Structural alterations in Southwark's older housing demand real engineering judgement. GS Renovation has spent over 30 years forming new openings, replacing tired joists, underpinning and building supported openings across SE1, SE15, SE16 and SE21, from listed Dulwich villas near Dulwich Park to converted Bermondsey warehouses close to the South Bank.
Structural alterations across Southwark's varied stock
Southwark's building stock ranges from Georgian townhouses and Regency terraces to Victorian workers' cottages in Peckham and industrial conversions in SE16. Each behaves differently. A new opening in a solid-brick Camberwell wall needs a steel beam on padstones with careful propping, while replacing decayed joists in a Dulwich period floor means matching depths and bearings so the new timbers work with the old structure rather than against it.
Underpinning comes up where older SE22 and SE5 foundations have moved, often on the clay subsoils common across South London. We work to the engineer's scheme, excavating and concreting in sequenced bays so the building is never undermined all at once. Supported openings, whether for wider doorways or bi-folds to the garden, are formed the same disciplined way: engineer's design first, then temporary support, then the permanent steel.
Consents and sign-off for Southwark alterations
Structural alterations inside a Southwark home are governed by the Building Regulations, so Southwark Council's building control inspects the propping, the beam bearings and any underpinning at the right stages. This is separate from planning: internal steelwork does not need planning permission. Only exterior alterations within the borough's conservation areas, or any change to a listed Dulwich or Bermondsey building, require planning or listed-building consent, which we help identify early.
Where an alteration touches the party wall shared with a neighbour, cutting beam pockets or underpinning near the boundary, the Party Wall Act applies and you serve the correct notices first. In SE16 leasehold conversions we instead secure the freeholder's licence to alter and work within the building-management rules. Either way, we coordinate engineer, consents and inspections so nothing stalls mid-job.
- Underpinning and foundation strengthening in sequenced bays
- Steel goalpost and portal frames to the engineer's design
- Steel beam and RSJ installation
- Bressummer and bay window support to period frontages
- Party Wall Act 1996 notices, awards and schedules of condition
Trusted Structural Alterations in Southwark
For structural alterations in Southwark you get one accountable contractor rather than a chain of subcontractors. GS Renovation arranges the engineer's design or freeholder consent, and Southwark building control inspections, then delivers the propping, steel, joists or underpinning cleanly. Over 30 years across the borough's period and converted homes stands behind every job.
- Rated 4.9 from 31 reviews on MyBuilder
- Load paths carried properly down to foundations
- Temporary works and needling planned before demolition starts
- Fully insured, with cover in place on every site
- Free follow-up visit after completion if anything needs attention
- The engineer's calculations obtained and worked to on site