"House" here must mean "family"; Romeo's family is the Montagues and Juliet's the Capulets.
Capulet
Montague
The only thing which Romeo gets into Juliet's house is himself, and he does it twice
Romeo plans to enter Juliet's house by scaling her wall.
She is a Capulet.
Juliet doesn't want Romeo to think of her differently because she is a Capulet.
Romeo and Juliet first met in a feast at Capulet's house.
Tybalt sends Romeo a letter containing a challenge.
romeo was sent to mantua after killing Tybalt
When Romeo is banished, he goes to his lady's house(Juliet) and spends the night. Then, when Romeo leaves, most believe he left by a horse lent by his father.
yes
If you did the Romeo and Juliet quest its that same house.
Romeo and Juliet are (gold)fish.
Tybalt sends a letter round to the Montagues' house to challenge Romeo.