Garage Conversions Services.

A garage conversion is typically the most affordable way to gain additional living space. Starting from around £15,000, it converts cold, underutilised storage into a fully insulated, heated, and finished room that integrates seamlessly with the rest of your home. Grand Innovations specialises in single and double garage conversions across Surrey and London, creating everything from home offices and gyms to cinema rooms, playrooms, and self-contained annexes.

Most garage conversions fall under Permitted Development, so planning permission is rarely required. Building Regulations approval, however, is always necessary — covering structural integrity, insulation, damp-proofing, ventilation, electrics, and fire safety. We manage the full compliance process on your behalf. Our weekly billing model means you only pay for completed, verified work — no large deposits, no surprises.