House Extension & Expansion Specialists London

Adding a bespoke house extension is one of the most effective ways to significantly increase the living space and overall market value of your property. Home Renovation Services London provides comprehensive, turn-key house extension services in London, taking your project seamlessly from the initial feasibility study and architectural drawing phase through to final structural calculations, excavation, steel installation, and high-end fit-out. Whether you want to expand a kitchen to create a contemporary open-plan dining space or add multiple rooms to accommodate a growing family, our expert building team ensures that every stage of your extension is delivered to the highest standards of safety, quality, and craftsmanship.

From a simple single-storey house extension to complex side returns, double-storey additions, or wrap-around designs, we customize every project to complement your existing property's architectural style and layout requirements. We work closely with structural engineers, local authority building control departments, and planning officers to guarantee full compliance with Permitted Development guidelines or coordinate necessary planning permission applications.

What Our House Extension Covers

• Bespoke architectural design, planning consultation, and space optimization
• Structural engineering calculations, steel RSJ specifications, and foundation design
• Excavation, drainage redirection, and pouring of high-strength concrete foundations
• External bricklaying, blockwork, cavity wall insulation, and brick matching
• Flat or pitched roof construction, including leadwork, tiling, and waterproofing
• Installation of premium bi-fold doors, sliding glass panels, and sky lanterns
• High-performance thermal floor insulation, screeding, and underfloor heating
• First-fix electrical installations, smart lighting layouts, and power distribution
• First-fix plumbing, radiator positioning, and waste drainage integration
• Internal wall removal, structural steel beam insertion, and space knock-throughs
• Plasterboarding, professional plaster skimming, and dry lining preparation
• Flawless interior painting, floor tiling, wood flooring, and bespoke joinery

A typical house extension project may involve a carefully planned sequence of structural works, which begins with establishing secure site fencing and erecting external scaffolding where necessary. In many instances, the process starts with ground excavation and pouring concrete foundations to support the load of the new building structure. Following the curing of the footings, our contractors typically proceed with building the masonry brickwork, match-matching existing brick colors, and installing structural steel RSJ beams to prepare for open-plan knock-throughs.

Once the external roof structure, weatherproofing, and window installations are completed, the focus typically shifts to internal rough-in stages. This often includes routing first-fix mechanical, electrical, and plumbing services, followed by installing insulation and plasterboard. After the walls are skimmed, floor screeding is typically prepared, allowing for the subsequent installation of tiling, flooring, and second-fix sanitary or lighting fixtures. Decorative painting, custom joinery, and a final deep clean are usually completed before building control inspects the site and issues the completion certificate.

Our House Extension Process

Frequently asked questions