Looks good though! Nice storage area in garage! Could you extend garage to fence line so you have more storage and have a roller door at the back for rear access?
That's what I meant by a parapet wall on the garage. You do need permission from neighbours to do it. And there are advantages and disadvantages...
Mum's neighbour built a bedroom right to the boundary line (formerly the carport space) and built a freestanding double garage elsewhere; in return for her permission they agreed to render Mum's side as their brick did not blend with her's but it never happened. For the sake of harmony she has let it go, and planted shrubs to screen it, but not everyone is so tolerant...!
Of course we told her she should have created a document for them to sign as this was all verbal, nothing in writing.