Downtown Jacksonville & Springfield Downtown Jacksonville is undergoing a number of sweeping changes in both housing options, new nightlife options and government amenities, such as a new main library. Downtown is home to many thriving businesses and the headquarters of CSX Corp., a Fortune 500 company. There is a strong push to create new housing opportunities in the urban core. Developers have converted former office spaces into luxurious loft apartments and condominium developments unlike those previously available in the River City. Travel North on Main Street and you enter one of Jacksonville’s re-emerging neighborhoods, Springfield. Home to Victorian-era architecture, Springfield is experiencing new home construction balanced with a mix of historic remodeling that is luring in new investment and new families.