This paper examines the herd behavior in sales launch decisions by developers in China’s housing market. Using a sample of 6,930 development projects from 1997 to 2009, we find that the propensity of sales launch is positively related to the number of prior sales launches within a certain distance. This effect is more pronounced when the time interval between sales dates is shorter and when the distance is shorter. Furthermore, lead projects that are developed by reputable developers have a greater influence on later developers’ decisions than non-reputable ones. These findings provide evidence of herd behavior in developers’ sales launch decisions and are in line with informational and reputational herding theories.