The main objective ofthis paper is to study the resilience of current Spanish residential building stock to climate change impacts. Results showed that 72% of current residential building stock in Spain is not performing properly according to current climate conditions. During the 1981 - 201 O period, mean annual degree days based at l 5ºC diminished in 74% of Spanish provincial capitals, with an average rate decrease of 10.1 % in relation to the 1950-1979 period. Significant accelerating positive trends in cooling degree days and important decreases in heating degree days were found in the twenty-first century. Strategies and measures to support climate change adaptation of existing and future built environments through building codes and standards have also been explored.

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