Tourism and additional to IMI inflate prices in the market. Cascais and Sintra and Oeiras lines are some of the places sought. 343 thousand euros. This was the average price that each foreigner paid for houses they bought in downtown Lisbon in the last year and a half, according to Confidencial Imobiliário. Faced with this scenario, even those who are not Portuguese and are looking for a better home are already fleeing the city.