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In 2025, there were roughly ** building permits for multifamily housing units granted in the United States. The number of housing permits authorized accounted for over **** of the total number of housing permits and saw a slight increase in 2025. In contrast, the number of building permits for single-family housing units declined.

Multifamily housing projects on the increase

Multifamily homes refer to buildings that contain at least two housing units, including apartment buildings and duplexes. In 2022, building work had started on over **** a million multifamily housing units in the United States – the highest number recorded in the past decades, but those numbers have fallen significantly in the years after that. However, it is expected that multifamily housing starts will grow again in 2026.

What are the trends in size of different properties?

One of the noticeable differences between multifamily and single-family housing is the size of the units. In 2023, the median size of a multifamily unit in the United States was over square feet. In contrast, the median size of a single-family housing unit that same year was well over as large.