Five small-apartment setups that use almost no floor space

In a studio, the window wall is usually the only unused vertical surface. A perch at sill height gives your cat a whole level of territory in a footprint of nothing.

For rentals where drilling isn't allowed, put a freestanding tower beside the window so your cat still gains height without a single hole in the wall.

Multi-cat homes need parallel routes rather than a single ladder — two cats should never have to pass each other on a narrow step.