Com base em esta revisão , acho que é Lady of Mazes por Karl Schroeder. A revisão menciona várias culturas no mesmo espaço, mas é mantida separada:
the venue is an AI-built ringworld near Jupiter, called Teven Coronal. Schroeder foresees a future in which entire realities—"manifolds"—inhabit the same physical space, and where there is little delineation remaining between the experience of the real and the experience of the virtual. The cultures of each manifold are kept discrete from one another by tech locks, the implications of which give the book its philosophical underpinning. The book's heroine, Livia Kodaly, is a diplomat between these virtual worlds.
E também menciona uma casa voadora:
Livia and Aaron are somewhat less feeble than those around them and take it upon themselves, along with Qiingi, to leave their ringworld in a flying house (which I want), to go to the neighbouring Archipelago and endeavour to discover the nature of the invasion and whether or not it can be stopped.