The exterior of the house is very well built, in fact I would say it is one of my favourites that I have seen on the Gallery. Like everyone else said though; the trees look a little weird and lazily duplicated. Unlike Blake1 I actually like the mailbox colour and design...not really anything else I can say on that. Now the interior DOES look nice - I'm not denying that, but it does look very cramped and contains just too many Add-On bricks for my liking. Finishing on a positive side of the build however; I LOVE the plant designs that you have used both inside and outside.
Since you said to only rate the exterior, I give it an 8/10