A semi-detached house is a type of residential building that shares one wall with another house. This design typically features two homes that are mirror images of each other, providing a balance of privacy and community. Semi-detached houses are common in urban and suburban areas, offering a cost-effective housing option for families. These homes often have their own entrances, gardens, and outdoor spaces, making them appealing to many buyers. The shared wall helps reduce construction costs and can lead to lower heating expenses. Semi-detached houses are popular in countries like the United Kingdom and Canada.