The city has experienced rapid urbanization with an increasing population. Many informal settlements have been built. Since the late 2000s, numerous modern housing complexes have been built, many of which are gated and secured, to serve a growing Afghan middle class. Some of these include the Aria City (in District 10) and Golden City (District 8). Some complexes have been built out-of-town, such as the Omid-e-Sabz township (District 13), Qasaba/Khwaja Rawash township (District 15), and Sayed Jamaludin township (District 12).