The contractor is finalising the erection of wall barriers along the bypass adjacent to Kibera.
Companies heavily invest in prefab houses for low and middle-income Kenyans.
The building will be taller than the recently completed 163-metres-high UAP Tower.
Investors are trying to recoup some returns to meet their financial obligations.
This is the second mega shopping facility to come up in Machakos after Crystal Rivers Mall.
The existing road infrastructure does not provide for bus lanes.
The mall offers a mix of local and global retail outlets including Carrefour.
Kenya, Uganda, and Rwanda will each finance the sections of the line under their territories.
Decision was made after Kenya failed to raise 15% of the project cost.
The resort comprises apartments and beach homes priced at between Sh9.95 million and Sh72 million.