Single Storey Extension Builders London

A well-planned single storey extension is one of the best ways to add space, improve flow, and increase property value without moving. Home Renovation Services London delivers complete single storey extension services in London, creating brighter, larger ground-floor layouts for open-plan kitchen diners, family rooms, playrooms, and home offices. We manage everything from early measurements and build planning through to foundations, structural steels, roofing, glazing, and a full internal fit-out, so the new space feels like a natural part of your home.

Whether you are planning a rear extension, side return, or wrap-around layout, our single storey extension team focuses on build quality, weatherproof detailing, and a tidy finish. We coordinate key stages such as drainage, insulation, structural openings, and building control inspections, helping you achieve a safe, compliant extension that is comfortable all year round.

What Our Single Storey Extension Covers

• Rear extensions, side return extensions, and wrap-around single storey layouts
• Measured surveys and practical build planning to suit your existing ground-floor layout
• Groundworks, excavation, drainage runs, and concrete foundations
• Cavity wall construction with insulation and brick matching where required
• Structural steel installation (RSJs) for knock-throughs and open-plan openings
• Flat roofs, warm roof systems, or pitched roof builds (scope dependent)
• Roof lanterns, rooflights, and skylights to bring more daylight into the extension
• Bifold doors, sliding doors, and glazed rear elevations for garden access
• First-fix electrics and plumbing for kitchens, utility areas, and heating upgrades
• Insulation, plasterboarding, and plaster skimming for a clean internal finish
• Floor build-ups, screeding, and preparation for tiles, wood, or other finishes
• Second-fix carpentry, decorating, and final snagging before handover

A typical single storey extension build starts with setting out, site protection, and groundwork. This usually includes excavation, drainage preparation, and pouring foundations, followed by building the extension walls and forming structural openings where the existing rear wall is being opened up. We focus on keeping the site safe and organised, especially where access runs through the home.

Once the shell is up and the extension is weather-tight, we move into first-fix plumbing and electrics, insulation, plasterboarding, and plastering. The final stage is fit-out and finishing, including flooring preparation, second-fix connections, decorating, and snagging. We then complete a final walk-through so you are clear on what has been delivered and the space is ready to use.

Our Single Storey Extension Process

Frequently asked questions