GS Renovation designs and builds extensions across Harrow, working with the generous plots that the borough's 1930s semis and interwar suburban houses were built on. With over 30 years in HA1, HA2, HA3, HA5 and HA7, we handle groundworks, steelwork, roofing and fit-out as a single project from Pinner to Stanmore.
Rear and side-return extensions in Harrow
The wide plots typical of Harrow's interwar streets suit rear and wrap-around extensions particularly well, and the side access on many semis in HA2 and HA5 makes a side-return infill straightforward. We begin with proper foundations and groundworks sized to the ground conditions, then install the steel beams needed to open the new space into the existing house, all designed by an engineer and signed off by building control.
A single or double storey rear extension transforms how these houses live, turning a compartmented 1930s layout into an open kitchen-diner that faces the garden. We manage the roof works, whether a flat roof with lantern or a pitched tie-in to the existing roofline, and complete the full fit-out, so the new room is decorated, wired and plumbed rather than left as a shell.
Planning and permitted development in Harrow
Whether your project is permitted development or needs a full planning application depends on the property and the design, and we set this out honestly at the start. Many single storey rear extensions in Harrow proceed under permitted development, but larger schemes, double storey work, and anything near Harrow on the Hill or in a conservation area will usually need permission from Harrow Council before building regulations even come into play.
We help you understand which route applies, prepare for the council submission where one is required, and coordinate the party wall notices that almost always follow because your neighbour shares a boundary. Building control then inspects the foundations, steelwork, drainage and insulation as the work proceeds. Handling planning, party wall and building regs together keeps an HA3 or HA7 extension moving without avoidable delays.
- Planning applications and permitted development assessments
- Scaffolding, site set-up and safe access on tight London plots
- Bi-fold, sliding and French door openings to the garden
- First fix and second fix plumbing and electrics throughout
- Party Wall Act notices for excavation near a neighbour's wall
Why Choose GS Renovation in Harrow
Harrow homeowners choose GS Renovation because we build the whole extension, not just the shell. From foundations and steel to roofing and finish, one accountable team manages the council route and building control on your interwar plot. Over 30 years across HA1 to HA7 means tidy working in an occupied family home and a result that adds real space.
- Neighbours given notice before the noisy stages
- Scaffolding and site set-up planned for tight London plots
- Registered in England, Companies House no. 14611254
- Building control inspected at foundation, damp course and steel stages
- Party Wall notices served for excavation near a neighbour's wall
- Aftercare and snagging support once the job is finished