The most expensive places to buy and rent By TPN/Lusa, in Business, Property · 05-02-2021 01:00:00 · 0 Comments With Covid-19 pandemic leaving its mark on society and the economy, Idealista has carried out a study, in which they analysed the most expensive and sought-after municipalities to buy and rent a house in Portugal. In order to carry out the different rankings, the average price of residential properties in the municipalities with more than 500 advertisements on Idealista, the largest real estate marketplace in Portugal, both for sale and for rent, per square metre (m2), between October and December 2020, as well as the average total price of the advertised houses, were considered.