Kigali City Tower 2005. The building consists of three components: the tower, which rises to 20 stories, the 4-story commercial center, and a car parking block which is also 4 stories tall. As of 2013 the tower is the tallest building in Kigali and Rwanda. The total retail floor space is around while office space is . The tower block is occupied mostly by office space, with only the ground, lower ground and top floors being retail. Each floor of the tower has of office space available. The largest retailer in the complex is a branch of the Kenyan supermarket chain Nakumatt, which
Kigali three administrative districts—Nyarugenge, which lies in the south west, Kicukiro in the south east, and Gasabo, which occupies the northern half of the city's territory. Kigali lies in a region of rolling hills, with a series of valleys and ridges joined by steep slopes. Kigali lies between the two mountains of Mount Kigali and Mount Jali, both of which have altitudes over , while the lowest areas of the city have an altitude of . Geologically, the city lies in a granitic and metasedimentary region, with lateritic soils on the hills and alluvial soils in the valleys. The Nyabarongo River,