GS Renovation converts lofts across the London Borough of Sutton, on the interwar semis and leafy suburban streets running from SM1 out towards Cheam, Carshalton and Beddington Park. Hipped roofs and generous plots make hip to gable with a rear dormer the standard scheme here. We coordinate the structural engineer and manage Sutton Council building control.
How a Sutton loft conversion actually runs
Most families stay in the house while the work happens, so the sequence matters. Scaffold goes up first, then the roof is opened and made weathertight in stages rather than stripped in one go. Steel beams sized by the structural engineer are lifted in and set on padstones, the new floor joists are laid clear of the old ceiling, and the dormer and gable are framed and clad. Only then do we cut the new stair through the ceiling below, which keeps the dust and disruption inside a short window.
First fix, insulation, plasterboard and the bathroom follow, then the fire doors, the alarms and the decoration. A hip to gable with a rear dormer runs roughly £55,000 to £80,000 on indicative London ranges for 2026, with an en suite adding roughly £8,000 to £15,000. Removing the old cold water tank and moving to a combi boiler or an unvented cylinder is normally part of the enabling work rather than an optional extra.
Consents and inspections with Sutton Council
Semi-detached and detached houses are commonly cited as having 50 cubic metres of added volume available under permitted development, against 40 for a terrace, subject to conditions on matching materials, obscure glazed side windows, no balconies and nothing forward of the existing roof plane. Sutton Council has conservation areas, including around Carshalton and parts of Cheam, where those rights are removed and a planning application is needed instead.
Building regulations apply on every conversion. Sutton building control checks the steelwork and bearings, the floor structure, the protected stair with fire doors and interlinked alarms under Part B, the stair geometry under Part K, and the insulation and ventilation. The steels bearing into the wall shared with your attached neighbour also make the job notifiable under the Party Wall etc. Act 1996, which you serve as the building owner with our information behind it. We book each inspection at the stage the inspector needs to see it, so nothing is covered up before it has been signed off.
- Protected stair enclosure and fire doors to Part B
- L-shaped dormers over a rear closet wing
- Head height and ridge survey before design
- Party Wall notices prepared for the building owner to serve
- Water tank removal and conversion to a sealed system
The GS Renovation Difference in Sutton
Sutton homeowners choose GS Renovation because we run the job in a sequence that keeps an occupied family house liveable, and we do not leave the structure, the fire strategy or the paperwork to chance. Engineer coordinated, steel installed to design, party wall notices prepared, Sutton Council building control managed to certificate. Insured, certified, and fully documented for when you come to sell.
- Honest updates if a date or a detail has to move
- Party Wall notices prepared for steels bearing into a shared wall
- Water tank removed and the system converted where it blocks the space
- Free follow-up visit after completion if anything needs attention
- A dedicated project manager from first survey to handover
- Roof type assessed so you get the scheme your house can actually take