With advances in technology and industrial development, there is an increase in the consumption of electrical energy. However, the rapid exhaustion of conventional fossil fuels to produce electrical energy has provoked the engineers to find sustainable means of electrical energy generation from renewable resources. Amongst all renewable resources, solar energy produces promising results. There has been a lot of research and development in the field of Solar PV systems. Hence, with recent advancements in solar technologies, the PV systems have become more efficient and cost-effective. There is a little awareness and knowledge about the implementation of Solar PV system amongst common people. The other main issue is the space required for installing solar panels for power generation. In this paper, efforts are made to create awareness and encourage people to adopt and implement solar roof-top PV system for sustainability and a better environment. This paper involves a case study on installation of roof-top solar PV system at RRR Laboratories Pvt. Ltd. Turbhe, Navi Mumbai. The paper provides a feasibility analysis in terms of both economics and design complexities using a Top-Down approach. The analysis suggests that grid integrated roof-top system is a more viable solution for city areas where available open space for the solar panels is the main constraint. If grid integrated PV systems are implemented on open rooftops in cities, it would become versatile utilization of roof-tops which otherwise would have been left unutilized. So, the study concludes that a simple grid-tied solar PV system is feasible to be implemented on any roof-top area in cities at an individual level with affordable expenses. Thus, popularizing the implementation of grid-integrated solar roof-top PV system makes productive utilization of roof-tops as well as contributes substantially towards sustainability and environment.