Officer's growth has happened quickly, which means plenty of streets still sit right on the edge of bushland, cleared paddocks, or undeveloped land waiting for the next stage of construction. That boundary between "built" and "not yet built" is exactly where a lot of pest activity originates.
Wildlife corridors, native vegetation, and open grassland all support established populations of ants, spiders, and rodents that naturally drift toward nearby homes once conditions change, whether that's a dry spell pushing them to seek moisture or construction disturbing their usual habitat. Streets backing directly onto this kind of terrain tend to deal with noticeably more activity than those positioned deeper inside an established estate.