The width of the right side of your current house loks lots bigger than the design with the addition. Different roof pitches also. I'd work on the final house design. Then do the garage/ pool house to relate to that more. The 3 garage doors could function better as 2 wider openings.

I understand these are AI images and not actual. I know it alters sizes, colors, etc to make things more attractive. I use it to give a visual of color schemes we are thinking. We are using an architect to design the pool house and garage. It will NOT be metal as that will not be allowed in our subdivision codes. We are using vertical siding and a brick skirting. We will paint the brick skirting and the brick on our house to match. I however know a few years down the road we want to add on to our house so I want to make sure what we do can make sense down the road.

I hope this is helpful information for anyone who commented as it seems my first message is not relaying well based on the comments.