Knocking through walls to create open-plan living is one of the most popular home improvements in the UK right now. It transforms how a house feels and functions. But before any wall comes down, you need to know whether it’s load bearing — and if it is, you need proper structural engineering behind the decision.
Professional load bearing wall removal isn’t something a builder can assess on instinct alone. It requires structural calculations, a specified steel beam, and building regulations approval. Get this right and the result is a clean, open space with no structural compromise. Cut corners and you’re looking at cracked ceilings, subsidence risk, and a very difficult conversation with your insurer.
How Do You Know If a Wall Is Load Bearing?
The honest answer is: you often can’t tell just by looking. There are indicators, but none of them are definitive without a proper assessment.
Walls that run perpendicular to your floor joists are more likely to be load bearing. Walls sitting directly above one another on different floors are a strong indicator too. Internal walls that sit over a beam or on a foundation, or walls positioned centrally through the house, are all worth treating with caution.
The only reliable way to confirm is to have a structural engineer assess the wall — checking the construction drawings if they’re available, inspecting the roof structure, and reviewing what sits above and below the wall in question. In older UK homes, particularly Victorian and Edwardian terraces, the picture is rarely straightforward.
What Happens If You Remove a Load Bearing Wall Without Proper Support?
The structure above a load bearing wall needs to go somewhere when the wall is removed. Without an adequately sized steel beam and proper padstones transferring the load to the walls either side, that weight distributes in ways it wasn’t designed to handle.
In the short term, you might see cracking — first hairline, then more significant. Doors and windows in adjacent rooms start sticking. Floors above begin to deflect. In worse cases, the structure can start to settle in a way that’s expensive to undo and, in serious situations, dangerous.
The other practical problem: if you’ve removed a load bearing wall without building regulations approval, it becomes a material consideration when you sell the property. Solicitors will ask. If you can’t produce a completion certificate, the sale can stall or fall through.
What Does the Process Actually Involve?
A properly managed load bearing wall removal follows a clear sequence.
Structural assessment — A structural engineer visits the property, assesses the wall, and determines what load it’s carrying. This informs the beam specification.
Structural calculations — The engineer produces calculations specifying the steel beam size and grade required to carry the load safely. These calculations are submitted as part of the building regulations application.
Building regulations application — Before any work starts, a building regulations application needs to be submitted, either via a local authority building control or an approved inspector. The calculations and proposed methodology are reviewed.
Temporary propping — Once work begins, the structure above needs to be supported by temporary props while the wall is removed and the beam installed. This isn’t optional — the load has to go somewhere during the work.
Steel beam installation — The beam is installed, sitting on padstones or suitable bearing points. The size and bearing length will be specified in the engineer’s calculations.
Building control sign-off — Once the work is complete, building control inspects and, if satisfied, issues a completion certificate. That document is what you’ll produce when you sell.
What Size Steel Beam Do You Need?
This depends entirely on the span and the load above — and it’s not something that should be guessed at or lifted from a previous project.
A single-storey removal with nothing above other than a roof will carry significantly less load than a wall sitting beneath two further storeys and a roof. The engineer’s calculations will account for the span, the floor and roof loads, and the bearing conditions at either end.
Using an undersized beam — which can happen when structural input is skipped or treated as a formality — is one of the most common causes of post-removal problems. The beam deflects under load, cracks appear, and remediation typically costs far more than the original structural engineering fee would have.
Do You Need Planning Permission?
Internal load bearing wall removal is generally permitted development — it doesn’t require planning permission. Building regulations approval is different from planning permission, and it’s building regulations that apply here.
The exception is if you’re in a listed building. Listed building consent is required for works that affect the character or fabric of the building, and internal structural walls can fall within that. If your property is listed, check with your local authority before doing anything.
The Party Wall Consideration
If the wall you’re looking to remove is a party wall — a wall shared with a neighbouring property — the Party Wall etc. Act 1996 comes into play. You’ll need to serve notice on your neighbour before work starts and, depending on their response, potentially appoint a party wall surveyor.
Many homeowners don’t realise that internal works can trigger the Act. If the wall forms part of a shared structure, it does.
Choosing the Right Structural Engineer
Not every engineer who produces a beam calculation has experience with residential load bearing wall removals across different property types and construction eras. In London and the surrounding area, the variation between a 1900s terrace, a 1960s semi-detached, and a 1980s detached house is significant — the construction methods differ, the materials differ, and the structural behaviour differs.
AC Design Solution is a London-based multidisciplinary practice with over 10,000 UK projects delivered, providing structural engineering services alongside architectural design and party wall surveying. Their structural engineers handle load bearing wall removals across London, Essex, and the Home Counties, producing the calculations and drawings required for building regulations submission.
