The extraordinary urbanization contribution (EUC) constitutes a mechanism for urban equalization between private stakeholders and the Public Administration, designed to redistribute a portion of the land surplus value generated by territorial initiatives. This study introduces an evaluation approach applied to the case study of the Rome Agro-Food Centre (Italy), that, rather than relying on the static formula traditionally prescribed by local regulations, employs a dynamic method based on the implementation of the Discounted Cash Flow Analysis (DCFA). This method enables a more accurate assessment of the value increase arising from the urban planning amendment, thereby improving the effectiveness of the calculation of the EUC. The analysis demonstrates the potential of the DCFA in Public-Private Partnership initiatives, providing a replicable model for the economic-financial assessment of urban transformation processes.