Possible to build room under garage or pool?

Question:im doing a dream house for my geomotry class. also if anyone could give me ideas on like designs on my house like apool shape design or something. anything would be helpful thanks

Answers:
Yes , and is a fine idea .

You can build a room under the garage and take from it one expansion to be like a halfway to go around your pool if you want to put glass in the walks of the pool to see both ways . But the pool got to be builded within the project so it will hold on .

If you want to build a room under the pool if should be before building the pool so the pool will not sink into the room .