This document describes a case of a Public-Private Partnership in a local city in Portugal. In the last years the governments of Portugal used in an intensive way this modality to do infrastructures of public interest and it’s known the financial consequences which many of those constructions brought to the state, mainly the highly value of costs associated with the constructions. But it isn’t just in the national governments that this type of contracts are being used, since the last years the local governments started to use this modality to do constructions that in the traditional way wasn’t possible because of the limit of borrowing that the municipalities are subject too. Because of the small dimension of these contracts, there aren’t a lot of studies about this because the information is very difficult to get. However, the studies in this area are very important, because if the contracts done by the local governments have the quality of those at a national level, we can have in hands a big issue since the financial consequences which could arise in the future for the population would increase and could be insupportable for some local governments and it should be needed to start to do renegotiations of the contracts to decrease the financial charges.