Abyssinians are among the most spatially demanding cat breeds, not because they need a large floor plan but because they need vertical territory. These cats are natural climbers and jumpers, and a home that only offers ground-level living space will leave an Abyssinian frustrated and under-stimulated. The single most important investment you can make is maximizing vertical access through cat trees, wall-mounted shelves, and elevated perches.
In terms of raw square footage, an Abyssinian can adapt to apartment living as long as the vertical dimension is addressed. A small apartment with floor-to-ceiling cat shelving and multiple elevated resting spots will satisfy this breed far more than a large open-plan home with nothing to climb. Think of your living space in three dimensions rather than two when planning for an Abyssinian.
Window access is also critical. Abyssinians are intensely curious and visually engaged with the world outside. A window perch or shelf positioned near a window with a view of birds, trees, or street activity provides hours of passive enrichment. Multiple window perches throughout the home allow the cat to rotate vantage points throughout the day, which mimics the kind of environmental variety they crave.
If you have outdoor space, a secure catio or enclosed balcony can dramatically improve quality of life for an Abyssinian. These enclosures allow the cat to experience outdoor sights, sounds, and smells without the risks of free-roaming. Even a modest catio with a few shelves and a hammock can become the cat's favorite spot in the home.