GS Renovation designs and builds extensions across Finchley, where 1930s semi-detached and interwar houses sit on generous suburban plots with room to grow. With more than 30 years of building experience in N3 and across Barnet, we handle the groundworks, the steel, the roof and the full fit-out as one accountable project.
Rear and side-return extensions in Finchley
The wide plots typical of Finchley suit generous single storey rear extensions and side infills that fill in the gap alongside the original 1930s footprint. We start with foundations and groundworks suited to the local ground, then bring in steel beams where the back wall is removed to join the extension to the existing house. A well-planned rear extension turns the cramped original kitchen into an open-plan kitchen-diner opening onto the garden.
Double storey and wrap-around extensions are also popular on the larger interwar homes near Hampstead Garden Suburb and towards Mill Hill, adding a bedroom and en-suite above a widened kitchen. We match brickwork and roof pitch to the existing house so the addition reads as part of the original build, and we handle the roof works, windows, insulation and full internal fit-out through to decoration.
Planning and party walls in N3
Some Finchley extensions fall under permitted development, while others need a full planning application to Barnet Council. It depends on the size, the height, how close you build to the boundary and whether your street or property carries any restrictions. Homes within or near the Hampstead Garden Suburb conservation area face tighter controls. We assess your specific property early and tell you honestly which route applies before any design is finalised.
Whichever route you take, the structural work still needs building regulations approval and inspection, which is separate from planning. Because these are semi-detached and closely spaced houses, excavating foundations near the boundary or building onto the shared wall brings the Party Wall Act into play, so notices go to neighbours in good time. We coordinate planning, building control and party wall matters so nothing stalls the programme.
- Building control inspections at foundation, damp course and steel stages
- Single and double storey extensions
- Steel goalpost frames where the rear wall opens up
- Trial holes to set foundation depth near drains and trees
- Side-return and rear extensions
Why Choose GS Renovation in Finchley
Finchley homeowners choose GS Renovation because we manage the whole extension, from foundations and steel to the roof and the final coat of paint, with one team answerable for the result. We advise clearly on permitted development versus a Barnet Council planning application, handle party wall notices on your semi, and bring 30+ years of local building to every stage.
- Materials priced at options, so you choose the finish
- Waste cleared as we go, not left piled in the garden
- Weathertight shell reached before the fit-out begins
- Building control inspected at foundation, damp course and steel stages
- Honest updates if a date or a detail has to move
- Aftercare and snagging support once the job is finished