Thanks for that URL. Nearly the nadir of design. The first design I saw (1/100) had 1766 square feet on one floor and they couldn't manage to provide an entry foyer/vestibule/hall. You enter right into the dining room, and have to walk 15 feet through it to put away your coat and your boots.
It did have a kewl "vaulted den" though.......
To the OP, anything you get for free is probably worth what you paid for it. Why do you want "sample house plans"? Say it's not for inspiration! If you are looking for samples of (North American) construction drawings you can find some in PDF format on my site.