A growth of the real estate market has been observed in Brazil. The newspapers and magazines of main Brazilian cities contain many pages of ads for new real estate developments. There are many offers, many buyers and many deals. The real estate market is growing, meeting the needs of almost all social classes and employing a large pool of labor. A number of construction companies have been listed on the Sao Paulo Stock Exchange, having obtained capital funding for development projects. This market is finally getting an important role in Brazil’s economy, like the U.S., EU and OECD countries (Organization for Economic Cooperation and Development). However, it still lacks an indicator of market trends to enable an analysis of the investment, both for developers and for buyers. As a matter of fact, there is not a price index for the real estate market of any Brazilian city. This research concluded that for most Brazilian cities, it is possible to use the ITBI (Transmission of Real Estate Tax) and IPTU (Buildings and Urban Property Tax) databases for the creation of a municipal index of condominium prices (MICP). An index was created through a hedonic model that uses attributes from the ITBI database, plus a variable attribute which assigns a value to the location of the streets of a neighborhood (VR). This variable attribute was obtained from the plant of generic values (PGV), which serves as the basis for calculating IPTU. Based on the model used in the city of Paris, France, a new methodology was proposed and tested in the city of Rio de Janeiro. The division of cities into homogeneous regions, represented by one or more of the most important neighborhoods, enabled the achievement of a regional index and, by means of aggregation, a municipal index. The methodology is easy to replicate for most Brazilian cities of large and medium size that have a record of multi-family residential buildings and a general valuation platform. After those cities build their own indexes, it will be possible to obtain a national index. The results for Rio de Janeiro have validated that model.