Heartland Properties, the property development division of AECI Limited, appointed Urban Dynamics for the town planning of Longlake Estate. This project was previously known as Isidleke Estates and is situated to the east of Linbro Business Park and the Marlboro off ramp on the N3 freeway. The project represents a substantial extension to the Modderfontein development node and its implementation follows some of the most successful light industrial, office, wharehousing and distribution projects in Gauteng such as Longmeadow Business Park and Greenstone Hill. The City of Joburg approved the 'superblock' township in October 2010.  Approval of the first phase of this project, Longlake Extension 1 was received in May 2011.  This first phase, Longlake Extension 1 represents the eastward expansion of the light industrial, warehousing and distribution uses of Linbro Business Park. Further extensions are currently under consideration by Council.