Industrial parks are the backbone of every developed industry. They exist in various forms, differing in the composition of resident companies, their size and their underlying energy infrastructure. In the ERDF-funded research project “GRIDS - Green Energy for Industrial Networks” the potentials and improvement possibilities of innovative energy supply concepts in commercial and industrial parks were investigated. An elementary challenge is the prediction of the (bundled) energy demand, which is necessary for the ecologically and economically sustainable long-term design of energy supply concepts. The data available to planners and researchers for such projects is usually incomplete and undetailed or simply non-existent. Therefore, this paper presents an approach that uses statistical methods to provide better estimates of the bundled energy demand of business parks. This method supports the efficient planning of sustainable energy concepts.