GS Renovation carries out structural alterations across Dulwich, from forming new openings in the period villas to replacing tired joists and underpinning in the bay-fronted Victorian and Edwardian terraces of SE21. Over 30 years in Southwark means we understand how these houses are built and how to change them without weakening what holds them up.
Structural alterations for Dulwich period homes
The Victorian and Edwardian terraces around Dulwich come with their own quirks: rear closet wings, side returns and original timber joists that have carried a century and a half of use. Whether you want a wider supported opening into a side-return infill, replacement joists where old ones have sagged, or a new doorway punched through solid masonry, we start with an engineer's design so every alteration is calculated, not chanced.
New openings get a properly sized steel lintel or beam bearing onto padstones, with temporary propping while we cut and safe staged removal of the masonry above. For subsidence or a settled bay, we underpin in short, sequenced bays to extend the foundation down to firmer ground. Each of these is a distinct structural operation, and we sequence them so the house stays fully supported at every stage of the work.
Consent and sign-off across SE21
Structural alterations inside your Dulwich home are controlled under the Building Regulations rather than planning, so this internal work needs building control, not planning permission. The exception is exterior work in a conservation area or on a listed building, where separate consent applies. We tell you plainly which route your project takes so there are no surprises and no work that has to be undone later.
Where an alteration touches the party wall shared with your neighbour, common in these tightly packed SE21 terraces when beams bear into it or foundations are underpinned close by, the Party Wall Act applies and you serve the notices. Southwark Council's building control inspects the steelwork, propping and any underpinning at the key stages and issues the completion certificate once satisfied. We arrange every inspection for you.
- Trial holes to confirm foundation depth and ground conditions
- Lintel replacement and repair over failed openings
- Structural surveys and engineer coordination
- Chimney breast removal and support to the stack above
- New door and window openings in solid masonry
Trusted Structural Alterations in Dulwich
For structural alterations in Dulwich, GS Renovation gives you a single accountable team from engineer's drawings to final certificate. We install the steel to the engineer's sizing on padstones, prop and cut in safe stages, underpin sequentially where needed, and handle Southwark building control. Tidy working in your occupied home and 30+ years of Southwark experience underpin the lot.
- Straight advice on what is and is not worth spending money on
- Materials priced at options, so you choose the finish
- Building control inspected at foundation, steel and completion
- Aftercare and snagging support once the job is finished
- Every alteration certified rather than quietly built over
- We build to the party wall award the surveyors agree, to the letter