"Again, my spells are made to stop people from coming in and not from leaving. If they arrive here, then they can leave. Kreacher can take them out without any damage to them if I'm not around." People usually forth how stealthy the house-elves could go and Kreacher could Apparate them while they couldn't.
He nodded. "Although, she's still a Hufflepuff, so it's not a surprise," he said, barely trying not to giggle like a school child. There were some stereotypes that survived through the generations. "He is and I don't blame him one bit. I would do the same if I were in his place. Too bad that his children aren't as paranoid, maybe not the older one, although his name- Really, why do that to his own son?" He snorted. "Now I have the mental image of someone trying that spell on Binns while he keeps teaching."
Regulus nodded. "That seems acceptable, although maybe we can do a library and an office, on two different floors. The rooms are only so big. If we put two desks, the bookcases and the couches, it'll be truly cramped. It'll be easier to work from home after the full moon." He grinned, because slowly the house was taking shape. "It'll be great, won't it?"
Remus' description of the house didn't get better as he spoke. "I liked London. I might not interact with Muggles, but I was still there, I could see what was happening. I could walk to Diagon Alley and King's Cross. I certainly didn't have to climb trees, but I could go to Hyde Park. I miss the energy of London."