The two world-wide challenges, the population growth and the climate change, have forced everyone to think differently and seek new approaches to revive cities to be sustainable for centuries to come. Therefore, transforming the cities to the green and smart city are inevitable. The first step towards green and smart city is the recognition of applicable indicators for an existing city. In the next stage, introducing the most sustainable strategies to implement and realize the introduced indicators are of key importance. Omid-e-Sabz is a crowded city in the south-west of Kabul, hosts more than 27,000 inhabitants. Thus, a study through modifying this city to a sustainable and smart city is crucial for future urban development in Afghanistan. The indicators of green and smart city have been analyzed for Omid-e-Sabz Town in this paper. Moreover, some key guidance’s and plans for transforming an ordinary city to sustainable and smart city have been introduced and suggested. This paper is the first of its kind that discusses this important topic for Afghanistan. It will help the urban planning sector of Afghanistan to learn and continue this discourse to make sure the future cities in Afghanistan are smart and sustainable.