In Heinlein’s excellent story “–And He Built a Crooked House”, the house in question is in the shape of an unfolded tesseract. I’m wondering if anyone has actually built a house or other structure in this shape. Googling find something called “Little Tesseract House” but while it’s an unusual shape, it’s not in the shape of Heinlein’s Crooked House.
An unfolded teseract is just a collection of cubes, isn’t it?
Apparently a Stanford math student built one in 2nd Life. New World Notes: -- AND HE REZZED A CROOKED HOUSE
Yes. In this particular instance, it’s 4 cubes in a vertical stack, with 4 cubes attached to the sides (faces) of the second cube from the bottom.
It probably exists as a subset of this.
For an alternative definition of ‘crooked’ there’s the Wharton Eshrick Museum. A house built by the artist that has no right angles or flat surfaces. This picture doesn’t express it too well, it’s hard to appreciate how much this looks like a cartoon house until you see it in person.
How about this? But it’s upside-down:
Crooked? How about sideways?
It’s not a house, or even a real construction, but I love how, in Salvador Dali’s Crucifiction, Christ is shown crucified on such an “unfolded” tesseract:
I also like how, in his painting The Last Supper the room has the appasrent shape of a dodecahedron – a 12-sided figure, appropriate for a room holding 12 apostles:
“Crooked House” is one of a handful of Heinlein stories I got my mother to read, long ago. She laughed and said something like, “He doesn’t know crooked house.”
We lived in a postwar adobe house that didn’t have a 90-degree angle or a perfectly vertical wall in it. Was an immense pain to do even small remodeling, fit carpet to, or furnish. So I have said with a straight face, when this topic comes up, “Why yes, I lived in one.” 
I think a crooked man lived in one.
I can see someone doing this, for sure. It’s the way the rooms are supposed to interconnect that’s gonna be the bitch.
Hmm, was Eshrick pursued by the Hounds of Tindalos?
Had to look that up. I don’t know, maybe that’s why. All of his woodwork has a fantastical aspect to it.
Use strong beams and folding money. 
We had this contractor one time and he was usually drunk. I think that was the reason why he had such trouble with straight lines.
But I really don’t know.
If you want crooked - go to The Crooked House Pub in Gornal near Birmingham, England.
Six Flags Over Texas used to have an attraction called Casa Magnetica that was kind of neat. The whole thing was purposely built crooked to create sort of an anti-gravity optical illusion. Round objects would roll uphill. Water flowed upwards. Everybody looked like they were leaning way over compared to the walls. It was kind of trippy. The video on the linked page doesn’t do the effect justice, and the scripted stuff the guides/actors play out is painfully unfunny (though that could be seen as part of the charm). I believe it’s been closed for years.
If he can build this, Frank Gehry could probably build a tesseract house:
That sounds like the Casa Loca (Crazy House) that was an attraction at Freedomland, the amusement park built by Cornelius Vanderbilt Wood (who built Disneyland) in Queens, New York . It was BIGGER than Disneyland. But New York City is a lousy place to build a big amusement park – no parking, and nobody comes in the winter. It closed in three years.
A lot of stuff from Freedomland got sold to other amusement parks. They couldn’t move the Casa Loca, but they sold the plans to Clark’s Trading Post near Lincoln, NH (which got some other stuff from Freedomland). They rebuilt it as Tuttle’s Rustic House, and it continues to operate to this day:
Nothing like Heinlein’s unfolded Tesseract house, though.