A house extension is one of the most effective ways to create additional living space while enhancing the functionality, comfort, and value of your home. At G&J Construction Services Ltd, we specialise in designing and constructing bespoke extensions that are carefully tailored to the needs of each client and seamlessly integrated with the existing property.
Whether you are looking to create a spacious open-plan kitchen and dining area, an additional reception room, home office, utility space, or extra bedrooms, our experienced team delivers high-quality extension projects that maximise the potential of your home. We undertake rear extensions, side return extensions, wrap-around extensions, double-storey extensions, and bespoke solutions designed to suit your lifestyle and future requirements.
From the initial design and planning stages through to construction and final completion, we provide a fully managed service that ensures every aspect of the project is carefully coordinated. Our team works closely with architects, structural engineers, and local authorities to ensure compliance with planning requirements and building regulations while maintaining the highest standards of workmanship throughout the build.
Using quality materials, skilled craftsmanship, and professional project management, we create extensions that blend seamlessly with the existing architecture while delivering bright, functional, and contemporary living spaces. Through our integrated design and build approach, we provide a smooth and efficient process, giving homeowners confidence that their project will be delivered on time, within budget, and to the highest standards.
Whether extending a period property or a modern home, G&J Construction Services Ltd creates beautifully designed spaces that transform the way you live while adding lasting value to your property.
Based in North London, G&J Construction Services Ltd works with homeowners Cockfosters, Barnet, Hadley Wood, Southgate, Finchley, Muswell Hill, Highgate, Enfield, Totteridge, Winchmore Hill, Mill Hill, and the surrounding areas. We are committed to creating beautiful, functional homes that enhance everyday living while adding lasting value to our clients’ properties.
Project Stages
Every project begins with a detailed consultation to understand your vision, requirements, and budget. We carry out a site assessment and provide initial advice on feasibility, design opportunities, planning considerations, and indicative construction costs.
A comprehensive measured survey of the property is undertaken to accurately record existing conditions. Using this information, we prepare detailed existing floor plans, elevations, and site drawings that form the foundation of the design process.
We develop tailored design proposals that maximise the potential of your property while reflecting your lifestyle and aspirations. Concept drawings are accompanied by an initial construction estimate to help align the design with your budget and project objectives.
Following approval of the preferred concept, we prepare detailed architectural drawings and supporting documentation for submission to the local planning authority. We manage the planning application process and liaise with planners to help achieve a successful outcome.
Once planning approval is secured, we produce detailed technical drawings for construction. This stage includes Building Regulations drawings, structural engineer calculations, party wall matters where required, and coordination with Building Control to ensure full compliance with current regulations.
Before construction commences, we provide a detailed quotation, scope of works, and project programme outlining key milestones and anticipated completion dates. This ensures complete transparency and allows the project to progress smoothly from design into construction.
Our experienced construction team manages every aspect of the build, maintaining the highest standards of workmanship, communication, and site management. Regular progress updates ensure clients remain informed throughout the construction phase until final completion and handover.




