Crowley glanced at Aziraphale when he moved and his lips quirked up into a small smile, but only for a moment before he returned to his usual aloof demeanor. "Should we bother to let them know we will be sharing an apartment?" He didn't care one way or the other, but if they did that maybe they could get a bigger base to work from if they did.
"So let's see, we'll need a room for you. A room for me. A room for my plants. A room for your books." He thought about that and shrugged. "I don't know what else." He knew Aziraphale would think of more things they'd need, but he knew all he needed was space for him and a space for him to restart his plant collection. That would mean his space would need a large window or sunroom. They could manage that.