Cats have complex territorial needs shaped by their solitary, wide-ranging wild ancestors. Meeting these needs in the confined spaces of domestic homes requires thoughtful environmental design that creates effective territory even within small footprints.
Indoor cat territory welfare depends on creating genuine psychological security rather than simply providing physical space. A cat in a small flat can have excellent welfare if it controls its key resources, has social interactions on its own terms, and has escape routes and elevated retreat positions. A cat in a large house can have poor welfare if it is chronically displaced from resources by a dominant housemate or denied agency over its own movement. The welfare-centred approach to indoor cat environment design asks: does this cat have choice and control? Can it access food, water, litter, and resting spaces without being intercepted by another cat or a pushy human? Does it have elevated retreat positions it can reach when it needs to withdraw? Are there sufficient scratching surfaces for scent marking? These questions reveal that small spaces can be enriched into good territory, and large spaces can be impoverished territory if key design principles are ignored.