GS Renovation designs and builds extensions across Eltham, where 1930s semi-detached and interwar houses sit on the generous plots that make expansion possible. With over 30 years of building experience in SE9 and the Royal Borough of Greenwich, we handle foundations, steelwork, roofing and the full fit-out as one accountable project.
Rear and side extensions on Eltham plots
The deeper gardens and wider side accesses common to Eltham's interwar houses lend themselves well to rear and side-return extensions. A single storey rear extension can turn a cramped kitchen into an open-plan kitchen-diner, while filling in the side passage widens the whole ground floor. We start with proper foundations and groundworks suited to the local soil, then bring in steel beams where the original external wall is opened up into the new space.
Double storey and wrap-around extensions add bedrooms and en-suites above the new ground floor, making the most of these family homes without moving out of the area. We manage the roof works, whether a pitched roof to match the existing house or a flat roof to a rear projection, and carry the project through to a finished, decorated interior with kitchen, bathroom and services all in place.
Planning and party walls in SE9 extensions
Whether your Eltham extension is permitted development or needs a full planning application depends on the property, its size and what has been built before. Many single storey rear extensions on interwar semis fall under permitted development, but larger projects, work to the front, or anything affecting the street scene may need permission from the Royal Borough of Greenwich. We advise honestly on which route applies to your SE9 home before any drawings are finalised.
Because Eltham semis usually share a party wall, extending near that boundary or building on a shared foundation brings the Party Wall Act into play, and notice must be served on your neighbour. Separately, the structural work itself, including the steel beams and new foundations, is controlled under building regulations and inspected by building control. We keep planning, party wall and building regs matters clearly separate and properly handled.
- Full fit-out, finishing and making good
- Roof works and structural alterations at roof level
- Steel goalpost frames where the rear wall opens up
- Party Wall Act notices for excavation near a neighbour's wall
- Building control inspections at foundation, damp course and steel stages
Why Eltham Homeowners Choose GS Renovation
Eltham families choose GS Renovation because we build extensions that suit the interwar house, not a generic box. One team handles groundworks, steel, roofing and fit-out, advises whether you need planning or fall under permitted development, and manages party wall notices with neighbours. Backed by 30+ years in SE9 and across the Royal Borough of Greenwich, we deliver space you can actually use.
- Rated 4.9 from 31 reviews on MyBuilder
- Building control inspected at foundation, damp course and steel stages
- Party Wall notices served for excavation near a neighbour's wall
- Foundation depth set after trial holes, drains and trees are checked
- A written scope and programme agreed before work starts
- One point of contact on the phone, not a call centre