Generally, green spaces play an irreducible role in the sustainability of urban areas. Such roles include social, economic, cultural and environmental aspects. Thus, preserving urban green spaces has stimulated diverse positions in both researches and international debates overtime. In spite of the abundance of positions however, preserving green spaces in growing cities of developing countries with changing urbanization conditions has not been given comparative attention. Against this background, this paper makes a case of the Federal Capital City (FCC) of Nigeria as a typical city in its development phase in a developing countries with surging urbanization condition. In this case, over the last few years, there has been an alarming disappearance of designated green spaces in the city, against what was planned for in the Master Plan in 1979. In spite of the enactment of land use policies, there is nevertheless a consistent disappearance of green spaces in this city. As a point of departure therefore, this research argues that there is an urgent need for scientific study which investigates and document the status quo of green space in the city using the Master Plan as a reference point. To achieve this aim, gathering and interpretation of data which lead to the arguments and descriptions are presented methodologically based on a triangulated research approach. Conclusively, this paper posit that demonstrating the impacts of rapid spatial development on green spaces in developing cities such as the FCC, Abuja can be a cautionary case for the future of cities in developing countries.