Duplexes, courts and the wall you share
The Census counts about 4,600 East LA homes in buildings of two to four units, another 3,500 in buildings of five or more, and about 5,700 attached homes. In those buildings, bed bugs can move through outlet boxes, gaps along pipes and baseboards, and on belongings carried through shared hallways and laundry areas.
That is why we treat a bed bug call in a multi-unit building as a building question. We start in the unit where bites or bugs were found, then recommend which neighboring units should be checked β usually the ones on either side and directly above or below.
Sources: [16]
