Kitchen extensions that transform how you live.
Open-plan kitchen extensions, structural knock-throughs and bespoke kitchen renovations. Design, structural works and build — managed by RCB from concept to completion.
The kitchen extension. Done properly.
A kitchen extension is one of the most popular and most impactful home improvements in London. When done properly, it transforms daily life — creating open, light-filled living and cooking spaces that work for families, for entertaining and for everyday use.
The key is proper structural management. Load-bearing wall removal, steel beam installation and correct roof design are non-negotiable elements of a kitchen extension done to a professional standard.
RCB manages the complete kitchen extension process — from initial feasibility and structural assessment through planning, Building Regulations, structural build, internal fit-out, kitchen installation and final handover.
What's included
Kitchen extensions are one of the highest-return home improvements in London
How It Works
The RCB process for this service.
Initial Assessment
We assess your property, the structural requirements for wall removal, and the planning position for your extension.
Design & Approvals
Architectural design, structural calculations, planning or PD assessment and Building Regulations submission.
Estimate & Programme
A detailed estimate covering every element — structure, roof, glazing, electrics, plumbing, kitchen, flooring and finishing.
Build & Complete
RCB manages structural works, extension build, internal fit-out and kitchen installation through to final handover.
Planning & Regulations
Kitchen extensions involving rear or side extensions require Building Regulations approval. Structural alterations (wall removal, steel beam installation) require structural calculations. Extensions beyond Permitted Development limits require planning permission. Utility works, drainage and underfloor heating installations have their own compliance requirements. RCB coordinates all relevant approvals and inspections.
FAQs
Common questions.
Can I remove a load-bearing wall in my kitchen without an extension?
Yes — many clients remove load-bearing walls to open up existing kitchen and dining areas without extending. This requires structural calculations, Building Regulations notice and installation of a structural steel beam. RCB coordinates this as a standalone service.
What glazing options are available for kitchen extensions?
Common options include bi-fold doors, sliding doors, roof lanterns, structural glass roofs, and large fixed-frame windows. RCB advises on the options best suited to your extension design and budget.
Can RCB supply and install the kitchen?
Yes. RCB can coordinate kitchen supply and installation as part of the overall project, or work alongside a separate kitchen supplier of your choice.
How long does a kitchen extension take?
A typical single-storey rear kitchen extension takes 10–16 weeks from site start. Add 8–16 weeks for pre-construction (design, planning, Building Regulations). Kitchen installation typically takes 2–3 weeks within the overall programme.
Do I need planning permission for a kitchen extension?
Many single-storey rear extensions fall within Permitted Development rights and do not require a planning application, subject to size limits and conditions. Extensions in conservation areas or those exceeding PD limits require full planning permission. RCB assesses your specific situation and advises on the correct route.
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