Structural Alterations Barnet

From new openings to replacement joists and underpinning, GS Renovation carries out structural alterations across Barnet's interwar housing, from the semis of Edgware and Golders Green to the larger homes near Hadley Common. With 30+ years working in EN4, EN5, N2 and NW11, We build supported openings to the engineer's design that meet the Building Regulations.

Supported openings and joists in Barnet homes

Interwar Barnet houses were built with timber floor joists spanning between the external and spine walls, and after decades of altered layouts and past extensions those joists are not always where you would expect. When we form a new opening or widen an existing one, the engineer checks the floor above, specifies any replacement or doubled-up joists, and sizes the beam that will carry the wall and floor loads across the new span.

Every supported opening follows the same discipline: temporary props take the load, the masonry is removed in stages, and a steel beam is set onto padstones at each end before the props come out. Whether it is a wider doorway between two reception rooms in a Finchley semi or a structural opening for a rear extension in NW7, the bearings are designed to spread the load safely into the walls that remain.

Underpinning and building control in Barnet

Some Barnet homes on the borough's heavier clay soils show movement at the corners, and where an engineer confirms inadequate foundations we underpin in sequenced bays, excavating and filling one short section at a time so the wall is never left unsupported. This is structural work notifiable under the Building Regulations, and Barnet Council's building control inspects each stage rather than any planning department signing it off.

Because internal structural alterations are a building-control matter, not a planning one, there is usually no planning application unless you are altering the exterior of a home in a conservation area such as Hampstead Garden Suburb. Where an alteration affects a party wall shared with a neighbour, the Party Wall Act applies and you serve the notices first. We coordinate the engineer and the inspections in one programme.

• New door and window openings in solid masonry
• Steel beam and RSJ installation
• Building control applications and completion certification
• Temporary works, propping and needling
• Basement and cellar alterations with retaining support

Work in Barnet rarely sits on its own, so you may also want House extensions in Barnet, everything we do in Barnet, builders in Barnet and subsidence in london.

Why Barnet Homeowners Choose GS Renovation

GS Renovation is a single accountable team for structural alterations in Barnet: the engineer designs the openings, joists or underpinning, we coordinate the work around the party wall award and Barnet Council building control, and our own trades carry out the work. Expect proper propping, correctly sized steel on padstones, tidy working in your home, and 30+ years across the borough's interwar houses.

• Founder-led team with 30+ years of hands-on experience
• Honest updates if a date or a detail has to move
• Rated 4.9 from 31 reviews on MyBuilder
• We build to the party wall award the surveyors agree, to the letter
• A dedicated project manager from first survey to handover
• Existing structure protected and monitored as the engineer requires

Written and reviewed by Abdelaaziz Saaid, founder of GS Renovation Ltd, who has spent more than 30 years on the tools and on site in London homes. Structural design is specified by the consulting engineer appointed to your project.