GS Renovation works throughout Bermondsey, and we will give you a straight answer on lofts here. SE16 is dominated by warehouse conversions and new-build riverside apartments, and in that stock a loft conversion is usually not possible. Where there is a house with a usable roof space, we build it properly with Southwark Council building control.
Why most Bermondsey flats cannot be converted
In a warehouse conversion or a purpose-built riverside block, the roof space above your flat is almost never yours. It belongs to the freeholder, and even a top-floor leaseholder needs a formal grant of the airspace plus freeholder consent before anything can be designed, let alone built. Add a shared structure, communal escape routes and a block insurer with a view on the matter, and the honest position for most SE16 apartments is that a loft conversion will not happen.
What is achievable in these properties is different work: internal structural alterations, removing a non-original partition with a steel beam where the slab and frame allow it, reworking a mezzanine, upgrading fire separation, or a full refurbishment of a warehouse shell. We would rather tell you that at the survey stage than take a deposit for a project that consent will kill. If your building manager confirms otherwise, we are happy to look again.
Loft work on Bermondsey houses that do have a roof space
Where you own a house near Borough Market or in the older terraced pockets away from the river, the usual options apply. We measure the ridge height first, because roughly 2.2m to 2.4m of existing height is what makes a conversion viable without raising the roof. A rear dormer, or an L-shaped dormer where there is a closet wing, gives the volume; a rooflight scheme is the cheapest route where the height is generous and no extra volume is needed.
Southwark Council handles both planning and building control here, and parts of Bermondsey are conservation area, which removes permitted development rights for dormers. Building regulations apply regardless: Part B fire safety with a protected stair to a final exit, Part K for the new stair, engineer-sized floor joists and steel beams bearing on padstones, and insulation and ventilation to Part L. Indicative London ranges in 2026 run around £45,000 to £65,000 for a rear dormer.
- Rooflight conversions where the roof line must not change
- Mansard conversions where planning will not accept a dormer
- Interlinked mains-powered smoke alarms
- Water tank removal and conversion to a sealed system
- Trussed roofs redesigned before any web is cut
Trusted Loft Conversion in Bermondsey
Bermondsey clients come to GS Renovation for an honest assessment before money is spent. We tell you plainly when a conversion in an SE16 flat is a non-starter and show you what is genuinely possible instead. On houses we coordinate the engineer, party wall paperwork and Southwark building control as one job, fully insured, with free no-obligation quotations.
- A written scope and programme agreed before work starts
- Interlinked mains alarms fitted and certified
- Roof made good, leadwork and guttering finished properly
- Aftercare and snagging support once the job is finished
- Registered in England, Companies House no. 14611254
- Honest answer at survey if your roof will not take a conversion