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Can You Install Double Glazing On Listed Buildings?

Owning or living in a listed building is great, it’s filled with character and has its own unique quirks that make it yours. However, when it comes down to repairs and upgrades, it can be hard to know what you can and can’t do on the building. As it’s getting colder, you may be wondering whether you are able to install heritage double glazing on your listed building. Double glazing can help keep the warmth inside and massively impact your energy bills. The answer is yes, you can install double glazing, however, it isn’t as simple as modern buildings.


Here’s what you need to know.

Georgian architecture

Are you allowed to install double glazing on listed buildings?

Yes, you are able to install double glazing on a listed building, however, because it is protected for historical significance and aesthetics it can be a little more complex and costly. You will usually have to opt for timber or stone window frames instead of uPVC double glazing. Some planning authorities such as English Heritage will try and stop any changes to listed buildings including double glazing.


This is irritating for many homeowners who live in listed buildings, as their original windows are thin and make the house very cold. If authorities are blocking planning permission for double glazing, you can opt for secondary glazing or heritage double glazing. This includes a slimline double-glazed insulated unit which consists of two-panes with an inert gas in between. These can be removed if necessary and still keep the integrity of the building.


What about Grade I listed buildings?

The same applies to Grade I listed buildings. You can’t replace your windows with any modern window frames such as uPVC double glazing that will impact the property’s window frames. Window installations must be approved by local planning authorities who may not approve of the hardwood double glazing you want. This is because Grade I listed buildings are even rarer than Grade II, with only 9,797 in the UK. Any alterations must be considered carefully. Historic England specifies that secondary glazing or heritage double glazing is the most acceptable option. The alterations must have no loss of historic fabric and the window installation needs to be easily reversible.


Looking for heritage double-glazing window installations in London? London Sash Windows & Doors offers hardwood double glazing that maintains the original features of listed buildings to help you provide insulation and warmth in your home. Call us today.

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