DS is 9. Hes very sensible and has been asking for a little bit more independence recently. I feel like we may be babying him a little compared to his peers.
We live rurally and have a shop within a two minute walk. I'm thinking a good start to building some independence would be leaving him home if one of has to pop to the shop. We'd be back in ten minutes max. The naughtiest thing hes likely to do is enjoy some extra screen time and hit the treat cupboard 
Does this sound ok?
Among his friends there extremes of walking to school alone and supervising siblings to not being let out of a parents sight for two minutes so I've no idea what is 'normal' at this age.