Structural alterations, new openings and steel support in Romford. Trusted, professional, 30+ years' hands-on experience.
GS Renovation carries out structural alterations throughout Romford, whether that is a new opening in an interwar semi near Hornchurch Country Park or replacement joists in a generous 1930s suburban home in RM1. With 30+ years across Havering, we handle new openings, supported beams, replacement joists and underpinning to a proper engineered standard.

Romford's interwar houses sit on good plots, which makes them ideal for rear openings into extensions, wider doorways through the solid spine wall, or a supported opening between kitchen and dining room. Every one of these is a structural change to load-bearing brickwork, so we begin with a structural engineer who calculates the steel beam and the padstones needed at each bearing.
On site we prop the structure above, form the opening in staged cuts, and set the beam onto its padstones before the temporary supports come out. Because many of these 1930s homes have suspended timber ground floors, we also check the joists and wall plates as we go, replacing any that have softened over ninety years of service.
Some Romford properties near mature trees around Raphael Park sit on shrinkable London clay, and seasonal movement can leave older foundations needing underpinning. Where an engineer confirms it, we underpin in the traditional sequenced bays, working under building control inspection so the new foundations are recorded and signed off under the Building Regulations rather than treated as cosmetic patching.
Replacement joists are common in these interwar homes too, whether from historic leaks or notching by earlier trades. We fit new joists to the span, provide proper end bearings and restraint, and coordinate with Havering building control throughout. None of this needs planning permission unless the home is listed; it is building control that certifies the structural work.
For structural alterations in Romford, GS Renovation gives you a single accountable team: engineer-designed beams, joists and underpinning where the semi is shared, and Havering building control managed from application to sign-off. Thirty-plus years in Havering means we know the interwar stock, work tidily around your family, and leave every alteration properly certified.
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
Really happy with the quality of remedial works carried out by George in putting other previous tradesman work right. He was very helpful, honest and…
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
FAQ
Usually the structural work and the making good, in that order. Steel, propping and the engineer's design account for the largest share of a structural alterations job at an RM1 address, and reinstating a 1930s and interwar interior afterwards accounts for more than most people expect. The Havering Council fee is small by comparison. GS Renovation shows all three separately on the Romford quotation. Ring 07472 424 226 and we will explain the balance at an RM1 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.
Allow for the structural stage, the following trades and the making good as three separate blocks. On a structural alterations project at an RM1 address the first is usually shorter than Romford homeowners expect and the last longer, particularly in 1930s and interwar housing. GS Renovation gives you the week by week programme with the quotation. The Havering Council inspections are marked on it in advance. Email info@gsrenovationltd.co.uk and we will send a sample Havering programme before the RM1 survey.
We hand over, clear the site, and stay contactable. The structural alterations work at an RM1 address ends with a final Havering Council inspection, the certificate you will need when the Romford property is sold, and a walk round with your project manager. GS Renovation then holds the five year guarantee on installations. Ring 07472 424 226 if anything needs looking at afterwards, anywhere in Havering. Aftercare in Romford goes to the same Havering team.
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 Romford address. We do not produce calculations ourselves, and any builder claiming to is worth questioning.
Yes, extensively. GS Renovation works on that stock throughout Havering and Romford, so structural alterations at an RM1 address draws on repeated experience rather than a first attempt. Our founder has over 30 years of hands-on experience behind those judgements. Ask for references and we will give you addresses of finished work near Hornchurch. Email info@gsrenovationltd.co.uk and we will describe recent structural alterations projects of that type across Havering and in Romford itself.
Usually not. Internal structural work such as new openings, replacement joists or underpinning is controlled under the Building Regulations by Havering building control, not planning. Planning only comes in for exterior changes on listed buildings or in conservation areas. We arrange the engineer, submit the building control application and manage inspections through to the completion certificate.
Yes, the whole of Romford and the RM1 area, and the surrounding parts of Havering too. Structural alterations are core work for us rather than an outlying service, so the team is rarely far from an RM1 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 Romford homeowner nothing. Aftercare in Havering 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 Romford. Explore what else we do locally:
Same Service, Nearby Areas
We carry out structural alterations across Romford and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for structural alterations in Romford. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.