GS Renovation builds loft conversions in Wimbledon, on the Victorian villas and period family houses between the Common and the town. Tall roofs make SW19 good territory, though conservation areas around the Village shape what can be built. We coordinate the engineer, build the structure and run Merton Council building control to sign-off.
Villas, terraces and what SW19 roofs allow
The larger Victorian and Edwardian villas near the Common tend to have deep roofs and often a hipped or half-hipped flank. Building that hip up to a gable and adding a rear dormer produces the most usable floor, frequently enough for two rooms and a bathroom. On the terraced streets closer to the station, a surviving rear closet wing points to an L-shaped dormer, which uses the awkward junction of two roof slopes instead of leaving it wasted.
Height comes first, as always: roughly 2.2m to 2.4m from the top of the ceiling joists to the underside of the ridge. Most SW19 period houses have it. Indicative London ranges for 2026 put hip to gable with a rear dormer and an L-shaped dormer both at roughly £55,000 to £80,000, a plain rear dormer at roughly £45,000 to £65,000, and a rooflight conversion at roughly £30,000 to £45,000 where you want the least intervention.
Merton Council consents and the technical work
Wimbledon Village and several streets around it fall inside conservation areas, and permitted development rights for loft alterations do not apply there. A full application to Merton Council follows, and a mansard or carefully proportioned dormers usually read better to an officer than a full-width box. Outside those areas the commonly cited allowances of 40 cubic metres on a terrace and 50 on a semi or detached house apply, with the usual conditions, and we confirm the designation before anything is drawn.
Building regulations do not vary with designation. Merton building control inspects Part B fire safety with a protected stair route to a final exit, Part K on the new stair, the engineer's steel spanning between party or flank walls onto padstones, the new floor joists and the insulation. Removing the old water tank and moving to a combi or an unvented cylinder is common enabling work. Party wall notices, where walls are shared, are served by you as building owner.
- Mansard conversions where planning will not accept a dormer
- Staircase design to Part K, including the landing below
- Rooflight conversions where the roof line must not change
- Interlinked mains-powered smoke alarms
- Insulation between and over rafters to Part L
The GS Renovation Difference in Wimbledon
Wimbledon owners choose GS Renovation because SW19 houses deserve structural work done properly and finishes that match the rest of the house. One team handles the engineer, the steel, the roof, the stair, the en suite and Merton Council building control. Founder Abdelaaziz Saaid brings 30+ years of hands-on experience to period roofs. The firm is fully insured and quotations are free.
- A written scope and programme agreed before work starts
- New floor structure carried on steel, never on the old ceiling joists
- Building control applications and inspections coordinated for you
- Party Wall notices prepared for steels bearing into a shared wall
- Protected stair route and fire doors detailed to Part B
- Waste cleared as we go, not left piled in the garden