The granny flat is very quiet, you can enjoy your times here.
The city is 10 minutes away by car. With the bus 115, 117 or 118 it may take 15-20 minutes to get into the centre of Adelaide.
The beach is a couple minutes drive from our house. Adelaide has the best beaches, Henley or Grange are just the closest ones.
Shopping centres are walking distance, one is 5 mins away, the other is 12 mins. The West Lakes Shopping Centre is a bit further, but easy access via bus 117 or 118.