GS Renovation designs and builds extensions across Balham, working with the bay-fronted Victorian and Edwardian terraces that define SW12. Side-return infills, rear extensions and loft-to-ground reconfigurations are our daily work here. With 30+ years across Wandsworth, we take a Balham extension from foundations and steelwork through to a fully fitted, building control signed-off finish.
Side-return extensions on Balham terraces
Balham's terraces almost all have a narrow side return running alongside the rear closet wing, and infilling it is the classic way to widen a cramped kitchen into a bright kitchen-diner. We dig and pour the foundations, tie the new structure into the existing solid brick wall, install the steel beams that carry the original rear wall and build up with a mix of solid roof and rooflights to pull daylight deep into the plan.
A single-storey rear or wrap-around extension on these plots often falls under permitted development, but not always. Conservation area status, previous additions, the closet wing and how close you build to the boundary can all tip a project into needing a full planning application to Wandsworth Council. We assess your specific house early, advise honestly on which route applies and prepare the drawings either way so there are no surprises.
Double-storey extensions in SW12 homes
Where a family needs a bedroom and bathroom as well as more ground-floor space, a double-storey rear extension over the closet wing can transform a Balham terrace. This is bigger structural work, with heavier steel, deeper foundations and a roof that must marry into the existing Victorian roofline, so it almost always requires planning permission from Wandsworth Council rather than falling under permitted development.
Because the flank and rear walls are usually shared with neighbours, party wall notices come into play alongside the building regulations that govern the structure, insulation, drainage and fire safety. We manage the whole chain: engineer, planning drawings, party wall coordination, groundworks, steel, roofing and the full internal fit-out. One accountable team means the Balham extension is delivered to a single standard, on a single programme, from first dig to final decoration.
- Loft conversions and roof works
- Planning permission and permitted development
- Foundations, groundworks and steel frames
- Full fit-out, finishing and making good
- Architectural drawings and structural coordination
The GS Renovation Difference in Balham
Balham families choose GS Renovation because we understand exactly how these terraces are built, from the side return to the closet wing to the shared party walls. We advise clearly on permitted development versus a Wandsworth planning application, handle foundations, steel, roofing and fit-out under one roof, and back every job with building control sign-off and 30+ years of local experience.
- Free, no-obligation quotations
- Over 30 years of hands-on experience
- Dedicated project management
- Fully insured and guaranteed work
- Building control and planning support
- Clean, tidy and reliable tradespeople