The Americans with Disabilities Act standards for vanity heights with built-in sinks cites 29 inches for the minimum and 34 inches for the maximum height of the sink and cabinet. The top of these sinks lay flush with the cabinet. The average height of a vanity with a built-in sink is 32 inches high.

Comfort height bathroom vanities are 36″ tall to match the height of kitchen countertops. That's because the standard height of a bathroom vanity is 32″ compared to that of comfort height vanities that measure 36″ tall. This is a diagram of the 61″ Point Loma Double Sink Vanity.

That's because the standard height of a bathroom vanity is 32″ compared to that of comfort height vanities that measure 36″ tall. This is a diagram of the 61″ Point Loma Double Sink Vanity. The Point Loma is a comfort height vanity with a total height of 35 3/4″ which is just shy of the taller 36″ vanities.