The rising sea levels and scarcity of available land for construction in rapidly growing coastal cities have led to the necessity of expanding towards water, in a process known as land reclamation. The SEAform project is designed to address these challenges by creating self-sufficient communities integrated with the marine environment, using interconnected modular floating platforms. The aim of this thesis is to assess the environmental impacts of the floating platforms within the marine ecosystems and to demonstrate the sustainability of this solution by comparing it with dredging, the most commonly used technique in land reclamation projects. Through a comprehensive literature review, the thesis examines both documented and anticipated impacts of similar projects.