Spain is often portrayed as a country where people live in houses that are larger than necessary. According to Eurostat, more than half of the Spanish population lives in homes considered “under-occupied,” meaning they have more rooms than required for the number of residents. At first glance, this statistic suggests that housing space is being inefficiently used. However, a deeper analysis reveals that the issue is more complex and reflects broader social, geographic, and economic dynamics within the Spanish housing market. One important limitation of the Eurostat indicator is that it measures the number of rooms rather than the actual size of homes. When housing is analyzed in terms of square meters, a different picture emerges. Data from Spain’s National Statistics Institute (INE) shows that the average size of homes has actually decreased significantly over the past decade. In 2011 the average dwelling measured about 84 square meters, but by 2021 the figure had fallen to around 65 square meters. This decline suggests that housing is not becoming larger but rather smaller, partly due to the division of larger apartments into smaller units, especially in major cities after the 2008 financial crisis. Geography also plays a key role in explaining the apparent contradiction. Larger houses are more common in rural areas and small towns, where land is cheaper and single-family homes are more frequent. In contrast, large metropolitan areas such as Madrid or Barcelona are characterized by smaller apartments due to higher land prices and greater population density. As a result, the distribution of housing space is uneven across the country. Generational factors further complicate the situation. Many older adults continue to live in homes they purchased decades ago to raise their families. Once their children move out, these houses may appear under-occupied. Yet relocating to smaller housing is often difficult because property prices and rental costs in urban areas are extremely high. Ultimately, Spain’s housing challenge is not simply about homes being too large. Rather, it is about the mismatch between housing distribution and demographic realities, highlighting the need for policies that improve housing accessibility, flexibility, and renovation of existing homes.