Extending a listed property will almost always be a much trickier proposition in comparison to adding space to an unlisted (and particularly modern) property. Making major alterations to a listed home will mean securing listed building consent. What do you need to know if you are considering a listed property extension or extending a property in a conservation area.

Permitted Development rights

Permitted development (PD) rights don’t apply to listed buildings or designated regions, such as areas of outstanding natural beauty (AONB). It’s against the law to amend such properties without the appropriate consents. Any improvement schemes will probably need to be sympathetic to the original building and require careful planning and well-considered materials.

You will require a listed building consent for all works and demolition, alteration or listed property extension.  A listed property is a building of special architectural or historic interest. The requirement applies to all types of works and to all parts of those buildings covered by the listing protection. This could possibly include attached and curtilage buildings or other structures. The requirement is for all works that affect the character of the building as a building of special interest.

Application for listed building consent

An application for listed building consent is made to and determined by, the local planning authority (LPA). Where the works have an impact on the external appearance of the property such as a listed property extension, planning permission may also be required and if so should be applied for at the same time. The LPA must consult Historic England and the National Amenity Societies on certain listed building consent applications.

You cannot demolish a building in a conservation area without consent of the LPA. Removal of architectural details, making holes in walls to create new windows, or demolishing one wall to allow an extension would not amount to demolition and so would not require permission for demolition. You may still need planning permission for such works though if you are looking into extending listed properties.