315 ILCS 20/3-3
"Development Cost" means the amount determined, either prospectively or otherwise, by the Redevelopment Commission to be the actual cost of the Development and includes, among other costs, the costs of planning the Development, including preliminary studies and surveys, neighborhood planning, and architectural, engineering and legal services, the costs of financing the Development, including carrying charges during construction, the cost of the Real Property included in the Development, the cost of demolition of existing structures, the costs of landscaping and roadways, the cost of installation of water, sewer and other utility services, the costs of construction, equipment and furnishing of buildings and improvements, including architectural, engineering, builders' and legal fees, the costs of reconstruction, rehabilitation, remodeling or repair of existing buildings, improvements and of utility services, the cost of management and operation until the Development is ready for use, and the cost of improving that portion of the Development Area which is to be devoted for use as a park, playground or recreation center, together with such additions to Development Cost as result from additions to the Development in accordance with the original Development Plan or amendments thereto.
315 ILCS 20/3-3