GS Renovation carries out structural alterations throughout Forest Hill, from new openings in the closet wings of SE23 terraces to replacement joists and supported openings near Blackheath and Telegraph Hill. Over more than 30 years in South East London we have handled the awkward realities of Victorian and Edwardian homes, from tired timbers to settlement at the rear.
New openings and joists in Forest Hill homes
Structural alterations cover more than knocking through. In Forest Hill's terraces we form new openings between the rear reception and the closet wing, replace joists that have sagged or suffered decay where the wing meets the main roof valley, and install supported openings for wider doorways and garden access. Each of these changes the way loads travel through the house, so each starts with an engineer's design rather than a builder's guess.
New openings and replacement beams are sized by a structural engineer and bear onto padstones set into solid masonry. We prop above the work, cut and form the opening in controlled stages, then lower the props once the steel or timber is bedded and pinned. On these hillside SE23 streets we also check the bearing at the party wall, since it frequently carries one end of the new steel.
Underpinning and building control in SE23
The London clay under Forest Hill's hills shrinks and swells, and mature street trees add to the movement, so older terraces here sometimes show settlement cracks at the rear addition. Where an engineer confirms inadequate foundations, we underpin in short, sequenced bays so the house is never undermined all at once, casting each bay to a designed depth before moving to the next.
All of this work is notifiable under the Building Regulations, and Lewisham Council's building control inspects the excavations, reinforcement and beams before sign-off; it is building control, not planning, that governs internal structural alterations. Where an alteration or underpinning affects the wall shared with your neighbour, the Party Wall Act applies and you serve the appropriate notice before starting.
- Building control applications and completion certification
- Load-bearing wall removal and new structural openings
- Lintel replacement and repair over failed openings
- Reinstatement, plastering and finishing after structural works
- Trial holes to confirm foundation depth and ground conditions
Why Choose GS Renovation in Forest Hill
For structural alterations in Forest Hill, GS Renovation gives you a single team accountable from survey to certificate. We commission the engineer, form openings and underpin to the design, coordinate any party wall notices with neighbours, and manage Lewisham building control to sign-off. Clean, sequenced working in your occupied SE23 home is standard, backed by 30+ years of local structural experience.
- Rated 4.9 from 31 reviews on MyBuilder
- A dedicated project manager from first survey to handover
- Existing structure protected and monitored as the engineer requires
- Work sequenced around the surveyors' schedule of condition before excavation
- We build to the party wall award the surveyors agree, to the letter
- A written scope and programme agreed before work starts