Abstract: A pet access door kit and method of installation in a screen door. The kit includes members attachable to the door screen to define a generally rectangular screen section adjacent a lower corner of the screen door. The screen material is cut within the defined area except for the upper extremity of the section, to form a screen flap, the upper extremity of the flap constituting a hinge portion. A suitable weight is attachable to the lower extremity of the flap to maintain it in closed position.