GS Renovation works on lofts in Vauxhall, where SE11 mixes Georgian and early Victorian terraces with modern riverside apartment blocks. In the houses a conversion is often achievable with planning permission; in the flats it usually is not. We are clear about which yours is before any money is spent on drawings.
Georgian terraces, conservation areas and mansards
The older Vauxhall and Kennington terraces are handsome, tightly built and largely covered by Lambeth's conservation areas, with a number of individually listed buildings among them. Conservation designation removes permitted development rights for loft alterations, and listing adds a separate consent on top, so a planning application to Lambeth Council is the normal route. A flat-roofed box dormer on a parapet-fronted Georgian terrace is not a proposal that tends to succeed.
A mansard is the form these roofs were built to accept, rebuilt at a steep pitch behind the parapet with dormer windows in a traditional pattern. It gives more volume than any other type and costs the most, roughly £70,000 to £100,000 or more as an indicative London range for 2026. Where the existing void is already tall enough, conservation rooflights with an internal fit-out are the least contentious option, at roughly £30,000 to £45,000.
Riverside flats and the build in an SE11 house
The apartment blocks along the river are a different matter. The roof is common structure belonging to the freeholder, the lease does not extend above your ceiling, and most of these buildings have flat roofs carrying plant with no void to convert at all. We will say so at the survey. Inside the flat itself, structural alterations, layout changes and full refurbishment are achievable with the freeholder's licence to alter and Lambeth Council building control.
In a house, the sequence is engineer first, then structure. Steel beams span between the party walls onto padstones to carry the new floor and the mansard or dormer above, with the old ceiling joists left carrying nothing but the ceiling. Part B demands a protected stair to a final exit in a tall terraced house, Part K governs the stair itself, and the Party Wall etc. Act applies to both neighbours, with the notices served by you as building owner.
- New floor joists independent of the existing ceiling
- Dormer cheeks, flat roof and leadwork detailed to last
- Party Wall notices prepared for the building owner to serve
- Insulation between and over rafters to Part L
- Water tank removal and conversion to a sealed system
Why Choose GS Renovation in Vauxhall
Vauxhall owners choose GS Renovation because SE11 rewards a contractor who knows the difference between what a lease allows and what a planning officer will accept. We coordinate the engineer and designer, build the structure, and run Lambeth Council building control and the party wall detail. Founder Abdelaaziz Saaid has 30+ years of hands-on experience behind him, and we quote free of charge.
- Water tank removed and the system converted where it blocks the space
- Waste cleared as we go, not left piled in the garden
- Materials priced at options, so you choose the finish
- Building control applications and inspections coordinated for you
- Founder-led team with 30+ years of hands-on experience
- Roof made good, leadwork and guttering finished properly