If you carry out unauthorised work or do not follow the details of approved plans, you will be in contravention of the Planning (Listed Buildings and Conservation Areas) Act 1990. This may result in enforcement proceedings. You will be required to make good any damage or to reinstate any works which are not approved at your own expense. You may also be liable to prosecution as carrying out unauthorised works to a listed building is a criminal offence.
Reinstatement is expensive and inconvenient. You are strongly advised to seek the advice of the Planning Services section before carrying out any works to the building. When a property is sold, a solicitors’ search will highlight all Listed Building Applications made. Failure to follow correct procedures can delay or jeopardise the sale of the property.