Umm, so, what do you have that has to go somewhere? A little detail would be helpful.

Library says “books”, so how many linear feet of books will you need to store? Office implies “work”, so what equipment do you need? For instance, my home office has a supply closet, four two drawer file cabinets, three four drawer cabinets, a large printer, desktop computer, adding machine, bulletin board, and six maps on the walls. In addition to my desk, I have three bookcases. In my library, a separate room, I have three built in bookcases, doors underneath, shelves on top, 72”, 60”, and 57”. To get all my books in the library, I had to give away several boxes of books and magazines. What do you need and want?