The House

There are two parts to Alexander's house, that take shape in the form of wings that lead off from the main entry room and guest area. The right wing is the main living area for him. There is his bedroom, the kitchen, his smaller workshop, the small library and the salle. The left side holds the main library (with access to L-Space), his weapons room, larger workshop, room of things that he's found that are interesting (and very dangerous) and the observation room. Guest rooms can be added to the living area as needed, but as he rarely has any guests, he rarely has one open.

It exists in a place that isn't really anywhere. It's not in a pocket demension or anything like that, it's just between places. He has it completely locked down so that no one, not even a Caretaker can enter without his expressed invitation. He is completely aware of every part of the house, what is happening in the house and who (if anyone) is in the house. He has even made the entry into L-Space one way, so that he could come and go through it as he pleases, but others can not.