In this paper, the heterogeneity of the Paris apartment market is addressed through assessing the differences in the hedonic price of housing attributes over the 2000-2006 period for various price, hence income, segments of the housing market. For that purpose, quantile regression is applied to the 20 Paris "arrondissements" as well as to the 80 neighborhoods, called "quartiers" -or quarters -(each "arrondissement" is composed of four quarters), with market segmentation being based on price deciles (deciles 1 to 9). The database includes some 159,000 sales spread over a seven year period (2000 -2006). Housing descriptors include, among other things, a price index, building age, apartment size, number of rooms and bathrooms, unit floor level, the presence of a lift and of a garage, the type of street and access to building (boulevard, square, alley, etc.) as well as a series of location dummy variables standing for both the "arrondissements" and the quarters.Findings clearly suggest that hedonic "relative" prices of several housing attributes significantly differ among deciles, although discrepancies tend to vary greatly in magnitude depending on the attribute. Among other findings, the elasticity coefficient of the size variable, which stands at 1.07 for the first price decile (cheapest units), is down to 1.03 for units belonging to the ninth one (dearest units). The number of rooms, of service rooms, of bathrooms, the housing type, the apartment floor level as well as the number of parking slots all exhibit strong implicit price fluctuations among deciles while it is less so for the building period that affect prices in a more uniform way. Finally, the lower the apartment price, the higher the potential for price appreciation over time.