Planning Rules for Listed Buildings and Historic Homes in Wales
Living in a listed building or owning a historic home in Wales is a privilege, but it also comes with responsibility. These properties are protected for their architectural or historic importance, which means that any alterations, extensions, or repairs often require extra planning considerations.
In this blog, we’ll walk you through what you can and can’t do with a listed property in Wales, the approvals you’ll likely need, and how to make changes the right way.
What Does “Listed Building” Mean?
A listed building is one that’s been placed on the Statutory List of Buildings of Special Architectural or Historic Interest. In Wales, listings are managed by Cadw, the Welsh Government’s historic environment service.
There are three grades:
Grade I: Buildings of exceptional interest (e.g. castles, cathedrals)
Grade II*: Particularly important buildings of more than special interest
Grade II: Buildings of special interest (this is the most common)
If your property is listed, the entire structure is protected — not just the front or key features. This includes interiors, outbuildings, walls, and sometimes even garden features.
Do I Need Planning Permission or Listed Building Consent?
Often, both may be required.
Listed Building Consent (LBC): Required for any changes that affect the character of the building — inside or out. This could be as simple as replacing windows or removing a fireplace.
Planning Permission: Required for extensions or changes to use — just as with any property — but your plans will be assessed in the context of the building’s historic value.
Even minor alterations can be a no-go without proper approval. Carrying out unauthorised work is a criminal offence, and can lead to enforcement action or even prosecution.
What Kind of Work is Typically Allowed?
Every case is different, but here are some examples of what’s usually acceptable when handled properly:
Sympathetic repairs using traditional materials
Internal layout changes that preserve key features
Discreet modern updates (e.g. plumbing or electrics) done sensitively
Extensions that contrast but don’t overpower the original architecture
However, anything that removes or hides historic fabric (like original windows, beams, or stonework) is likely to be refused or require significant justification.
What’s the Process?
Speak to a planning consultant early – we can help you identify risks and opportunities
Check with your local authority and Cadw – some councils offer pre-application advice
Submit a Listed Building Consent application – including drawings, heritage statements, and supporting evidence
Wait for a decision – this can take 8+ weeks, depending on complexity
Undertake work carefully – often under supervision or using specialist contractors
Need Help with a Listed Building Project?
At Clwydian Planning, we’ve supported homeowners and developers across North Wales with applications involving listed buildings and heritage assets. We understand the balance between protecting history and making homes liveable for modern life.
Whether you’re restoring a historic farmhouse, converting a chapel, or just want to upgrade your heating system — we’ll guide you through the process and ensure it’s done right.
Get in touch today for a no-obligation consultation.
