House Extensions in Lee
Lee is a quiet, established South East London neighbourhood in the SE12 postcode — popular with families for its good schools, green spaces around Lee Green and the Manor House Gardens, and mix of Victorian, Edwardian, and inter-war housing. rcbGroup delivers loft conversions, extensions, and full refurbishments across SE12.
rcbGroup projectHouse Extensions in Lee — what to expect
Lee's housing stock offers good scope for rear extensions. Ground floor rear extensions on Victorian and Edwardian terraces in SE12 open up the typical narrow rear kitchen into open-plan space. Permitted development at 3–6m applies to most residential properties. Side extensions and structural openings frequently accompany extension work, combining into a single contract.
Lee property types
Victorian and Edwardian terraces, inter-war semis, some detached properties. The property type affects which extension approach works best — we'll advise from the first call.
Common extension projects we deliver in Lee
How we deliver extension projects in Lee
Project review & site visit
We look at your Lee 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 Lewisham 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 Lee
Lee falls under Lewisham Council. Most residential streets in SE12 have standard permitted development rights for extensions and loft conversions. Conservation areas exist in parts of the wider SE12 postcode — confirm designation at pre-construction. Manor House Gardens and surrounding streets may have tree preservation orders affecting external works.
Why choose rcbGroup in Lee?
Local context
We plan around London Borough of Lewisham's requirements and the typical property types in Lee — victorian and edwardian terraces, inter-war semis, some detached properties.
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 Lee?
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.
Start your Lee project
Project review. Clear scope. Agreed price. One team from first call to Building Control sign-off.
Or call us on +44 7359 872594