GS Renovation designs and builds extensions across Deptford, adding space to the Georgian and Regency townhouses and converted warehouses of SE8. With over 30 years of experience in South East London, we handle everything from foundations and steel beams to roofing and full fit-out, guiding you through permitted development or a planning application to Lewisham Council.
Rear and side-return extensions in Deptford
The classic Deptford extension fills in the side return or pushes out the rear of a period townhouse to create a bright, open kitchen-diner. We dig and pour foundations to suit the ground and any nearby trees, then build up in brick or blockwork to match the existing property. A steel beam, sized by the engineer, usually carries the original rear wall so the new and old spaces flow together as one room.
Many single storey rear extensions on Deptford houses fall under permitted development, which avoids a full planning application. However, if your townhouse is listed, sits in a conservation area or you plan a larger or double storey addition, you will need planning permission from Lewisham Council, and listed building consent where relevant. We assess your specific property early and advise honestly on which route applies before any drawings are finalised.
Building extensions on Deptford's period plots
Deptford's Georgian and Regency plots vary widely, from generous gardens near Telegraph Hill to tight urban footprints closer to the creek and the high street. We plan each extension around the space you actually have, the fall of the drains and the position of any shared boundary. Where the new foundations run alongside or beneath a neighbour's wall, the Party Wall Act applies, and you serve the required notices before the groundworks begin.
Structural work such as foundations, beams and the opening between old and new is controlled under building regulations, with building control inspecting at key stages. This is separate from planning permission, which governs whether you may build at all. We coordinate both, then complete the roof, windows, insulation, wiring, plumbing and internal finishes so you receive a finished, signed-off room rather than a shell that still needs trades.
- Drainage diversion and build-over agreements with the water authority
- Scaffolding, site set-up and safe access on tight London plots
- Steel goalpost frames where the rear wall opens up
- Foundations, groundworks and steel frames
- Trial holes to set foundation depth near drains and trees
Why Deptford Homeowners Choose GS Renovation
Homeowners across SE8 choose GS Renovation because we deliver the whole extension under one roof, from Lewisham planning advice to steelwork, roofing and decoration. We are used to working sensitively on period and listed townhouses, keeping the new addition faithful to the original house, and our 30-plus years mean fewer surprises and a genuinely finished result.
- One point of contact on the phone, not a call centre
- Drainage diverted or built over with the right approval in place
- Brick and mortar matched to the existing elevation
- Rated 4.9 from 31 reviews on MyBuilder
- Founder-led team with 30+ years of hands-on experience
- Weathertight shell reached before the fit-out begins