Green Hills is located in the center of Biyun international residential community. It was built in 2003 and there are 500 units in total in the whole complex. The units are either town house apartments or freestanding villas. The townhouse apartments are sized around 170sqm and the freestanding villas are placed in between 333sqm and 500sqm. The detached villas are designed with 4 different styles to cater different customers, they are Spanish Style, French Style, English and traditional Chinese. There are also 3 different phases in Green hills; the newest phase 3 which is called Willow Brook and is owned by the developer is very popular among the foreign communities.