Can you imagine every house was built like that? To get to the back of the house you need to go in the house? I personally think it's too crowded and alters the streetscape dramatically.
The funny thing about these duplexes getting approved is the side setback....0m. The garages are right up on the boundary, i would be pissed if i lived near one of those chicken coops. This one is only like 205m2 if my memory serves me well...