Thirty-six percent. That’s the share of homes built in the U.S. last year that had three or more bathrooms, up from 26 percent in 2005, according to the U.S. Census Bureau. If you’re on the market for your first home, that statistic can help explain why you’re having a hard time finding something you can afford.

In the years since the recession, builders have devoted their energy to “move-up” homes, which is what the industry calls houses that are too expensive for most first-time buyers. The result is clear from the bureau’s report on the characteristics of new housing, released on Monday: New homes have more bedrooms, bathrooms, and parking spaces. If you prefer a more conventional measure, the median square footage for new homes has increased 10 percent in the past decade.