Customer has added a mother-in-law cottage adjacent to his primary residence. "Cottage" is above a 2 car garage, connected to the primary residence via a fully enclosed "breezeway". Breezeway connects basement of primary residence with 2 car garage, with inside stairs leading up to "cottage".

Front of cottage has a small deck, at upper grade level, and I understand need for external outlet there. Where is "rear" of cottage? Rear is garage level; grade is at front......

I read somewhere that outside outlets can no longer be connected to inside circuits, but can't seem to find a code reference. Anyone know where or if it is true? A dedicated circuit for one outlet on a deck?

Thanks for help!

Grov