Permanent Door A-Jar

Keep your cat happy and your privacy intact with this no-cut rental-friendly "Cat Door"

This is a modified version of Isopoda's Door A-Jar that is intended to be permanently mounted to a door.
It also has a more aggressive angle for the latching mechanism that (on my door at least) allows the door to latch properly when it closes.

I removed my latch strike plate to install this, but that may not be necessary depending on your door.

This should work on most indoor US Doors.