Property developers are responsible for identifying opportunities to develop new or existing properties, and then overseeing the building process and sale or rental of the new or improved building

a person whose job involves buying, improving, and selling buildings and land, and arranging for new buildings to be built: Commercial property developers can afford to bid higher for land because their activities yield better profits.

Property developers are the people who oversee and coordinate all of the tasks and contractors required to complete the property development.