Atlas' house is not what Salem expected.
Well, okay, he's not actually sure what he had in mind. Maybe some sort of dark, spooky castle? An underground lair? He sure wasn't expecting a nice, sleek, well-kept house that is not only on the smaller side, but also... normal. It doesn't look evil at all, which Salem was fully anticipating.
Of course, it still suits Atlas pretty well. It appears to be made out of stone and some sort of black concrete-type material, no siding. It looks really modern, all sharp and square-shaped and minimalist. It's aesthetically pleasing, but Salem would bet money that it's not comfortable. It doesn't even look lived-in, but that may be in part because Atlas isn't here. Thank god.