There is no single ideal timeline for the bathroom vanity to last longer. Wood, MDF fiberboard, glass, and stone are some of the more popular options for vanities. The materials in question can last up to 60 years in high-quality vanities, provided they are used consistently. Wood used for vanities in bathrooms must be treated to survive in a moist environment. The inherent water resistance of glass and stone also makes them better options. Depending on the type of paint used and whether or not it is water resistant, painted vanities may need to be repainted every few years.