All developments, whether new or established, were once vacant fields. A developer decided to divide the land up into lots and plan streets, water lines and sewer lines to serve those lots in order to build houses and sell them for profit. The developer petitioned the City to build the improvements, and promised to pay the construction cost as special assessments on the property. Currently, it is a requirement to have paved streets, water lines and sewer lines serving a lot before construction can begin. This was not always the case; however, which is why some neighborhoods had to petition later for those improvements.