Yes, a kitchen can be located in the southwest corner of a house or apartment. There are no strict rules or restrictions that dictate the specific placement of a kitchen within a building. The arrangement of rooms, including the kitchen, depends on the overall layout and design of the structure.
Traditional practices in some cultures, like Vastu Shastra or Feng Shui, suggest certain guidelines for room placements based on the cardinal directions. However, these guidelines are not universally followed or considered essential in modern architecture and interior design.
Ultimately, the positioning of the kitchen will depend on the preferences, needs, and constraints of the overall floor plan and the building's design. It's essential to ensure that the kitchen is functional, efficient, and suits the lifestyle of the occupants while adhering to local building codes and regulations.