6,254 Saves | 19 Questions. Wainscoting. Tile or wood wainscoting in bathrooms is set to standard height at 45 to 48 inches. This typically allows for the vanity or cabinets to be placed just under for a clean, uniform look.Photo of a transitional bathroom.— Houzz.1,011 Saves | 8 Questions. Use beadboard as wainscoting in a bathroom to give it a nautical feel. Tip: An easy way to work out wainscoting height is to divide the height of the room into three, then cut your boards to two-thirds the height of the room. Photo of a traditional bathroom in Calgary.