GS Renovation carries out structural alterations throughout Bermondsey's converted warehouses and new-build apartments across SE16. New openings, replacement joists, supported openings and underpinning where ground conditions demand it, all engineer-designed and building-control certified. With 30+ years in Southwark, we deliver structural change that stands up to leasehold scrutiny and the surveyor's report.
Structural alterations in Bermondsey conversions
Warehouse conversions near the river present their own structural puzzles: heavy original floor joists spanning long distances, cast-iron or steel columns left in from the industrial fit-out, and thick masonry party structures shared between flats. Forming a new opening through one of these, or replacing tired joists in a top-floor apartment, is precise work that begins with an engineer calculating the spans, the point loads and how the new steel will bear onto sound masonry.
Every supported opening we form is temporarily propped, cut in staged sections and closed with a beam onto padstones so the load transfers cleanly. On the lower ground and basement levels found in some SE16 buildings, alterations occasionally call for localised underpinning where foundations meet the demands of the change. We stage that carefully in bays, keeping the structure stable throughout.
Leasehold consent and Southwark building control
Because Bermondsey flats are leasehold, structural alterations need the freeholder's licence to alter, and the managing agent will expect full engineer's drawings and a method statement before granting it. Where a wall or party structure is shared with the neighbouring flat, the Party Wall Act can also apply and notice is served. We prepare and manage all of this so consents are in place before we start, not chased halfway through.
Internal structural alterations are governed by the Building Regulations rather than planning permission, which only applies to exterior changes on the many listed and conservation-area warehouses near the Thames. Southwark Council's building control inspects the steelwork, bearings and any underpinning at the right stages and issues the certificate. We reinstate acoustic separation between flats so your alteration meets both the regulations and your lease.
- Steel goalpost and portal frames to the engineer's design
- Lintel replacement and repair over failed openings
- Steel beam and RSJ installation
- Building control applications and completion certification
- Trial holes to confirm foundation depth and ground conditions
Why Choose GS Renovation in Bermondsey
Homeowners across Bermondsey trust GS Renovation because structural alterations in leasehold flats demand more than good building. We coordinate the engineer, the freeholder's licence to alter and Southwark building control as one accountable team, working tidily in occupied SE16 apartments and standing behind a fully certified result, backed by 30+ years.
- Load paths carried properly down to foundations
- Photographs kept at each stage for your records
- Every alteration certified rather than quietly built over
- Building control applications and inspections coordinated for you
- Neighbours given notice before the noisy stages
- Our own trades on site rather than a chain of subcontractors