Making changes to a Listed building: The crucial things to know

publication date: May 4, 2022
author/source: Guest article from Urbanist Architecture

Making changes to a Listed building: The crucial things to know


 Making changes to a Listed building: The crucial things to know


We get a lot of calls from people about Listed buildings. These tend to fall into a few categories:

  1. People who made changes to Listed buildings having not checked what they are allowed to do and are now in big trouble.

  2. People who have bought a Listed building and are confident that they can do whatever they want with it.

  3. People who own a Listed building and are terrified, convinced that they can do almost nothing at all to it.


As a starting point, it’s probably safest to be in the third category, because since making unauthorised changes to a Listed building is a criminal offence, those in the first two groups can end up in serious trouble.

That doesn’t mean, however, you should despair of making any changes at all to your Listed building. Listed Building Consent is granted all the time. But you do need a very clear idea of what you are doing. We certainly think there should be an information pack automatically provided to anyone who becomes the owner of a Listed building.

The Basics

What we are talking about here are buildings on the list overseen by Historic England (or the equivalent lists in Scotland, Wales and Northern Ireland) and protected by law - locally Listed buildings are a very different thing altogether. Nationally Listed buildings generally are given that status because they have:

  • Architectural interest

  • Historical associations with events or people

  • Other historical significance or importance


Any changes - inside or out - beyond basic repairs to any structure on the list will need Listed Building Consent from the local planning authority. This includes changes made to non-original elements of the building - even if we’re talking about some tacky built-in cabinets added in the 1980s, you are still meant to get the council’s permission before you rip them out.


Not all Listed buildings are the same

On one level, this is obvious. There are around 400,000 Listed buildings according to Historic England. Over 90% of these are Grade II. Another 5.8% are Grade II* and just 2.5% Grade I. Therefore, what you’ve got on your hands with a Grade I is clearly very different from Grade II.

But even within Grade II, there’s a huge range of situations. In a lot of cases, the listing will be for ‘group value’. This means that the main reason for the individual structure to be listed is because it forms part of a collection of buildings that either share a history or work well together. That will limit the changes you can make on the outside - you shouldn’t be disrupting the group – but can mean that you are freer to make changes to the interior. 

Much will depend on the listing itself and the history of the building. As a general rule, the older the listing, the less detail it has. This is good and bad: in theory, the listing should give you a sense of what the valued features of the building are. Anything not mentioned, by implication, is less crucial, although that doesn’t give you free rein to change or remove features not included in the Historic England entry. 

More recent entries tend to be much more detailed. The disadvantage is that can limit what you can do with the property. The advantage is that you should start off with a much clearer idea of what parts of the building are important and which aren’t.

As most Listed buildings are over a century old and some much older, quite often their interiors will have been completely stripped out and replaced several times. If that’s the case, you might have the opportunity to put your own stamp on the surroundings. 

Listed building - living room


Understanding what you are dealing with

That’s why the priority has to be understanding what it is that’s important about the building. The listing, as we said, is a key source of information, as will be any previous Listed Building Consent or planning applications.

If what you want to do is extensive or there’s little available you're able to find out, you might need to get a historic building survey done. Once an expert eye has been run over the interior, you might learn that the ceiling decorations you thought you need to keep actually were added in the 1970s and can be eliminated but the plain skirting boards you never really noticed actually date back to the 1820s and so will need to be kept.

Listed building - kitchen

As a general rule of thumb, kitchens, bathrooms and utility rooms are the parts of a house that are easiest to modernise. But again, just because that is true most of the time does not mean that it is true in every case. There might be a bit of tiling that needs to be preserved - when in doubt, check.


Using original materials

Whether it’s inside or outside, when you are dealing with original parts of the building, you will need to use appropriate materials. So if the original windows had timber frames, then your new windows will need the same type of timber frame (and if your Listed house is 20th Century and has Crittall windows, you should be replacing them with the same kind of Crittall windows too).

Listed building - reception room

What you will not get away with are items designed to look Victorian or Georgian but mass-produced in plastic or MDF. Make no mistake, owning and maintaining a Listed building is never cheap (or simple).


Adding space

Councils know that the best way for any building to be looked after is it is in regular use. So they will be taking into account the balance between avoiding harm to a Listed building and allowing changes that will make it fit for modern life. 

That can include adding extra space. There are thousands of Listed buildings with extensions. The key things to think about are:


  • The extension must not hide any significant parts of the building

  • The extension should not look like it overwhelming the original building in any way

  • It needs to be a very high-quality design (we realise that’s quite subjective)

  • It will have to be built from appropriate high-quality materials.  If the idea is to match the main building, these need to be as close as possible to what was originally used - eg, real slate roof tiles not synthetic slate. If the idea is to go for a contrast, again, it needs to use excellent (and ideally, sustainable) materials.


If any of that sounds obvious, it’s worth saying that we have seen applications for extensions to Listed buildings from reputable firms that included uPVC windows. In our experience, the planning officers will always ask for the designs to be changed for non-plastic options, so you will save yourself some time by suggesting appropriate materials in the design from the start.


Can what you’ve done be undone?

Whether we are talking extensions or internal changes, perhaps the most important idea to keep hold of is reversibility. Whatever you do, you need to make sure it can be undone without harming the original fabric of the building. So if you are adding an extension, the only demolition involved should be of any much later extensions. 

Your addition has to be designed to be dismantled or demolished without chipping away at brickwork, for example. This is why quite radical additions to Listed houses – glass cube extensions, for example – are sometimes allowed. If in 50 years’ time, the Regency original house can remain intact while the 2020s changes are cleanly removed, you’re on the right track.

Get the right kind of help

We know that professionals are always telling you to use a professional rather than doing things yourself or hiring a mate. But with Listed buildings, you really do need to work with people who know what they are doing. Because, as we mentioned before but it’s worth repeating: making unauthorised changes to a Listed building is a criminal offence.

Listed Building Consent - architect drawings

So make sure that your architect, planning consultants and builders all have a solid track record with Listed buildings. If you are making extensive changes, or your house is Grade II* or Grade I, you should also use a historical building surveyor and get a heritage consultant involved. 

The bottom line: you often can do quite a lot to a Listed building, but you have to know exactly what you are working with and to do that, you need to hire experts.

Working with an architect -
Urbanist Architecture
Choosing a carpenter -
Institute of Carpenters
Choosing an interior designer -
JT Interiors
 Working with an architect checklist Choosing a carpenter Choosing an interior designer



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