The choice for a double or single sink bathroom vanity is primarily influenced by the available space in the bathroom, among other factors such as the number of people sharing the bathroom and their personal space preference and selling power and decision. Usually, double sink vanities require a minimum width of 48 inches but are more common in standard sizes of 54 or 60 inches wide. Within Bathroom Vanities with Tops with double sinks, check out our Transitional, Traditional and Modern style options.

Typically, you will not find a double sink vanity smaller than 48 inches. That’s because even with 16 or 17 inch sinks, any less space would make these vanities non-functional and essentially useless. Some custom installations can be made with other sizes, but you’ll have to talk to your contractor about that. However, if prefabricated vanities are on your list, 48 inches is where they start.

Yes, you can replace a single vanity with an upgrade to a double vanity. However, you will also need to get a plumber on board to bring in the plumbing for that new sink, either from the wall or by splitting the current plumbing. This will add to the cost of the project significantly, considering that it’s about $450 to $1,800 to install plumbing for a new sink in the bathroom.