GS Renovation carries out structural alterations across Eltham, working on the 1930s and interwar houses that make up so much of SE9. Whether it is a new opening, replacement joists, a supported opening onto a rear extension or localised underpinning, our 30-plus years in the Royal Borough of Greenwich mean the work is engineered, propped and signed off properly.
Structural alterations for interwar Eltham homes
The generous plots typical of Eltham mean owners often extend at the rear or reconfigure the ground floor, and both create structural work. Forming a supported opening between the existing house and a new kitchen extension needs a correctly sized steel beam on padstones; replacing tired or undersized floor joists in a 1930s semi needs the new spans checked. We start with an engineer's design for every alteration.
Underpinning comes up on some Eltham properties where an extension foundation must tie into the original, or where seasonal movement in the local clay subsoil has affected a corner. It is carried out in short, controlled bays so the house is never undermined all at once. Whatever the alteration, we prop first, work in a safe sequence and keep the structure supported throughout.
Engineered and certified across the Royal Borough
Every structural alteration we make in SE9 is designed to engineer's calculations and inspected by building control under the Building Regulations. That covers new openings, beam and padstone details, joist replacements and any underpinning, with the Royal Borough of Greenwich or an approved inspector checking the critical stages before the work is closed up and finally certified.
Where an alteration touches the party wall shared with an attached Eltham neighbour, for instance cutting a beam bearing into it or working near the shared foundation, the Party Wall Act applies and you serve notice before starting. We coordinate the engineer, the propping and the building control inspections so you deal with one team from first drawing to final sign-off.
- Reinstatement, plastering and finishing after structural works
- Lintel replacement and repair over failed openings
- Temporary works, propping and needling
- Basement and cellar alterations with retaining support
- New door and window openings in solid masonry
Trusted Structural Alterations in Eltham
For structural alterations in Eltham, homeowners rely on GS Renovation to keep everything under one roof: engineer-designed openings and underpinning served, building control inspections managed and safe staged working that never leaves the house unsupported. Clean, considerate work in occupied SE9 homes and a certified result, drawing on more than 30 years across the Royal Borough of Greenwich.
- Existing structure protected and monitored as the engineer requires
- Temporary works and needling planned before demolition starts
- Building control applications and inspections coordinated for you
- A dedicated project manager from first survey to handover
- Rated 4.9 from 31 reviews on MyBuilder
- Materials priced at options, so you choose the finish