GS Renovation creates open-plan spaces across Mitcham, turning the compartmented rooms of 1930s semis and interwar houses into kitchen-diners, knock-throughs and broken-plan layouts. With over 30 years in CR4 and the wider Merton area, we handle the steel, the engineering and the building control so your reconfigured home is safe and certified.
Opening up Mitcham's 1930s semis
Interwar houses in Mitcham were designed as a series of separate rooms, so the front reception and rear kitchen are divided by a solid, usually load-bearing wall. Owners on these generous plots near Morden and Wimbledon increasingly want one bright, connected living space at the back of the house. Removing or opening that spine wall is a structural job, so a structural engineer first works out what it carries and sizes the steel beam that will replace it.
The beam bears onto padstones at each end, sized for the span and the load coming down from the floor and roof above. We install temporary props, take the wall out in stages, then lift and pack the steel so it carries immediately before the props are struck. Some Mitcham owners prefer a broken-plan feel, keeping a partial pier or introducing a Crittall-style glazed divider so the kitchen-diner stays light but zoned rather than one single volume.
Knock-throughs certified by Merton building control
A knock-through in a Mitcham house is controlled under the Building Regulations, not planning, so no planning permission is required for this internal work unless you are also altering the exterior in a conservation area. Merton Council's building control inspects the propping and the finished beam, then issues the completion certificate. Where the wall being opened ties into the party wall shared with the adjoining semi, you serve the Party Wall Act notices on the neighbour before work begins.
We think about how the finished open-plan space actually works: the beam is boxed in and plastered flush so the ceiling reads as one clean line, floor levels are matched between the old rooms, and any Crittall divider or retained pier is set out neatly. From the first survey to the final certificate, one team manages the engineer, the steel and the sign-off, keeping your CR4 home tidy and liveable throughout the conversion.
- Level flooring and threshold removal across the whole space
- Making good, plastering and decorating the finished space
- Structural engineer coordination and building control sign-off
- Open-plan kitchen-diner conversions
- Rooflights and glazed roofs to bring light deep into the plan
Why Mitcham Homeowners Choose GS Renovation
For open-plan conversions in Mitcham, GS Renovation gives you one accountable team: engineer-sized steel, correctly bearing padstones where a semi is shared, and Merton building control inspections and certificate handled throughout. We prop safely, box in the beam cleanly and keep your interwar CR4 home tidy and lived-in, all backed by more than 30 years of structural experience across Merton.
- Floor levels and thresholds evened out across the whole space
- Paperwork and certificates handed over for when you sell
- Cooking smells and extraction planned into an open kitchen
- A written scope and programme agreed before work starts
- The house kept usable while the opening is formed in stages
- Waste cleared as we go, not left piled in the garden