Thinking about opening up your home? Before you pick up a sledgehammer, it's worth understanding exactly what permissions and approvals you need and which ones you don't.
Removing internal walls is one of the most popular home improvement projects in the UK right now. Whether you're dreaming of an open-plan kitchen-diner, a brighter living space, or just better flow between rooms, knocking through a wall can completely transform how your home feels. But one of the first questions homeowners ask is: do I need planning permission to do this?
The short answer? In most cases, no. But the longer answer comes with some important nuances and getting it wrong can be costly.
Before we dive in, it's important to understand the distinction between two separate regulatory frameworks, because they're often confused:
Primarily concerned with how a building looks from the outside, how land is used and how development affects the surrounding area. It's what you'd need for an extension, a new outbuilding, or changing the use of a property.
Building regulations are about safety and structural standards. They govern the technical aspects of construction, from structural integrity and fire safety to drainage and energy efficiency. They apply to internal work in ways that planning permission typically doesn't.
When it comes to removing internal walls, it's usually building regulations, not planning permission, that you need to think about.
For most homeowners in the UK, planning permission is not required to remove internal walls. As part of Section 55 of the Town and Country Planning Act, internal alterations are not classified as 'development', which means they fall outside the scope of planning permission in the vast majority of cases.
This applies whether you're removing a partition wall in a Victorian terrace, opening up a bungalow, or reconfiguring rooms in a new build.
However, there are some important exceptions.
If your home is a listed building, the rules are significantly stricter. You will almost certainly need listed building consent that affect the building’s character before making any internal alterations, including removing walls, altering historic features such as fireplaces, panelling, staircases or decorative mouldings, or other historic fabric. Even apparently minor works can require consent, so specialist advice should be taken before proceeding.
This isn't a minor procedural step. Carrying out work on a listed building without the required consent is a criminal offence, so it's absolutely essential to get specialist advice before proceeding.
If your property is in a Conservation Area, internal wall removal will not normally require planning permission unless the work also affects the building’s external appearance. Article 4 Directions usually restrict specific permitted development rights, most commonly external alterations, so they are unlikely to affect purely internal wall removal. However, it is still worth checking with the local planning authority if your property is in a sensitive location, especially if any external changes are proposed.
If you own a flat or leasehold property, your lease may contain specific restrictions on structural alterations. You'll likely need consent from your freeholder or management company, separate from any planning or building control requirements. Always review your lease carefully before proceeding.
Even where planning permission isn't required, building regulations approval is often needed, and this is where most homeowners need to focus their attention.
Whether you need approval depends largely on one key question: is the wall load-bearing?
A load-bearing wall is one that supports the structure above it, transferring the weight of floors, roofs, and other walls down to the foundations. Common examples include:
These walls are fundamental to your home's structural integrity. Removing one without the proper support and approval in place can lead to serious and potentially dangerous, consequences, including sagging ceilings, cracked walls, and in the worst cases, structural collapse.
Also known as partition walls or stud walls, non-load-bearing walls are typically lightweight timber or metal frame constructions clad in plasterboard. Their sole purpose is to divide rooms, they don't carry any structural load.
In most cases, removing a non load bearing wall does not require building regulations approval, provided the work does not affect fire safety, escape routes, ventilation, drainage, electrics or other regulatory work. There are sometimes exceptions, and it's always wise to have a professional confirm this before proceeding.
Back to topRemoving a load-bearing wall is classified as notifiable work under the Building Regulations because it alters the structure of the property. This means you must apply for building control approval before any work begins.
The process typically involves:
The beam must normally have at least 150mm bearing onto the supporting walls on each side of the opening, and the walls beneath may need to be strengthened with padstones to spread the load. If the beam is steel, it will also need to be fire-protected to provide at least 30 minutes' fire resistance.
Even when removing a non-load-bearing wall, you may still need building regulations approval if the work has fire safety implications. This is particularly relevant when:
If you're unsure whether your wall has fire safety implications, a building control body can advise you before you start.
If the work affects a wall shared with a neighbouring property, such as cutting into a party wall to insert a beam, altering a chimney breast, or carrying out certain excavations nearby, the Party Wall etc. Act 1996 may apply. In that case, formal notice may need to be served on the adjoining owner before work begins
Skipping building regulations approval might seem like a way to save time or money, but the consequences can be significant:
The completion certificate issued at the end of the process is an important document to keep safe, both for your own peace of mind and for any future sale.
|
Situation |
Planning Permission |
Building Regs Approval |
|
Removing a non-load-bearing wall (standard home) |
No |
Often no (check fire safety) |
|
Removing a load-bearing wall (standard home) |
No |
Yes — required |
|
Internal alteration in a listed building |
Yes (listed building consent) |
Usually Yes |
|
Property in a conservation area / Article 4 |
Often no |
Depends on work |
|
Party wall involved |
No (but Party Wall Act applies) |
Depends on work |
|
Flat or leasehold property |
Check lease / freeholder |
Depends on work |
Removing an internal wall is one of the most effective ways to transform a home, unlocking space, improving flow, and flooding rooms with natural light. In most cases, you won't need planning permission, but you will need to think carefully about building regulations, structural safety, and fire protection.
The key steps are: find out whether your wall is load-bearing, understand the building regulations implications, and get the right professionals involved before any work begins.
At Marraum, we work with homeowners across Cornwall to make exactly this kind of project straightforward and stress-free. From initial feasibility through to full building regulations submissions, our team has the expertise to guide you through every step, so your home transformation happens safely, legally, and beautifully.
Ready to open up your space? Get in touch with the team at Marraum for a free initial consultation.
Planning permission doesn't have to be stressful, it needs to be handled correctly
Whether you're just starting to think about an extension, or you've already got a project in mind and want to know where you stand, Marraum is here to help. As RIBA Chartered Architects based in Cornwall, we have achieved a 99% approval rate across more than 600 projects, and we are ready to help you achieve the same.
Start your project with Marraum