The building sector accounts for 40 percent of EU’s energy consumption. Following an EU directive Swedish real estate owners are obliged to perform an energy assessment of their buildings, for single- family houses particularly upon sale. The Energy Performance Certificates reports the building’s energy performance and suggest cost effective measures to improve energy performance. This implies that since 2009 Swedish home buyers have been able to compare energy performance between houses and weigh this information into the buying decision. Using a hedonic price model this paper examines whether better energy performance leads to a higher sales price, and whether the type(s) of suggested efficiency measures have any impact. Results indicate that better energy performance seems to affect sales prices positively. Having had energy efficiency measures suggested seems to have an impact on sales price according to type of measure: home buyers seem to require a larger “rebate” for more complex types of measures. The results also indicate a stronger positive effect on house prices for houses further away from the city centre, and a stronger positive effect for houses built before 1990.