Grafted provided comprehensive architectural services and project coordination for the expansion of a client’s penthouse residence. Addressing the client’s requirement for additional family accommodation, the client appointed grafted to explore the potential of acquiring and integrating the apartment below their existing two-level penthouse. Our initial feasibility study confirmed the viability and established a clear approach for this vertical integration. grafted developed the scheme through detailed design and tender stages, having secured the necessary planning permission. Grafted continued to provide coordination and support during the construction phase, liaising with and managing the multidisciplinary consultant team (Structural, M&E, QS, CA) to support the delivery of this significant refurbishment and integration project. The project, which incorporates a new internal staircase connecting three floors, completed in October 2025.