here in inner Sydney, close to the Harbour my problem is cockroaches & I keep a bottle of surface spray in each room! Tho as it's winter there are not so many now, they were a plague in the warmer weather!! And THEY will be back as the weather warms as they do like older buildings.
I live in an old (WW1) 4 storey block of apartments, surrounded by bigger & smaller buildings which block any view of the harbour. My predecessors who lived here from 1788 would have had seen more wildlife
quote - Yes, there are snakes in Sydney (ie. wider Metropolitan area). Any suburb with natural bush areas, or overgrown areas, will have snakes, particularly North Shore, Lower North Shore, North-West suburbs. Inner-city suburbs with no natural bush areas will not have snakes (that's us)