According to IRC, what is the maximum stories allowed for single-family dwellings?

The International Residential Code (IRC) limits the number of stories for single-family dwellings to a maximum of three stories. This is primarily to ensure safety, simplify the construction process, and provide adequate access for emergency services. A three-story structure includes the main living areas, which can accommodate more complex designs while still remaining manageable concerning structural integrity and accessibility.

Maintaining a three-story limit also reflects the typical residential construction practices and the anticipated needs of occupants, particularly in relation to egress and fire safety standards. Therefore, the correct choice aligns with IRC standards, which seek to balance livability with safety regulations in residential building practices.