GS Renovation designs and builds extensions on Stanmore's interwar houses, the substantial detached and semi-detached homes that sit on the generous plots typical of HA7. Over more than 30 years across Harrow and North West London, we have taken projects from foundations through steelwork to a finished, fitted-out space that suits the character of the area.
Rear and side-return extensions in Stanmore
The wide plots around Stanmore lend themselves to rear and side-return extensions, and often a wrap-around that combines both to create a large open living and dining space. Because 1930s houses were built with a defined internal layout, opening up the rear usually means a steel beam sized by a structural engineer and signed off by building control. We handle the foundations and groundworks first, then the superstructure, the roof and the glazing that brings light deep into the plan.
Double storey extensions are also common on Stanmore's larger semis and detached homes, adding a bedroom or en-suite above the new ground floor room. We match brickwork and rooflines to the existing house so the addition reads as part of the original rather than a bolt-on. Every extension is built to current building regulations, with insulation, drainage and structural details all inspected and approved as the work progresses.
Planning and permitted development in HA7
Not every extension needs a full planning application. Many single storey rear extensions on Stanmore houses fall under permitted development, provided they stay within the limits on depth, height and materials. Others, particularly larger, double storey or wrap-around schemes, do need planning permission from Harrow Council. We assess your specific property and tell you which route applies before you commit, so there are no surprises once the design is agreed.
Permitted development still requires building regulations approval, and the two things are separate. We prepare the drawings, submit to Harrow Council where planning is needed and manage the building control inspections throughout. Where the extension sits close to or on the party wall shared with a neighbouring Stanmore home, we also serve the necessary party wall notices. One team carries the project from first sketch to the final decorated, fitted-out room.
- Architectural drawings and structural engineer coordination
- Building control inspections at foundation, damp course and steel stages
- Scaffolding, site set-up and safe access on tight London plots
- Trial holes to set foundation depth near drains and trees
- First fix and second fix plumbing and electrics throughout
Trusted House Extensions in Stanmore
Stanmore homeowners choose GS Renovation because we manage the whole extension under one roof, from the engineer's steel to the plaster finish. We tell you honestly whether your scheme is permitted development or needs a Harrow Council application, handle party wall matters and keep every stage within building regulations. With 30+ years in HA7, we build additions that last.
- Weathertight shell reached before the fit-out begins
- Honest updates if a date or a detail has to move
- Drainage diverted or built over with the right approval in place
- Rated 4.9 from 31 reviews on MyBuilder
- Itemised pricing, so you can see what every stage costs
- Brick and mortar matched to the existing elevation