Rear Extension & Expansion Specialists London

Building a custom rear extension is one of the most effective structural modifications to expand your home outwards, utilizing your back garden space to create a spacious new floorplan. Home Renovation Services London delivers premium, end-to-end rear extension services in London, taking your project seamlessly from structural layout design and architectural survey drawings to foundation pouring, steel installation, and complete high-end interior finishes. Whether your goal is to introduce a bright family room, a dining zone, or a modern open-plan kitchen, our master builders ensure that the extension integrates perfectly with the existing property footprint.

Our rear extensions are customized to respect local boundary lines and optimize garden access through expansive glazed bifold doors. We handle all planning permission applications, Permitted Development prior approval requests, and structural calculations to ensure your home expansion is fully compliant and certified.

What Our Rear Extension Covers

• Architectural layout planning, boundary analysis, and garden space optimization
• Structural engineering calculations, load-bearing steel design, and RSJ positioning
• Excavation, groundwork, drainage realignment, and foundation concrete pouring
• Bricklaying, insulated cavity wall construction, and historic brick matching
• Pitched or flat roof construction including weathering, tiling, and insulation
• Erection of sky lanterns, architectural rooflights, and structural glazing
• Installation of high-performance bifold doors and large sliding glass panels
• Subfloor preparation, thick thermal insulation, and underfloor heating pipe runs
• First-fix electrical runs for integrated LED lighting, power points, and media walls
• First-fix plumbing for heating extensions, utility services, and outdoor taps
• Plasterboard dry lining, wall framing, and professional plaster skim coating
• Flawless interior painting, floor tiling, timber flooring, and custom cabinetry

A bespoke rear extension project typically follows a structured timeline of works, which begins with site preparation, boundary protection, and excavation of the garden footprint. Because these projects project directly into the rear garden, initial works often prioritize ground reinforcement, concrete pouring, and matching external brickwork facade details to keep the appearance cohesive. Once the main cavity walls are built, our contractors typically position heavy-duty structural steel RSJ beams to prepare for internal knock-throughs.

After the main extension shell is weatherproofed with roof coverings and bifold doors are installed, work typically shifts to the internal rough-in phases. This often includes running first-fix mechanical, electrical, and plumbing circuits, followed by installing floor insulation and plasterboards. Once the surfaces are skimmed with plaster, liquid screeding is typically poured, allowing for the subsequent fitting of tiles or wood flooring. Second-fix connections, custom decorating, and a deep clean are usually completed before the final building control inspector signs off.

Our Rear Extension Process

Frequently asked questions