After having trouble finding a new apartment, I asked my landlord if I could stay an extra month beyond my lease in my current apartment. He hadn't rented the place and said this was fine.
Stupidly, I assumed I would pay him my current rent for the extra month. I just got my rent bill and it is for about 80% more than the previous rent.
Can he do this? I see elsewhere on the site that 30 days notice is required for a rent hike. Does this hold for my current situation?