What type of house is built in a row, sharing walls on each side?

The correct answer is a terraced house, which is characterized by being built in a continuous row of generally identical houses that share walls on either side. This architectural style is common in urban areas where land use is maximized. The design allows for a larger number of homes to be constructed within a given space, making it an efficient use of land, often leading to a sense of community due to the proximity of neighbors.

This type of housing is often seen in cities where building space is limited, providing both affordability and accessibility to homeowners. The uniformity in design can contribute to a cohesive streetscape, making terraced houses a recognizable feature in various towns and suburbs.

In contrast, a duplex refers to a house that is divided into two separate living spaces and typically shares one wall, while a semi-detached house consists of two individual residences built side by side, sharing a wall. A detached house stands alone, not sharing any walls with neighboring houses. Understanding these distinctions helps clarify the unique identity and function of each house type in urban and suburban planning.