Why is the picture not centered on the top?
The house appears to be centered in the picture, more or less.
However, since there’s another house right very close to it on the right side and empty space on the left, I believe this creates a little bit of an illusion of the house not being centered.
Personally, I think it looks fine.
Side note: If I was buying a house that nice I’d want a bit more space between my neighbor. :)
You may want to limit the absolute size of the top banner/image so it doesn't go past the width of the text area