As grooming is the main task in the vanity area, it’s important to have plenty of surface area to put things down. Although the twin sink configuration has been popular in the past, it often makes sense to have a single sink and more counter space. If you think about it, most people would say that the second source of water is less important than the additional countertop space. If you want to maximise the counter space, opting for a single sink vanity saves you the expense of the second sink and faucet. It also eliminates extra plumbing works and the less piping and fittings used means extra storage space inside the vanity.