Our Design & Build service offers a complete, fully managed solution for homeowners looking to extend, renovate, or build a new home. By bringing together architectural design, planning, project management, and construction under one roof, we provide a streamlined process that saves time, reduces complexity, and ensures complete accountability from start to finish.
From the initial consultation and concept design through to planning approval, technical drawings, and construction, our experienced team manages every stage of the project. This integrated approach allows for better coordination, clearer communication, and greater cost control, ensuring that design aspirations are aligned with construction requirements from the outset.
We work closely with our clients to understand their vision, lifestyle, and budget, developing bespoke solutions that maximise space, enhance functionality, and add long-term value to their property. Throughout the project, a dedicated team oversees progress, quality, and scheduling, ensuring a smooth and efficient delivery with minimal disruption.
Whether you’re planning a house extension, basement conversion, full refurbishment, or bespoke new-build home, our Design & Build service provides a single point of responsibility, giving you confidence that your project will be delivered to the highest standards of quality, craftsmanship, and professionalism.
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.




