Remodel means changing the structure or shape of something. If you are looking to renovate your bathroom, you are looking to change its appearance. If you are looking to renovate your bathroom, you are looking to repair or upgrade it.
Renovations usually work to change the look, structure, or function of a workroom. In other words, remodeling works to improve or change the existing design and layout of the room. Renovation refers to the "change" or "change" of a building or house.