GS Renovation designs and builds extensions across Mitcham, working with the generous plots that come with 1930s semi-detached and interwar suburban houses in CR4. With over 30 years in the Merton area, we take a rear, side or wrap-around extension from foundations and steelwork right through to a finished, fitted room.
Rear and side extensions on Mitcham plots
The wide side accesses and long back gardens on many Mitcham interwar houses suit side-return, single-storey rear and wrap-around extensions particularly well. We begin with proper groundworks, digging and pouring foundations to suit the local ground and any nearby trees, then build the walls and set the steel beams that carry the new openings between old house and new space. The result is the open kitchen-diner that period layouts never had.
Double-storey extensions add a bedroom or a larger family bathroom above the new ground floor, and on the semis around Mitcham Common there is often room to do this without crowding the plot. We handle roof works, weathering into the existing pitched roof, insulation to current standards, and the full internal fit-out, so you deal with one team from the first spade to the final coat of paint.
Planning and party walls in Mitcham CR4
Whether your Mitcham extension is permitted development or needs a full planning application depends on the property, its size and what has been added before. Many single-storey rear extensions on interwar semis fall under permitted development, but larger, double-storey or wrap-around schemes, and anything on a property with existing changes, may need permission from Merton Council. We assess your house honestly and tell you which route applies before you commit.
Because Mitcham is full of semi-detached and terraced homes, most extensions involve building up to or near the boundary and cutting into a shared party wall, so party wall notices usually apply. Separately, the structural and building fabric work is signed off under building regulations by building control. We manage the drawings, the notices and the inspections so the two processes run in parallel rather than tripping each other up.
- Roof works and structural alterations at roof level
- First fix and second fix plumbing and electrics throughout
- Party Wall Act notices for excavation near a neighbour's wall
- Brickwork and mortar matched to the existing elevation
- Side-return and rear extensions
Why Choose GS Renovation in Mitcham
Homeowners in CR4 choose GS Renovation because we build extensions that respect the interwar house they join onto, and we are straight about whether you need planning permission or can proceed under permitted development. One accountable team covers foundations, steel, roof and fit-out, with the party wall notices and building control sign-off handled in-house across 30+ years in Merton.
- Our own trades on site rather than a chain of subcontractors
- Building control inspected at foundation, damp course and steel stages
- Paperwork and certificates handed over for when you sell
- Foundation depth set after trial holes, drains and trees are checked
- Honest updates if a date or a detail has to move
- Waste cleared as we go, not left piled in the garden