Structural alterations, new openings and steel support in Highgate. Trusted, professional, 30+ years' hands-on experience.
GS Renovation carries out structural alterations across Highgate, in the Victorian and Edwardian terraces that fill the N6 streets between Hampstead Heath and Kentish Town. With 30+ years behind us, we form new openings, replace tired joists, underpin where foundations need it and install supported openings, all engineered, propped and signed off correctly.

Alterations in Highgate's period stock cover a wide range: cutting a new opening into a closet wing, replacing joists that have sagged or suffered damp in a rear return, or underpinning a corner where the original shallow Victorian foundations have moved. Each starts with a structural engineer specifying the fix, whether that is a beam and padstones for a new opening or a sequence of underpinning bays for the foundations.
The side returns and rear closet wings typical of these terraces are where much of this work happens, as owners open kitchens into them or repair walls that have settled over a century. We prop, work in staged sections and keep the surrounding structure stable throughout, which is essential in homes where the party walls and upper floors depend on what sits below.
A supported opening means a steel or timber lintel carrying the wall above onto padstones, with temporary props holding everything while it is formed. In N6 terraces the wall being opened is frequently a spine wall or a party wall, so the design must account for the loads it carries and, where the party wall is involved, notice is served on the neighbour under the Party Wall Act before work starts.
All of this is Building Regulations work rather than planning, so Camden Council's building control inspects the propping, the bearings and the finished structure. Planning only enters the picture if exterior changes are proposed in a conservation area or on a listed building. We manage the engineer, the building control inspections as a single coordinated job.
For structural alterations in Highgate, GS Renovation gives you one team accountable for the whole job. We commission the engineer, serve any arrange Camden building control sign-off and carry out the propping and works cleanly in an occupied home. Underpinning, new openings, replacement joists or supported openings, all delivered with the care 30+ years in N6 brings.
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
What can I say!!! George is an extremely lovely man his workmanship is second to none, he has an excellent eye for detail and nothing was to much…
FAQ
Scope, programme and price, on one document. For a Highgate property the structural alterations quotation sets out what is being done, in what order, and what each element costs, including the Camden Council building control fee. Exclusions are stated plainly rather than left to be discovered at N6. Homeowners across Camden get the same format from GS Renovation. Ring 07472 424 226 or email info@gsrenovationltd.co.uk and we will arrange a free survey at the N6 property. 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.
Ring 07472 424 226 and we will tell you honestly rather than promise a date we cannot hold. Typically structural alterations are booked a few weeks ahead for Highgate homes, and the free survey at N6 is what gets you into the schedule. Where Camden Council approval is required we submit while you decide. GS Renovation does not take deposits to reserve Camden slots. The Highgate start date is confirmed in writing once the Camden scope is agreed.
Because it is inspected and certified, not simply declared finished. Camden Council inspects the structural stages of structural alterations at your N6 property before anything is concealed, and the completion certificate is handed to you at the end. GS Renovation also appoints the structural engineer where the design requires one. That paperwork is what a buyer's solicitor asks for when a Highgate home is sold anywhere in Camden. The Camden certificate arrives with the N6 handover pack.
The structural engineer. GS Renovation is a contractor: we appoint and coordinate the engineer, arrange the temporary works, and build to their design at your Highgate address. We do not produce calculations ourselves, and any builder claiming to is worth questioning.
More opening up than a modern house requires. Before structural alterations proceeds at an N6 property, GS Renovation confirms what is actually carrying load, because two and three-bedroom Victorian terraces, a good many now split into flats rarely match their drawings. Services and drainage are checked at the same time. The Highgate quotation then reflects what is there rather than what was assumed in Camden. Ask on 07472 424 226 what structural alterations normally involves opening up at an N6 address in Highgate before anything else.
Internal structural work such as new openings, replacement joists or underpinning is covered by the Building Regulations and inspected by Camden building control, not by planning. Planning permission only comes into it if you alter the exterior within a conservation area or the property is listed. We confirm which applies to your N6 home and handle the correct approvals throughout.
Both are covered, and often in the same week. GS Renovation is usually on more than one Camden site at a time, which is why structural alterations in Camden Town or Highgate can normally be surveyed quickly. There is no travel surcharge between them. Email info@gsrenovationltd.co.uk with the N6 postcode and we will book a visit. Quotes are free and carry no obligation. Aftercare reaches both addresses from the same team across Camden.
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 Highgate. Explore what else we do locally:
Same Service, Nearby Areas
We carry out structural alterations across Highgate and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for structural alterations in Highgate. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.