Unfortunately it's more restrictive than just owner-occupied units. It's essentially an unlocked room (for up to 2 people) in someone's house/apt that includes

Unfortunately it's more restrictive than just owner-occupied units. It's essentially an unlocked room (for up to 2 people) in someone's house/apt that includes shared living spaces. For example, there are many multi-family houses where a family lives upstairs but can't rent out the downstairs apt.