Is it illegal to have a gun in your house?

The 2nd amendment to the Constitution grants everyone the right to bear arms (have a gun) for their personal protection, as well as the protection of your family, and your property. You do not need a gun permit to have a gun in your own house. Your gun does not have to be registered with the government either.

Actually, registration depends on where you are. There is no national registration, but a few individual states require it. CA, MA, IL, and IIRC, NY and NJ, and possibly a few others.