This thesis aims to research what urban interventions can help boat dwellers better reclaim the city in London. The thesis begins with research on the context of living afloat in the UK, including history, boaters’ motivations, boat management, etc. Then the specific site- King’s Cross will be analyzed through using the method of mapping. After this, boaters' challenges while living afloat will be explained into four aspects, namely on-boat challenge, mooring facility challenge, no sense of belonging, and imbalanced power. This project will work on these challenges, and then the corresponding strategy of the collaborative platform is proposed. This platform consists of three parts: improving the mooring facility, intervening openings, and developing the floating consumption mode. This platform's implementation is based on multi-scales urban interventions, comprising scale S intervention, scale M intervention, and scale XL intervention.