Home isn't always what others expect or what it's "supposed" to be in Mansfield Park. In fact, homes, especially the idea of what home is, are often unexpected here. Home is not a static, or unchanging, concept. Rather, the idea of home can change as people move to new houses, unite with new friends or lovers, or simply change their way of thinking. For some characters, home is a matter of memory, familiarity, and habit. For others, home is tied to wealth. But no matter what sort of definition of home is at work, different ideas of home remain a driving force behind characters' ideas and actions.
Home is an always evolving concept for the characters in Mansfield Park.
Home improvement is a running theme here, but it's a misleading one. Notions of "improvement" really have more to do with characters and their mindsets, particularly their thoughts on change, than actual houses.