Jane's Apartment has two units: one which belonged to Jane Margolis (house number 325) and one rented to Jesse Pinkman (house number 323). While Jane was the landlady and manager of the place, the apartment is owned by her father, Donald Margolis. Each unit is quite small, with a living area, a kitchen, a bedroom, and (presumably) a bathroom. They each have a front door and a back door that leads to a shared backyard area.