A duplex is a single residential building that contains two separate living units under one roof. While the spelling in your question (“Duplix”) is a common typo, it refers to this specific multi-family property type in real estate. Key Characteristics
Separate Entrances: Each unit has its own private door to the outside. There is no internal connection between the two homes.
Independent Amenities: Both living spaces are fully functional on their own, meaning each has its own kitchen, bathrooms, bedrooms, and living areas.
Shared Utilities or Structures: The units always share at least one common wall or floor/ceiling, and they sit on a single plot of land.
Single Ownership: Typically, the entire building (both units combined) is purchased and owned by a single individual or investor, unlike townhouses or condos which are usually sold separately. Common Layouts What Is a Duplex Apartment? Everything You Need To Know