^^Building on right: add color to the deck/porch part, it's too brown
Center building: just add trim to the overhang.
Left: The walls could use some flowerboxes perhaps for depth? And maybe trim around the tower.
That should do it. Oh, and fix the glitches with the flowers next to the brown fence, they pop through it.
It's all looking pretty good, just remember elevation changes, even slight ones, are your friend.