The main objective of this paper is to evaluate the expansion of urban areas over those significant to the preservation of ecosystem services in the region encompassed by the Strategic Master Plan for the Sustainable Development of the Metropolitan Beltway of Rio de Janeiro Area (PDAM), as a means to contribute to promoting sustainability and resilience of the cities encompassed by it. The approach used for this evaluation is that of ecosystem services, understood here as the benefits people derive from ecosystems. Throughout this paper, we have tried to demonstrate that the evaluation of the impacts of land use changes on ecosystem services and the inclusion of these impacts in urban planning decision-making processes can contribute to cities that are more sustainable and more prepared to face climate change. Two, out of a set of five, of the software offered by the Policy Support Systems initiative, developed by the King s College London and AmbioTEK CIC, were used in order to evaluate the impact of the Metropolitan Beltway of Rio de Janeiro on ecosystem services in the region: Costing Nature and Water World. The choice of these two tools was due to their free access and availability of information for processing - and more importantly, they have already been used successfully in several other studies on ecosystem services (POLICY SUPPORT SYSTEMS, 201-). Costing Nature, which was developed with the collaboration of UNEP – WCMC also, aims to provide support for sustainable management of Ecosystems Services, through the identification of priorities for conservation. According to the developers (POLICY SUPPORT SYSTEMS, 201-), the tool accounts and evaluates the ecosystem services generated in a given region, identifies its beneficiaries and appraises the impacts of human interventions. Water World follows the same operating philosophy and presentation of results, but is designed specifically for the assessment of hydrological ecosystem services and water management policies. While Water World presents its results in an absolute way, that is, in values and dimensions specific to each site assessed, Costing Nature uses relative rating, that is, compares all evaluated sites relative to the scale chosen by the user (global or local) and assigns them values between 0 and 1.