A Row House is a type of residential building that shares walls with adjacent houses, forming a continuous row. These homes are typically two or more stories high and are commonly found in urban areas. Row houses are designed to maximize space and provide affordable housing options, often featuring similar architectural styles and layouts. Row houses originated in Europe and became popular in the United States during the 19th century, particularly in cities like Philadelphia and New York. They are known for their efficient use of land and can foster a sense of community among residents.