Finding a flat/room is not easy at the moment in Lisbon, so we advise you to start your search early.
When deciding about living in Lisboa or in the neighbourhood of FMH you should consider that the practical classes start rather early in the morning, and that it will take almost 1 hour to get from Lisbon to the Faculty by public transport.
Please find below the links for the Lisbon Erasmus Organizations, with very useful information for incoming students (especially about accommodation).