The article deals with evolution of neighbor law beginning from the age of the ancient world and up to our times. The authors prove that already by the middle of the 19th century environmental and technological threats become greatly important in the neighborhood relations, and from the early 21st century these threats start acquiring a new systematic attribute associated with the beginning of the age of globalization. Sustainable development at the local level is greatly influenced by the dynamics of population settlement leading to emergence of giant megalopolises, where millions of people reside at the same time. This causes new types of neighborhood disputes not existing before. The post-Soviet legal science, courts and legislation are not completely ready for their resolution. Nevertheless, even now we can observe the outlines of new environmental threats to sustainable development at all its levels, caused by development of green energy, nanotechnology and the climate change. There are no simple ways to resolve neighborhood conflicts either – it is necessary to create an integrated system of containment and counterbalance, including both private and public methods. Impact of the Environmental Factor on the Dynamics of Development of Neighbor Law in the Context of Issues of Sustainable Development. Available from: https://www.researchgate.net/publication/305266535_Impact_of_the_Environmental_Factor_on_the_Dynamics_of_Development_of_Neighbor_Law_in_the_Context_of_Issues_of_Sustainable_Development [accessed Nov 22 2017].