Structural alterations, new openings and steel support in Deptford. Trusted, professional, 30+ years' hands-on experience.
GS Renovation carries out structural alterations throughout Deptford, from new openings in Georgian spine walls to replacement joists and underpinning in the older SE8 stock. With more than 30 years of building experience across the Lewisham area, we plan every alteration around an engineer's design and get it signed off correctly.

The Georgian and Regency townhouses around Deptford present a full range of structural work: forming supported openings between reception rooms, replacing tired or overloaded joists, and creating new doorways through solid brick. Many of these SE8 properties are listed or in a conservation area, so we begin with a structural engineer's assessment and, where the exterior is touched, check what consent Lewisham Council requires.
New openings are formed with a correctly sized beam bearing onto padstones, propped temporarily while the masonry above is removed in stages. Where original joists have sagged or been notched over the decades, we design replacements to modern spans. Underpinning, where settlement or a basement dig demands it, is carried out in engineered bays to keep the building stable throughout.
Every structural alteration we make in Deptford starts with calculations. The engineer specifies the steel sections, padstone sizes and any underpinning sequence, and that design becomes the basis for the works. This matters in tall, closely built SE8 terraces where a change on one floor affects the loads carried right down to the foundations.
Structural alterations are notifiable under the Building Regulations, so Lewisham building control inspects the propping, the bearings and the finished work before sign-off. Where an opening, beam or underpinning affects the shared party wall with the adjoining Deptford house, the Party Wall Act applies and notice is served on the neighbour. We manage the engineer and every inspection.
Deptford clients choose GS Renovation because structural alterations demand one team that owns the whole process. We coordinate the engineer's calculations, serve any handle Lewisham building control, and prop and stage the work safely in occupied period homes. More than 30 years across SE8 means the detailing is right and the sign-off is clean.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
George was a great find. The job required re-plastering the walls before fitting acrylic panels. He also re-plumbed the shower waste under the solid…
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
FAQ
We would rather not, because a phone figure is a figure that changes. What structural alterations cost at an SE8 address depends on structure and condition we can only see on site, particularly in Georgian and early Victorian housing. GS Renovation will happily talk through the likely scope on 07472 424 226, then survey the Deptford property free of charge. The written quotation follows that visit. Nothing is owed for the SE8 visit, in Lewisham or anywhere beyond it. As a rough guide, structural alterations in London ranges from roughly £1,500 for a simple opening to £15,000 or more where underpinning or major works are involved (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
That is how we work, and it is deliberate. Splitting a crew across Deptford jobs makes every one of them late, so structural alterations at an SE8 address is resourced properly from the first day to the certificate from Lewisham Council. GS Renovation would rather start you two weeks later than leave a house open. Ask our Lewisham references about it. Ring 07472 424 226 and we will confirm what else is running in Deptford or Catford.
Size, mostly. We are small enough that you know who is coming to your SE8 home for structural alterations, and large enough to run the whole Deptford project without bringing in strangers halfway through. GS Renovation keeps one named manager on the Lewisham site throughout. The 31 MyBuilder reviews behind our 4.9 rating describe exactly that. Email info@gsrenovationltd.co.uk and we will arrange a free survey. The Deptford reviews and Lewisham references are all public.
Yes. New openings, steel beams, replacement joists and underpinning are all notifiable, must be designed by a structural engineer and signed off by Lewisham Council. Planning permission is only engaged where the work affects the exterior or a listed building. GS Renovation handles the approvals for your SE8 property.
Mostly by removing the guesswork a modern house allows. GS Renovation cannot assume how a Georgian and early Victorian SE8 property is built, so structural alterations starts with confirming it and the quotation follows from there. That is slower at the start and far more reliable afterwards. Homeowners right across Deptford and Lewisham get exactly the same approach. Ask on 07472 424 226 what structural alterations at an SE8 property in Deptford has to establish before any design work.
Often, yes. Deptford's terraces share a party wall with the house next door, and if the new beam bears into that wall or the opening affects it, the Party Wall Act applies and notice must be served. The work is also notifiable to Lewisham building control. We prepare the notices and arrange inspections as part of the job.
Yes, the whole of Deptford and the SE8 area, and the surrounding parts of Lewisham too. Structural alterations are core work for us rather than an outlying service, so the team is rarely far from an SE8 address. GS Renovation will confirm your street before you spend time on drawings. Ring 07472 424 226 and you will get a straight answer the same day. The survey that follows costs a Deptford homeowner nothing. Aftercare in Lewisham is equally routine.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Deptford. Explore what else we do locally:
Same Service, Nearby Areas
We carry out structural alterations across Deptford and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for structural alterations in Deptford. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.