Welcome to the forum.
1st image
Doors are abnormally wide. For the windows, try using grey with tints toward a certain color, rather than shades of black.
2nd image
The pool looks good, and the fountain looks good, but they do not look good together. The pool is seen from almost directly above, while the fountain is seen from the side. the perspective used on the highest bowl of the fountain should be seen on the lower two and the circles in the base.