How Big Can I Build An Extension Without Planning Permission

Estimated reading time: 3 minutes

Building an extensionYou have a lot of creative ideas and different furniture designs in your mind to deck up your house. The current structure and space would not allow you to go ahead with your creativity because of lack of space. An idea pops up in your head to renovate and build an extension of your house. The next question that might crop up in your mind is, ‘how can I extend my house without planning permission

Yes, it is possible to renovate your dream home and build an extension but there are certain guidelines within which you need to act so that you do not get into trouble with the planning and building regulators. You also would not like to take the hassle of running for planning permission. This article will cover 8 possible building extensions where you do not need planning permission.

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Building Extensions You Can Do Without Planning Permission

1. The extended part should not go beyond any wall which faces a road in case it forms the principal elevation or side elevation of the main building.

2. The land occupied by the extended portion should be within the periphery of the original property. The extended area should be restricted to half the total area of the original property excluding the area of the existing building.

3. In case you are planning to remodel the eaves, you cannot extend it beyond 3 metres in height when any extended portion lies within 2 metres of the boundary of the property.

4. Here is an important point you need to note. The materials that you would use for outdoor extension should be similar to that of the existing house. Any sort of materials that you are planning to use for external work should be of related to the materials used in the existing house.

5. In case you are planning to construct a single storey on the existing building, you need to ensure that the extended part does not go beyond 4 metres from the rear wall of the existing building. Also, you need to keep in mind that the height of the extended portion does not go beyond 4 metres. In case it is within 2 metres of the boundary of the property, the height of the extension should be strictly restricted within 3 metres.

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6. In case you are doing some innovations with your windows, you need to keep the following points in your mind:

  • You do not need Planning Permission to insert new doors and windows
  • However, if the windows are of the upper floor present on side elevation within the purview of 15 metres from the boundary which the original building shares with another house, it should be glazed with obscured glasses having obscurity level of 4 or 5.
  • The windows should have fixed frames which do not open unless the opening parts are present at a height exceeding 1.7 metres above the floor of the where the windows are installed.

7. In the case of two storey extension, you need to keep in mind that:

  • The permissible extension is within 3 metres outside the rear wall of the already existing structure
  • The extension should not lie within 7 metres of the boundary of the property that lies on the opposite side of the rear wall
  • The height of the extended part should not go beyond 4 metres

8. You will not have permission to build raised platforms, verandas or balconies.

In case your house is a listed building, you need to get the Listed Building Consent to get started with any remodelling or extension.

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Final Words

All in all, you must have got a fair idea regarding your restrictions in building an extension without planning permission. These regulations are put in place for your safety but then again you can go ahead and have your creative liberty to renovate the house within the mentioned boundaries.

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Mat

A complete novice trying to navigate in the world of DIY. I bought my first home about 2 years ago & ever since I've been trying to research & learn how best to tackle common household problems.

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