“Build beautifully. Live better.”

GRAPHENE, led by Jorge Mariz, Jose Fonseca, and Hussain Premjee, specialises in bespoke residential extensions, garage conversions, and loft transformations. Trusted by homeowners, architects, and designers, we combine craftsmanship with honesty, courtesy, and a personal touch at every stage. Our business is built entirely on strong relationships, repeat clients, and recommendations. Our fully managed service ensures flawless execution and lasting relationships built on quality, integrity, and attention to detail.

OUR TEAM

  • Jorge, a former Master Technician at a top Honda dealership, brings expert diagnostic and problem-solving skills to GRAPHENE’s refurbishments. He leads a core site team—securing materials, coordinating workflows, and upholding quality—while serving as clients’ calm, hands-on contact for on-site challenges. His clear communication and reliability have built lasting client relationships across London.

  • Jose, raised in a family of builders, brings decades of UK construction experience to GRAPHENE. After moving from Portugal in the early 1990s, he developed a comprehensive knowledge of the industry by working across all areas of construction. His specialist expertise lies in audio-visual and satellite TV installations, where technical precision and attention to detail are essential. Known for integrity, quiet determination, and meticulous attention to detail, Jose delivers tailored solutions and stands as a trusted leader on every build.

  • With a background in investment banking, Hussain brings strong financial discipline to GRAPHENE, ensuring each project is well-managed from both a commercial and operational perspective. Having lived and worked across Asia, the US, and the Middle East, he brings a global design sensibility and a natural ability to connect with clients from diverse backgrounds. Hussain plays a central role in client engagement—taking time to understand individual needs, offering tailored advice, preparing detailed quotations, and overseeing project delivery. He also works closely with our site-based teams to troubleshoot and ensure quality across all stages of the build.

Entryway with a large oval mirror, black console table holding a blue ceramic table lamp, and a round beige ottoman against a white wall with checkered black and white tile flooring.

“Transforming spaces, building relationships”

HOW WE WORK

GRAPHENE delivers dependable building services through a team of seasoned professionals and trusted subcontractors, operating from our office in Rickmansworth and workshop in Watford. 
Our clients benefit from transparent, VAT-inclusive budgets and clear pricing structures, including access to trade rates with a fixed margin for material sourcing from reputable suppliers.
We manage projects from initial planning through to completion, or collaborate seamlessly with clients’ architects and designers. Challenges are met with practical, cost-effective solutions to ensure continuous progress and budget adherence.