From new openings to replacement joists and underpinning, GS Renovation carries out structural alterations throughout Borough and SE1. The bay-fronted Victorian and Edwardian terraces here, with their rear closet wings and side returns, often need careful strengthening, and our 30+ years of structural work across Southwark means every alteration is engineered, propped and certified properly.
Structural alterations across Borough's period stock
The housing near Borough Market and along the streets running back towards Bermondsey and Camberwell was built well over a century ago, and the demands we place on it have changed. Homeowners want wider openings into the side return, a supported opening between kitchen and dining space, or replacement joists where original timbers have sagged or suffered decay. Each of these is a structural alteration that starts with an engineer's design, not a builder's guess.
Underpinning is another job we handle in this part of SE1, where London clay and mature street trees can leave older terrace foundations moving. Whether it is a supported opening formed with a beam on padstones, new joists sized to span the closet wing, or foundations strengthened in stages, we prop safely, work to the engineer's specification and stage the demolition so loads are never left unsupported.
Getting SE1 alterations signed off
Any new opening cut through a wall shared with the neighbouring house triggers the Party Wall Act, so we serve notice before forming it. Where a beam bears into that party wall on a padstone, or where underpinning affects the shared foundation, the neighbour is notified and the agreement is in place before work begins. It keeps the job clean and protects you if questions ever arise later.
Internal structural alterations are controlled under the Building Regulations, so Southwark Council's building control, not the planning department, is who inspects and signs off. Planning only comes into play for exterior changes in a conservation area or to a listed building. We keep the engineer's calculations, book the building control inspections at each stage and provide the completion certificate once your alteration passes.
- Underpinning and foundation strengthening
- Floor structure, joists and beam replacement
- New door and window openings in solid walls
- Structural surveys and engineer coordination
- Temporary works, propping and needling
Why Choose GS Renovation in Borough
GS Renovation gives Borough homeowners a single team for structural alterations in SE1: engineer-designed beams, joists and underpinning, party wall notices served on neighbours, and Southwark building control managed to sign-off. We prop safely, demolish in stages and keep an occupied terrace clean. Thirty-plus years across South London means the alteration is done once and certified correctly.
- Free, no-obligation quotations
- Over 30 years of experience
- Dedicated project management
- Fully insured and guaranteed work
- Building control and planning support
- Clean, tidy and reliable tradespeople