House Extensions in Eltham
Eltham is one of South East London's most active extension markets — its interwar and post-war semi-detached stock, with generous plot widths, is ideal for side extensions, loft conversions and full-footprint rear additions.
rcbGroup projectHouse Extensions in Eltham — what to expect
SE9 interwar semis are the ideal extension candidate. Wide side passages allow for single or double-storey side extensions. Rear extensions of 3–6m are standard. Some of the larger detached plots in Eltham allow wraparound extensions. The Elizabeth line at Eltham station has added momentum to renovation activity.
Eltham property types
Interwar semi-detached and detached, bungalows, 1960s–80s estates. The property type affects which extension approach works best — we'll advise from the first call.
Common extension projects we deliver in Eltham
How we deliver extension projects in Eltham
Project review & site visit
We look at your Eltham 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 Royal Borough of Greenwich 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 Eltham
SE9 falls within the Royal Borough of Greenwich. Conservation areas apply around Eltham High Street and Eltham Palace. Verify PD status with RBG Planning, particularly on any property near the Palace or in the conservation zone.
Why choose rcbGroup in Eltham?
Local context
We plan around Royal Borough of Greenwich's requirements and the typical property types in Eltham — interwar semi-detached and detached, bungalows, 1960s–80s estates.
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 Eltham?
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: Eltham
Not sure if we cover your street? Get in touch — we'll confirm in minutes.
Start your Eltham project
Project review. Clear scope. Agreed price. One team from first call to Building Control sign-off.
Or call us on +44 7359 872594