  • No building extension should exceed the level of the existing roof ridge.
  • The maximum depth for a single-storey rear extension should be 3 metres for a semi-detached or terraced dwelling and 4 metres for a detached dwelling.
  • The maximum height of a single storey rear extension should be no more than 4 metres.
  • The maximum depth for a rear extension, consisting of 2 storey levels or more (incl. ground floor level) should be no more than 3 metres.
  • The maximum height of a proposed eaves to an extension which is within 2 metres of a boundary should be no more than 3 metres.
  • The maximum height of a proposed eaves and ridge to an extension is not to exceed the heights of the respective existing eaves and ridge.
  • Proposed side extensions to be single storey with maximum height of 4 metres and maximum width should be no more than half of the existing dwelling.
  • Proposed roof pitches to extensions which are higher than 1 storey level to match existing dwelling.
  • No balconies, raised platforms or verandas.

The above should help you establish if you need planning permission or not, if you think you DO need planning permission, there is a number of ways you can go about it, if you are serious, you are more than likely going to need to enlist the help of an architect to draw up some proposed plans.

To submit a planning application, you can visit your local council planning department or you can make an application online at -

  • To download the Planning Portal's guidance noted in PDF format, please click here.
  • Click here for Planning Portal's FAQ and support team contact info who can help you through the process.
  • You can download blank forms here to make a planning application.
  • Finally, you can find video tutorials here on how to apply.

We have collected the information above from various websites and hope you find this information useful, however it is up to you to check the accuracy of the information providedas we cannot guarantee the sources from which we obtained the information.

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