[MMM]

家　　うち　uchi is my home, but can also refer to my family or even to yourself (used in some dialects). It implies more than just the building you live in, but your "home".

家 いえ ie is someone else's home.

お宅 otaku is an honorable way of referring to an individual or house.

These are not all black and white, and you will hear people say "uchi no ie" referring to their own house.