Swampland was filled, sea walls were constructed and the yacht basin was created. Contracts were signed for the sewer systems, water pumping stations and utilities. Bal Harbour was the first planned community in Florida to have its utilities placed underground. Developers set guidelines for the development of the beachfront and the residential areas. Collins Avenue was paved into four lanes with a landscaped median and later widened to the present day six lanes. Village plans indicated that ocean front property was to be deep and lots approached $100,000. Lots in the residential area were about and cost from $6,500 to $20,000.