Share. The average sink is about 8-inches deep. The standard height of a bathroom vanity cabinet is 32″. This is based on a countertop that’s 32-inches from the floor. To be ADA compliant, every fixture in the bathroom, including the sink, must be accessible to a person in a wheelchair.This places limits on the height of the sink … An above-counter vessel sink will naturally sit much higher than an inset below-counter sink, and so a vessel should be placed on a lowered cabinet to compensate. Lavatory SInks. If the plumbing is already … Ultimately, you should try a few different sinks and figure out the height … By Yanic Simard A bathroom layout is mostly a pretty easy decision. Keeping that in mind, the standard height for a bathroom sink drain rough-in is about 24-inches. Sep 13th 2014 8:37AM. The counter height is typically 32 to 34 in., but what’s actually more important is your sink height. Like with the other sinks, this height … Modern bathroom cabinets are 32 to 36 inches high, including the countertop. The Right Height for Your Bathroom Sinks, Mirrors and More. This is the distance from the sink rough-in to the finished floor. Modern bath cabinets have become taller in recent years in what is known as “Comfort Height Vanities.” Vanities come in a variety of height arrangements including standard height, comfort height, and vessel sink height. The ADA bathroom sink height requirements are fairly straightforward. Bathroom vanities range from 30″-36″ in height.