Well of course I thought that ...
I'm glad I asked because what you see as obvious, other won't see at all.
Demons do and can inhibit christians. They'll stay there as long as they're not identified and kicked out. Often they're live in the mind, which can cause great battles, because you can have the thoughts of God, your own thoughts, and demonic thoughts all rising in the mind.
Which is why we must be transformed by the renewing of our minds. We have the mind of Christ, but we just need to listen to it.
Because the dream was about your house (or your ideal/dream house), I believe the dream is saying this is about you, and something you need to kick out of you (deliver out of you).
So when you 'see' a demon, you can look at the characteristics of what it looks like to see what is does. Which is kind of what you've done. Except you said it was bound, but you didn't say it looked like ti was bound with anything.
So maybe look at it this way and see if it rings any bells...
It doesn't have legs - powerless, limited movement
Like a big baby - speaks of something trying to operate in immaturity/keep you in immature thinking
Acting like a hurt child - using this as a way of controlling/manipulating you
Being in the bathroom would represent a place of cleansing - which speaks to me that you need to be cleansed of it, but it's arguing with you to try to stay - you're winning the war because you know IT HAS NO RIGHTS NO MATTER WHAT IT SAYS.
Tell it to GET OUT and don't argue with it. Then stand your ground and don't let it back in - this is the most important part of overcoming.
Be blessed. Christ was won the victory over this - you just have to enforce it.