How many times does Nook's store grow?

Question

Right know I have Nookway. And I know you have to spend a certain amount of money for it to grow. What are those prices and what level of the store.

Answer 1

I don't remember what it is called, but it will grow to two stories. It's kinda cool. There is a code that you can use to get alot of money everyday, so you can pay off quicker for a bigger store.

Answer 2

I'm assuming you are talking about Animal Crossing. I haven't played it in a long time, but I believe there is only one more step after Nookway. Once Nook hires his cousins to come and help him with the shop, that is the final upgrade.