On the topic of the Simpson house layout...
Parts of the house have been known to switch around based on the needs of the episode. For instance the closet/stairs to the basement. They have both been known to be right next to the normal stairway at the end of the entryway. But in the isometric image posted above they were permanently moved to someplace you never really know is there. In the garage...
It's the basement
(unless that's a joke I'm not getting?)
This Isometric cross section is really cool (from deviantart).
See, this is pretty damn accurate as you can get if you need to make things static. I never would have pictured it in the garage though. Especially since that never happens. There's never EVER a basement under a garage since a garage needs a solid concrete floor. And the way it's drawn here means it can't be there. But then again from how this is drawn shows that they couldn't fit in the closet in front of the kitchen. Normally stairs are lined up in a row with stairs going up being right above stairs going down...
I think that one is wrong. There is a strange room where the garage should be. I think it is more like this.
In this image the stairs make no sense at all. Especially that weird 4 door tiny "hallway" that connects to the basement stairs, dining room, bathroom AND kitchen at once. And the top of the upstairs has a little part that goes down on both sides? Nope. These blueprints are the least accurate I've ever seen. The isometric view is the closest you can get aside from the completely wrong basement stairs.
This room of course was used this one time for that one scene, and in the isometric image it is correctly placed. You can tell because of where the treehouse really is located outside the house.
This was posted in the previous thread
This is incorrect too. It also has the basement stairs in the garage where it would be dangerously inaccurately placed
Hmm, I always thought that was from that one episode where Homer turned the garage into a bar to spite Moe. Doesn't looks like the basement to me.
That is correct though when applying to the colored blueprint above. That is indeed the bar, and that thing on the left wall is the urinal he installed.
See there's really no accurate way to build the Simpsons house as it changes slightly when needed. The main problem is the basement stairs. They should be under the normal stairs, but have never been accurately drawn that way. Especially the scene where Homer takes a bunch of bowling balls downstairs and the bulb is gone. This episode has him walking straight down the stairs. But the placement of the door SHOULD be to the left with the stairs aligned with the normal stairs above it like normal houses. Or at the very least the kitchen has a door directly to the basement which would support the bowling ball scene. But not the way it's been drawn above at all. That bowling ball scene has him quite plainly in the entryway. The closet that has always been a closet is now a basement stairs against all logic. This location is once again solidified in the Beer Baron episode where it is also clearly shown as at the end of the entryway hall. Yet in many episodes it is a closet. So maybe the closet is the incorrect location and it's always stairs unless it needs to be a closet? Would make sense. The basement would be right where it needs to be, that is right under the kitchen/rumpus room and would allow for the basement Bilco doors in the right place. Which would also mean there's no basement under the left side of the house at all. But this is now the theory I am going to live with.
So in summation:
Door at end of entryway between upstairs and living room is basement stairs.
Unless needed to be closet as in 3D Halloween episode and a few others.
Basement stairs theory supported by placement of basement under house and location of backyard Bilco doors.
Left side of house has no basement at all. Only right rear quadrant as there is no basement under the garage for safety/foundation reasons.
None of the above layouts are correct, but the colored 2D ones above are the closest if you replace the closet with the basement stairs and remove the stairs from the garage.
Although it's a damn cartoon and I just spent a half hour researching cartoon logic. Then again it is what I do best. Sadly.