Isleworth's TW7 terraces, with their long rear gardens, side returns and closet wings, are ideal candidates for extending. GS Renovation designs and builds single and double storey, rear, side-return and wrap-around extensions across the neighbourhood, bringing over 30 years of building experience in Hounslow borough. We manage foundations, steelwork, roofing, party wall matters and the full fit-out.
Side-return extensions on Isleworth terraces
The side return, that narrow strip of land beside the rear closet wing, is often wasted on Isleworth terraces. Filling it in widens a cramped galley kitchen into a bright open-plan space, usually combined with removing the wall to the closet wing on a steel beam. We dig new foundations to the required depth, tie the new structure to the existing brickwork, and open the roof up with rooflights for extra daylight.
Many single storey rear and side-return extensions fall under permitted development, but this is not guaranteed. If your Isleworth home sits within a conservation area, is a flat, or has already been extended, you may need a full planning application to Hounslow Council. We assess your property first, advise on the likely route, and handle the drawings and submissions, whether that means a lawful development certificate or a householder planning application.
Double storey extensions in Isleworth TW7
Where the plot allows, a double storey rear extension adds a larger kitchen-diner below and an extra bedroom or en-suite above, making real use of Isleworth's generous garden depths. These schemes are more likely to need full planning permission from Hounslow Council, and we factor that into the timeline from the outset. Deeper foundations, heavier steelwork and careful tying into the existing roof and party wall all demand experienced hands.
Because these extensions build up against or across the boundary shared with the adjoining terrace, the Party Wall Act nearly always applies, and you serve notices early to avoid delays. Building regulations govern the structure, insulation, fire safety and drainage regardless of the planning route. We coordinate the engineer, the party wall surveyor if needed and building control, then complete the full fit-out so you move straight into a finished, warm and watertight space.
- Insulation, airtightness and thermal detailing to regulations
- Scaffolding, site set-up and safe access on tight London plots
- Planning applications and permitted development assessments
- Roof works and structural alterations at roof level
- Side-return and rear extensions
The GS Renovation Difference in Isleworth
With Osterley Park and Syon Park on the doorstep, Isleworth homeowners want extensions that respect the character of their period homes. GS Renovation handles design, planning submissions to Hounslow Council, structure and finish as one accountable job. Over 30 years in TW7 means we know which schemes gain permitted development rights and which need planning, so there are no costly surprises.
- Weathertight shell reached before the fit-out begins
- Building control inspected at foundation, damp course and steel stages
- Clean, tidy and reliable tradespeople
- Neighbours given notice before the noisy stages
- A dedicated project manager from first survey to handover
- Paperwork and certificates handed over for when you sell