Among the set of factors taken into consideration during the design, planning and decision-making process of construction projects, the present article proposes that the ecological footprint and carbon footprint indicators be included in Construction Cost Databases (CCD), as they are simple, easy-to-use tools that make it possible to incorporate environmental aspects into project budgets. This research analyses the specific case of Andalusia's CCD in order to demonstrate the possibility of incorporating environmental aspects (ecological and carbon footprints) into the construction project budget, thereby creating a new "environmental budget". The proposed model is validated through the analysis of an industrial development project in Ecija, Spain; the results obtained are comparable to those of other footprint methodologies in the construction sector.