Conservatories and Rear Extensions

Conservatories and Rear Extensions


  • Increased living space
  • A predominantly glazed structure brings the garden into your home particularly if you have a complimentary patio area
  • A predominantly glazed structure offers an ambient light

N.B. Planning Permission for Extensions is not always required

Key Points

When planning a conservatory/single storey rear extension, the key points to think about are

  • Site Coverage
    Did you know that you will need planning permission if the proposed conservatory/single storey rear extension (when taken with existing extensions, outbuildings and decking for example), will cover more than 50% of the land around your home?
  • Location
    In terms of location, if your property fronts a road and you wish to put an extension closer to that road than the principal elevation, you will need planning permission.
  • Height
    Assuming the proposal is only single storey, its maximum height can be no more than 4 metres. Interestingly, if your proposal has an eaves and ridge height greater than that of your property, you will need planning permission. Also, if you are planning on putting an extension within 2 metres of a boundary, the eaves height cannot exceed 3 metres.
  • Depth
    If you live in an attached house (say a terraced or semi-detached house for example), the maximum depth you cannot exceed is 3 metres and 4 metres in the case of detached house.
  • Veranda
    You will require planning permission if you wished to add a veranda or raised platform to the structure.
  • Cladding
    Last but not least, if your house occupies designated land, you cannot clad it. What this means is not entirely clear but we will attempt to interpret this in future articles.


You might want to consider information in these additional areas:

The Conservatory Directory

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