House Extensions in Clapham
rcbGroup delivers loft conversions, rear extensions, full house refurbishments, and structural alteration works across Clapham, Clapham South, and the SW4 and SW11 postcode areas. Clapham is one of south London's premium residential addresses, and the quality of its Victorian and Georgian housing stock reflects that. The area attracts homeowners who invest seriously in the maintenance and improvement of properties they often intend to own for many years. We
rcbGroup projectHouse Extensions in Clapham — what to expect
rcbGroup delivers rear extensions, side returns, and double-storey extensions across Clapham.
Clapham property types
in this area. The property type affects which extension approach works best — we'll advise from the first call.
Common extension projects we deliver in Clapham
How we deliver extension projects in Clapham
Project review & site visit
We look at your Clapham property and any drawings you have, explain what's possible, the likely planning and Building Regulations route, and the risks — before you commit to anything. No obligation.
Design & planning support
We work alongside your architect or our preferred design partners to develop drawings that are buildable, compliant, and cost-effective. We flag planning and permitted development options early.
Itemised scope and price
You receive a detailed, itemised scope of works and an agreed price before we start, with exclusions and provisional sums shown. Variations are agreed in writing before any additional work begins.
Managed delivery
We coordinate trades, procurement and site logistics, with a single point of contact throughout — working to the requirements of Local Authority and Building Control.
Sign-off & handover
We coordinate the Building Control inspections needed for sign-off, then hand over your project documents — completion certificate, guarantees and manuals as applicable — with snagging and aftercare as set out in your contract.
Planning in Clapham
**Full house refurbishments.** We manage comprehensive whole-house refurbishments for Clapham homeowners — structural alterations, rewiring, new heating systems, kitchens, bathrooms, flooring, and decoration, often combined with loft or extension work. **Structural alterations.** Ground-floor recon
Why choose rcbGroup in Clapham?
Local context
We plan around Local Authority's requirements and the typical property types in Clapham — in this area.
Price agreed before start
Your price is agreed and documented before work starts. Scope, exclusions, and assumptions set out in writing.
One accountable team
Trades, suppliers and inspections coordinated by one team — with CDM Principal Contractor duties taken on where we are appointed to build.
Written project documentation
A written contract before work starts, a Construction Phase Plan where we are appointed to build, and the completion certificate and handover documents gathered for you at the end.
Independently reviewed
Rated 10/10 from 117+ reviews on Checkatrade, where you can read them for yourself.
Support from planning to aftercare
We don't just build — we can support design development, planning applications, and pre-construction cost planning.
Planning an extension in Clapham?
Pick whatever suits you. We'll look at what you have (drawings, photos or quotes) and tell you honestly what the next step should be.
Prefer to phone? Call +44 7359 872594.
Postcodes served: Clapham
Not sure if we cover your street? Get in touch — we'll confirm in minutes.
Start your Clapham project
Project review. Clear scope. Agreed price. One team from first call to Building Control sign-off.
Or call us on +44 7359 872594