I lived in the house where Ferris Bueller's Day Off was filmed. As to the comment that Ferris' room was modelled after John Hughes', I can tell you that my own room was very similar to Ferris' room in the movie. I had flags on the walls and ceiling, posters of new wave rock bands, etc. I think the reason that they didn't use my room was because it was too small.
The dog door seen on the door leading out of the kitchen was added just for the movie, and replaced immediately after the filming was done. The peep hole in the green gate where the Mr. Rooney looks through to see the dog was drilled especially for the movie. There were actually two dogs, one trained to be calm (the one seen sleeping through the peep hole, and the another one who chased Rooney - a more hyper dog.
I've got a "Bueller Family" photo with the two siblings who were cut out of the movie. It hung on the wall of the hallway Ferris walked down going to the shower.
There was a tall Eucalyptus tree in our back yard that was covered with some sort of plastic covering to make it look like a tree found in Illinois.
In Ferris's family, everyone was romantically involved! Matthew Broderick was in real life seeing Jennifer Grey at the time of filming, as were his 'parents' in real life --they were married shortly after the movie was completed.
The film makers used 4 replica Ferrari 250 GT's during the movie. They were manufactured by Modena Design and Development of El Cajon, California. It's a hand-built production sports car and each one takes about six months to build. The car is not a Ferrari, but Modena's Classic GT250 borrows heavily from the looks of the 1961 Ferrari 250 GT California Spyder. Modena's car also does not carry a Ferrari logo, but the prospective customer may add one if he/she wishes. The car body is composed of fiberglass hand-laid into a single mold and the 5-liter Ford V8 engine propels the car from 0-60 in less than six seconds.
When Ferris opens his curtains after his parents leave the house, you see him through the outside window. In front of the window is a telephone wire with a squirrel sitting on it. It is a real squirrel, in fact they had trained 2 squirrels to run on the telephone wire. One escaped and is probably still in the sound studio and the other (which is seen on the wire) got a little stage fright!!
Alan Ruck and Matthew Broderick had previously worked several times together on and off broadway. Cameron's fake "Mr. Peterson" voice was based on old drama coach Ruck and Broderick used to study under. Hughes never met the man and didn't understand the little in-joke at all, but it cracked up the two actors so much they used it for the voice.
The art museum tour in "Ferris Bueller's Day Off" is inspired by John's real-life youth fondness for art and painting, which he pursued at the University of Arizona. (He eventually dropped out and never graduated.) He says the art museum scene in FBDO was added out of his own self-indulgence. :)
When the car goes through the glass at the end, all the glass in the entire garage had already been changed due to the fact the trees had given it a green tint over the years. If they had smashed the glass without taking it all out first, there would have remained an odd clear untinted window. Also, the first time you see the car in the garage it is a real Ferrari, but only then, as that car belonged to the guy that owns the garage, a rich man who collects cars.
The choreographer recruited a lot of street performers for the parade scene. My friend Ray and I auditioned and were chosen to perform.
We get a curtain call the night before the shoot and head downtown to meet in the basement of a church. Jugglers, a hat twirler, a woman who could backflip in high heels, etc., etc., and me and my buddy, Breakdancers.
Needless to say, the rain made filming slow and 9 hours later, we were cut from the film before we even got filmed. We were paid, but my 15 minutes a fame never even made it to the cutting room floor. But I do like to brag about it, from time to time.