The mall is set on a 4.5-acre piece of land in the Rosslyn suburb on Limuru Road.
From April 1, builders will only be allowed to use ribbed steel bars.
Light gauge steel structures save developers up to 20 per cent of the construction cost.
Kenya lacks consistent green building standards and guidelines for developers to follow.
High rise apartments have proved to be the most efficient way to maximise land use.
Developers who put up at least 400 low cost homes will pay 20pc corporate tax.
Kenya Railways plans to build office blocks and malls on 320 acres currently idle.
The project has had its share of controversy since it was commissioned in July 2013.
A feasibility study failed to support the viability of a shopping mall and apartments at the site.
Le’mac is currently the tallest residential building in Kenya.