Following World War II, the state began to significantly build and improve the area transportation infrastructure. As the infrastructure improved, the population started to increase. The 50s and 60s saw Marlboro starting to significantly grow. Housing developments started to replace the farm and rural nature as the community expanded. After the early 1970s, Marlboro became a growing suburb for people working in New York and in large nearby corporations. During the 1980s and early 1990s most of the new housing developments featured four- or five-bedroom houses, but later the trend shifted toward larger estate homes. The building effort became so advanced that Marlboro Township placed restrictions for building around wetlands; called the Stream Corridor Preservation Restrictions to mitigate construction and habitat contamination.