"The guardian families are meant to protect the floors from total destruction. We have immortality and in most cases this is what brings us advantage. The low floor also doesn't possess high seals or any mental abilities that can possibly affect our immortality as the chosen ones are always the strongest families."
Noe was already within Kyoya's house.
Her reaction to the house's appearance was slightly exaggerated, but it was also because this alone showed that Kyoya was truly someone else. He possessed strength, charisma and treasures that matched these two.
She also got approval from Xaya to just step into the house, but Noe allowed Xaya to feel the pride, so this was just another attempt to feel more of this. Of course, the house was lacking, but one could see that the couple was taking care of it and that it was developing steadily.