Yes it is actually
You left your bra at my house.
No! "I am in the house" "I am at home" "I am home" "I am in the home of ___" are correct.
yes
Yes, it is grammatically correct to say "The haunted house looks very mysterious to you." You can also say "You find the haunted house very mysterious."
No, but "I didn't go out of our house" is correct.
I would say Thanks for accepting me in your home, rather than house...
Justin's house is white.
many people pronouce it "bye-ber" it is actually pronounced "bee-ber" also some say Justin beaver
Bricks ------------------- Yes, but it is also correct to say it is a brick built house (not a bricks built house).
My father's house. The apostrophe shows that your father is in possession of the house.
yes but you could also use : 'the house was facing to the west'
if they live together than it should be Grandma and Grandpa's house because they have eqaul ownership of the house