Our official snake room is about 10'x10' we have the big cage in the living room as well as our GTP cage. Each of the kids also has a cage (or two) with their favorite snake/lizard/frog in it in their room. Our quarantine is a shelving unit out in the garage conversion and the rat barn is a 5 x 10 shed outside that is shared with the pool equipment.
Yes - the snakes have more run of our house than we do - LOL.
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Tosha 
"Nihil facimus sed id bene facimus"

6.42.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Anakin Skywalker)
0.0.1 Green Tree Python (Verdi)
0.1.0 Bredls Python (Smurfette)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Desert Tortoise (Pope John Paul aka JP )
2.2.1 Fish (1,2,3,4)
0.0.0 frogs rescued from pool skimmer
0.0.1 Lizard of unknown origin