In terms of a house's foundation and services, what does an attached single-family house indicate?

An attached single-family house generally indicates that it has its own utility services. This means that while it may share a wall or be physically connected to another unit—like in a townhouse or duplex—it operates independently in terms of utilities such as electricity, water, and gas. Each attached unit typically has its own service lines and meters, allowing homeowners to manage their own utility consumption separate from their neighbors.

In the context of the other options, sharing services with neighboring properties would apply more to condominiums or multi-family units where common utilities are present. An attached single-family house may be on its own plot of land, but this does not inherently imply that it shares services or is part of a condominium structure, which has its own legal and ownership distinctions. Therefore, owning an attached single-family house ensures that the owner is responsible for their own utility services.