On average, installing a tiltilg or pivoting mirror in your bathroom costs $120-$150, whereas installing a medicine cabinet recessed into the wall with light fixtures and magnifying mirror costs $500-$700. Types. There are nearly as many types of bathroom mirrors as there are types of bathrooms in the world. 1  The type you choose will likely be based on the style of your bathroom, the amount of space you have to install it in, any special needs you may have for the space, and your personal taste.