In the literature, there is extensive, although in some cases inconclusive, evidence on the impact of Energy Performance Certificates (EPC) on housing prices. Nonetheless, the question of whether such an impact is homogenous across residential segments remains highly unexplored. This paper addresses this latter issue utilizing multifamily listing data in metropolitan Barcelona. In doing so, first the entire sample is analyzed using a hedonic model. Second, the sample is split on the basis of a multivariate segmentation. Finally, separated hedonic models are specified again. The results suggest that in general, there is a modest impact of EPC ratings on listing prices, nonetheless it is not homogeneous across housing segments: (1) for the most modern apartments, with state-of-the-art features and active environmental comfort, energy ratings seem to play a null role in the formation of prices; (2) conversely, for the cheapest apartments, apartments boasting the most basic features, and apartments located in low-income areas, the "brown discount" is enormously significant, potentially depreciating the equity of those who have the least resources to carry out an energy retrofit. These results have implications for the assessment of the EPBD and its Spanish transposition, since a very well-intentioned environmental policy could have potentially harmful social repercussions in the absence of corrective measures.Commission saw the EPC scheme as "a power tool to create a demand-driven market for energy efficient buildings (p. 5) [6].Among all the real estate markets, the residential one is a special case since, due to the size of its stock, it consumes much more energy than commercial properties [7]. In the literature, there is extensive, yet in some case inconclusive, evidence regarding the existence of market premiums for efficient homes. According to the studies reviewed in the next section, home selling prices can vary up to 30.5% (for rating A, the most efficient one, in relation to rating G as the most inefficient) in the Danish case [8] or as little as 5% (A/G) in the case of the Irish renting market [9]. However, there is evidence suggesting that EPC labels do not play any role in price discrimination in the Oslo market [1]. Differences in climate and energy costs in relation to home prices and, perhaps, environmental concerns may be behind such divergences. As such, there are no reasons to believe that the impact of EPC labels is stationary across housing segments within the same city, where household budgets, personal tastes, and priorities, as well as home attributes and prices also vary in a significant manner. As a matter of fact, in the office market, there is evidence suggesting that "green labels" are contingent to characteristics of buildings in the determination of prices [10].The aim of this paper is to test whether the impact of EPC ratings on housing prices is the same in different market segments within a city. This analysis is relevant since the identification of divergent impacts may help to orien...