The increasing climate effects change have significantly exacerbated environmental displacement which highlights the urgent need for sustainable and well-planned resettlement strategies for environmental migrants. This study examines the concept of "planned resettlement" within the context of natural disasters and climate-related environmental challenges adopting a theoretical approach to climate-induced migration which distinguishes it from economic migration while it addresses the multifaceted social, economic, and environmental challenges displacing populations encounter. The article initially tests international legal and political frameworks which govern environmental migrants, with great attention to policy gaps and challenges. It shows the role of organisations in supporting displaced populations and facilitating their resettlement. The examination of sustainable planning models in resettlement processes is the focus of the study which draws insights from countries successfully used such initiatives, with a strong focus on achieving stability and socio-economic integration. In addition, the research examines the obstacles hindering effective resettlement- environmental, social, and economic challenges, and suggests innovative approaches to sustainability. There is an emphasis on the responsibility of governments, civil society, and international organisations in formulating policies mitigating the susceptibilities of populations which face climate-induced displacement. The work examines the necessity of proactive planning and policy development for fostering resilient communities for environmental migrants. The study recommends the nexus between climate change and migration, thus broadening understanding of sustainable resettlement as a response to contemporary environmental issues.