GS Renovation converts lofts across Surbiton, in the Victorian villas and riverside houses spread through KT6 towards the Thames and Kingston. Many of these are semi-detached or detached, which brings a larger permitted development allowance and more roof to work with. We coordinate the structural engineer and complete under Kingston Council building control.
More roof to work with in a KT6 villa
Surbiton's Victorian and Edwardian villas tend to be taller and wider than the tight terraces closer to central London, which usually means the 2.2m to 2.4m of ridge height a conversion needs is comfortably there. Where the roof is hipped, squaring it into a gable recovers the width lost to the slope, and a rear dormer behind that produces full standing height across the back. On an already gabled roof, a rear dormer on its own is usually enough.
The extra size changes the layout options rather than the engineering. The new floor is still formed on joists sized by your structural engineer and carried on steel beams bearing on padstones, never on the existing ceiling joists. Longer spans mean heavier steels and more careful lifting, and on a detached villa the beams may bear on internal masonry rather than a party wall, which the engineer will specify. We build exactly to that specification.
Stairs, fire safety and consents in Surbiton
The stair is where a generous villa can still catch you out. Part K governs rise, going and headroom, and the flight has to land somewhere that does not destroy a first floor bedroom. A space-saver stair with alternating treads is only permitted where it serves a single room, so it is no help for a loft with a bedroom and en suite. Part B then requires that stair to form a protected route to a final exit, with fire doors and interlinked alarms.
Semi-detached and detached houses carry a 50 cubic metre permitted development allowance rather than the 40 given to terraces, subject to materials matching, no projection forward of the roof plane, no balconies and obscure glazed side windows. Conservation area designation in parts of KT6 removes those rights, so we check with Kingston Council. Where steels bear into a shared wall, the work is notifiable and you serve notice as building owner while we prepare the detail.
- Structural steel sized by the engineer and set on padstones
- En suite plumbing, drainage and mechanical extraction
- Rooflight conversions where the roof line must not change
- Velux and conservation rooflights fitted and flashed
- New floor joists independent of the existing ceiling
The GS Renovation Difference in Surbiton
Surbiton owners choose GS Renovation because bigger roofs mean longer spans, heavier steel and a stair that has to be planned properly, not squeezed in at the end. We coordinate the engineer, install the structure to specification, resolve the stair and fire strategy early and run Kingston building control to certificate. Registered in England, Companies House no. 14611254, and fully insured.
- Honest answer at survey if your roof will not take a conversion
- Photographs kept at each stage for your records
- Paperwork and certificates handed over for when you sell
- Free follow-up visit after completion if anything needs attention
- Roof type assessed so you get the scheme your house can actually take
- Interlinked mains alarms fitted and certified