House Extensions in Mitcham
Mitcham in CR4 offers some of the best extension value in South London — generous plot sizes, affordable entry prices relative to surrounding areas, and good connectivity via tram and road links. rcbGroup delivers extensions, loft conversions, and refurbishments across Mitcham and the surrounding CR4 area.
rcbGroup projectHouse Extensions in Mitcham — what to expect
Mitcham's mix of Victorian terraces and interwar semis provides solid extension opportunities. Ground floor rear extensions at 4-6m are the most common project type — opening up the rear of the house into a modern open-plan kitchen-diner. The wider plots on interwar semis in Mitcham suit side extensions as well as rear extensions, and the scale of gardens in many CR4 streets allows more generous extension footprints than equivalent inner London properties.
Mitcham property types
Victorian and Edwardian terraced houses, interwar semis and detacheds, some newer build. The property type affects which extension approach works best — we'll advise from the first call.
Common extension projects we deliver in Mitcham
How we deliver extension projects in Mitcham
Project review & site visit
We look at your Mitcham 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 London Borough of Merton 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 Mitcham
Mitcham sits within the London Borough of Merton. Most residential streets in CR4 have standard permitted development rights. Parts of the area near Mitcham Common have specific planning considerations. Check your specific address for conservation area status and permitted development restrictions before proceeding.
Why choose rcbGroup in Mitcham?
Local context
We plan around London Borough of Merton's requirements and the typical property types in Mitcham — victorian and edwardian terraced houses, interwar semis and detacheds, some newer build.
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 Mitcham?
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: Mitcham
Not sure if we cover your street? Get in touch — we'll confirm in minutes.
Start your Mitcham project
Project review. Clear scope. Agreed price. One team from first call to Building Control sign-off.
Or call us on +44 7359 872594