Do I Need Building Control for a Kitchen Knock-Through?
A plain-English guide for Poole, Bournemouth and Christchurch homeowners on when a kitchen knock-through needs Building Control, structural calculations and a safer build route.
The short answer
You do not usually need planning permission just because you are removing an internal wall, but Building Control will normally matter if the wall is load-bearing, part of the fire escape route, or affects ventilation, drainage or structure. The safe first step is not demolition. It is to work out what the wall does, what has to replace it, and what evidence Building Control will expect before the opening is made permanent.
Why Building Control gets involved
Planning Portal guidance says building, removing or forming an opening in an internal wall will normally fall under Building Regulations. A kitchen knock-through can affect structure, fire separation, ventilation and the way loads travel down to foundations. If a steel beam, lintel, padstone or new bearing point is needed, Building Control needs enough information to confirm the finished work is safe.
What to check before anyone starts breaking out
Start with photos of both sides of the wall, the room above, the roof direction if visible, and any existing drawings. The next question is whether the wall carries floor, roof or chimney loads, or whether it is only a partition. In Poole, Bournemouth and Christchurch, many open-plan kitchen projects also need a check on drains, electrical routes, heating pipework and how smoke escape will work once the layout is opened up.
The usual safe route
A sensible kitchen knock-through route is: site or photo review, measured floor plan, structural engineer calculation where the wall may be load-bearing, Building Control application or notice where required, then builder pricing based on the agreed opening, temporary support, steel, making-good and kitchen-ready finish. That sequence gives the builder and inspector the same information before the wall comes down.
When to get help
Get help before demolition if the wall supports anything above, the opening is wider than a simple doorway, the property is older or altered, the kitchen will move services, or you are not sure how the new open-plan space will be finished. Send PlanBuild the address, photos and a short note on the kitchen layout you want, and we can point you at the right drawing, structural and Building Control route before you commit to a builder price.
Written by the PlanBuildCo team
9 years designing extensions and renovations in Poole, Dorset.
Ready to take the next step?
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