Stoza Accessory Dwelling Unit. Companion Unit. Exterior Wall Treatment. Walkway treatment. Bathroom. Free standing accessory dwelling unit in Pacific Beach, CA. This unit is less than 300 square feet but feels larger thanks to exposed pine ceiling, both inside and outside floating above a mullion-less glass pane. Located above wall to wall sliding door. Finger jointed borneo mahogany exterior wall crowns the exterior of this little beach gem.