Listed buildings are protected by the council and are categorised by three grades. These properties are often built before the 1700s and showcase their original architecture. 

Planning permission for double glazing is typically required if you live in a listed building or conservation area, we recommend confirming with your local council. 

Older buildings are prone to mould, damp and mildew because of condensation. This is caused by gaps in the windows and doors, so installing secondary glazing helps to eradicate this. 

If you happen to own a listed property, consent will be required for alterations that affect the character of the building. In some cases, restorative projects will be refused if they interfere with the building’s character too much. In the case of installing double glazing, you will have to require the consent of the planning authority. As a general rule, consent will need to be provided to carry out any work on listed buildings. 

Listed building consent is required for any work which will affect the character of a listed property. To have work carried out without consent is a criminal offence. If you are the owner of a listed building, you must ensure you follow the regulations and guidelines that are put in place by the planning authorities. Although secondary glazing is the favoured method of improving a listed building’s window performance, it is still advised that you obtain permission before installation. 

Those fortunate enough to own a listed building will find making any significant changes challenging. This is because consent is required by planning authorities which protect the interests of the property. For owners of a grade two building looking to replace windows, you will have to obtain permission to do so. It is worth noting that changes that significantly affect the outside appearance of listed buildings are generally frowned upon.