What distinguishes a one-and-one-half story house from a traditional one-story house?

A one-and-one-half story house is characterized by the presence of an expanded attic space that is typically utilized for living purposes. This type of home design usually involves a main level with standard living areas and a second level that consists of a finished attic or loft space. This upper area often has lower ceiling heights compared to a full second story but can still provide additional rooms or a space that can be used for various functions, such as a bedroom or office.

This architectural layout differentiates it from a traditional one-story house, which lacks that additional living area above the main floor. The expanded attic in a one-and-one-half story home effectively increases the usable living space while maintaining the overall structure’s height and aesthetic.