In the modern-day housing societies in the Twin Cities, Gulberg Islamabad is the earliest housing society to get its legal status from CDA. It is completely legal as it has gotten its NOC from CDA back in 2009 under license no. CDA/PLW-HS (127)/2009/257. It is one of the main reasons for fast-paced development in this housing society as the work was done under complete legal status.