The luxury 517-metre skyscraper is scheduled to open in 2028.
The houses will be located within the Tilisi mix-use development site.
The megacity is now expected to span just 2.4 kilometres by 2030.
The 125-meter-high tower is one of the tallest buildings in Kenya.
GulfCap Real Estate is using tunnel formwork to expedite projects.
The project stalled due to a court challenge by neighbouring residents.
Companies are shelving their plans to take additional office spaces.
IHS has acquired the units at 237 Garden City on Thika Road, Nairobi.
World Trade Centre Hospital will be located within the Nairobi Business Park.
Phase one of Buxton Point estate in Mombasa, comprises 584 units.