A 'listed building' is a building, object or structure in the UK that has been considered as of national importance in terms of architectural or historic interest and included on a register called the List of Buildings of Special Architectural or Historic Interest.

Buildings are listed to help protect the physical evidence of our past, including buildings, which are valued and protected as a central part of our cultural heritage and our sense of identity. Historic buildings also add to the quality of our lives, being an important aspect of the character and appearance of our towns, villages, and countryside.

There are three listing grades:

- Grade I - Buildings of exceptional interest

- Grade II* - Particularly important and more than special interest

- Grade III - Buildings of special interest, warranting every effort being made to preserve them (this is the most common)

If you live in a listed building it means you cannot demolish or alter the building in a way that changes its character without Listed Building Consent.

Read detailed guidance on Listed Building Consent

Adding an internal wall will not require planning permission or building control approval in most cases. If the building is listed, then you may require listed building consent to make a major alteration to the house.

 Any work completed should adhere to building regulations, ensuring fire routes, electrics and ventilation are considered.

Building above an attached garage is treated the same as adding a storey to the rest of your home. This is considered to be permitted development, not requiring an application for planning permission provided you meet the set rules and requirements.

You will still need to submit an application for prior approval to your local planning authority.

Read the list of rules and requirements for extending upwards.

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Planning permission may be required for external insulation if it impacts the external appearance of the building. If materials are of a similar appearance to those used in the construction of the house, then permission will likely not be required.

Listed buildings will require listed building consent for any significant work.

If you live in a Conservation Area or other protected area you will need to apply for planning permission before making changes to the outside of your house.

Further information and building regulations advice is available on Planning Portal. Read our external walls common project.

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Planning permission is not required to move an internal doorway, provided it does not impact the external appearance of the building. If the building is listed, you will require listed building consent for any changes to the building.

Building regulations may apply if the wall is load bearing or is part of a fire escape route.

Read more about windows and doors from our common projects.

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