Regent’s Playhouse is a competition proposal for a floating pavilion on Regent’s Canal in East London. Conceived as a stage, the pavilion hosts a range of activities while establishing a visual and social connection across the water. The design explores how a large, open space can be achieved with minimal and lightweight means. A suspended tarpaulin forms the primary architectural element, held in tension between two structural frames positioned at the edges of floating pontoons. The frames differ in height, allowing the membrane to be lifted and shaped through a system of cables, creating a spatial enclosure defined by tension rather than mass. Through this approach, the pavilion operates as both infrastructure and event space, offering a flexible platform for performances, gatherings, and informal use, while activating the canal as a shared public setting.