The real estate price in Rio de Janeiro is the highest in Brazil, partially due to the growing importance of the megacity, according to a research published on Wednesday.

According to the FipeZap real estate price indicator, the average price of real estate per square meter in Rio reached 8,358 reais (about $ 4,135) in September, higher than the 8,143 reais ($4,031) in the capital city Brasilia, which previously held the "most expensive city" title.

Rio's figure is much higher than the national average, which is 6,832 reais ($ 3,382) per square meter.

The price of an apartment in Rio can even be much higher, FipeZap said, adding the average price in high-end neighborhoods can easily double the figure of 8,358 reais, such as the resort area Ipanema's 16,984 reais ($ 8,400).

In the past few years, the real estate price in Rio has undergone a significant increase, partially attributed to the growing importance of the metropolis.

Rio hosted a major UN development conference earlier this year, and will hold some games of the 2014 FIFA World Cup including the final match and the 2016 Summer Olympics.