You can often extend or add to your house without the need to apply for planning permission provided you meet set limits and conditions.

The regime for what is allowed without planning permission applies largely to the dimensions of the proposed extension, its position on the house and its proximity to your boundaries.

You will also need to apply for planning permission if more than half the area of land around the ‘original house’ would be covered by additions or other buildings.

NOTE: The extension featured here is for illustrative purposes.  

The term 'attached house' means any house that shares a party wall with a neighbouring building.

The permitted development allowances described here apply to houses and not to flats and maisonettes.

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Advert: A planning consultant may help with the smooth running of your project. To find an accurate consultancy quote, explore Studio Charrette's calculators.

Building regulations generally apply if you want to build an extension to your home.

However, a porch or conservatory built at ground level and with a floor area of no more than 30 square meters in floor area is normally exempt, provided that any glazing and any fixed electrical installation complies with the applicable requirements of the building regulations (i.e. Part K - ‘Protection from falling, collision and impact’ and Part P - ‘Electrical Safety’ for England only) (Part N - ‘Glazing’ and Part P - ‘Electrical Safety’ relevant to Wales).

Learn more about extensions.

Advert: A planning consultant may help with the smooth running of your project. To find an accurate consultancy quote, explore Studio Charrette's calculators.

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Using energy efficient glazing is just one way of making an extension greener.