Can You Swap Single Vanity for Double Sink?

Joan Jul 01, 2026

Ever found yourself wishing for a little more space in your bathroom? Perhaps you've been daydreaming about a double sink vanity to accommodate both you and your partner's morning routines. But can you replace a single vanity with a double sink? The answer is a resounding yes, with a few considerations to keep in mind.

Replacing a Single Sink Vanity with a Double Sink Vanity
Replacing a Single Sink Vanity with a Double Sink Vanity

Firstly, let's address the elephant in the room: space. Double sink vanities are indeed larger than their single counterparts. However, with strategic planning and measurement, it's often possible to fit a double sink vanity into a space previously occupied by a single one.

29 DIY-Friendly Double Sink Bathroom Vanity Upgrades
29 DIY-Friendly Double Sink Bathroom Vanity Upgrades

Measuring Up: Space Requirements

Before you start shopping, grab a measuring tape and get to work. Measure the length and width of your current vanity, as well as the space available in your bathroom. Keep in mind that double sink vanities typically require at least 60 inches of space, but some can be as wide as 72 inches.

DOUBLE VANITY Do It YOURSELF Install | Single to Double Vanity | How to Install a Bathroom Vanity
DOUBLE VANITY Do It YOURSELF Install | Single to Double Vanity | How to Install a Bathroom Vanity

Also, consider the depth of the vanity. Standard vanities are around 21 inches deep, but some can be shallower or deeper. Ensure that the vanity you choose fits comfortably in your space, allowing for easy access to cabinets and drawers.

Vanity Depth: More Than Just Width

Remodeling Our Master Bathroom – The Beginning
Remodeling Our Master Bathroom – The Beginning

Vanity depth is often overlooked but plays a crucial role in functionality. A deeper vanity provides more storage space but may make the bathroom feel smaller. Conversely, a shallower vanity can make the room feel more spacious but may lack storage. Consider your storage needs and the overall aesthetic you're aiming for when choosing a vanity depth.

Additionally, consider the height of your current vanity. Standard vanity heights range from 32 to 36 inches, but some can be as tall as 39 inches. Ensure that the double sink vanity you choose has a similar height to maintain a cohesive look in your bathroom.

Plumbing Considerations: Water Supply and Drainage

Origin 21 Alise 60-in Agreeable Gray Undermount Double Sink Bathroom Vanity with White Engineered Stone Top (Fully Assembled) Lowes.com
Origin 21 Alise 60-in Agreeable Gray Undermount Double Sink Bathroom Vanity with White Engineered Stone Top (Fully Assembled) Lowes.com

Replacing a single vanity with a double sink involves more than just swapping out the furniture. You'll also need to consider the plumbing. Double sink vanities require two faucets, two drains, and potentially two water supply lines. If your current plumbing setup isn't equipped to handle this, you may need to hire a professional plumber to make the necessary adjustments.

However, if your current vanity is centered under a window or other architectural feature, you may be able to use the existing plumbing by installing the double sink vanity in the same location. Always consult with a professional if you're unsure about your plumbing capabilities.

Design Considerations: Style and Aesthetics

Double Sink Bathroom Vanity Ideas
Double Sink Bathroom Vanity Ideas

Once you've determined that a double sink vanity can physically fit in your space, it's time to consider the design. Double sink vanities come in a wide variety of styles, from modern and minimalist to classic and traditional. Choose a vanity that complements the overall aesthetic of your bathroom.

Also, consider the faucet and hardware. Double sink vanities often come with two faucets, but you can also choose a single, wide faucet that spans both sinks. The hardware, including knobs and pulls, should match the overall design of your bathroom.

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a bathroom with two sinks and a large mirror
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Countertop Materials: Durability and Aesthetics

Countertops are a significant design element in any bathroom. When choosing a countertop for your double sink vanity, consider both durability and aesthetics. Popular countertop materials include quartz, granite, marble, and solid surface. Each material has its own unique properties and requires different care and maintenance.

For example, quartz is highly durable and low-maintenance, while marble is more porous and requires regular sealing. Consider your lifestyle and budget when choosing a countertop material. Also, ensure that the countertop you choose is compatible with the vanity you've selected.

Sink Styles: Undermount, Vessel, or Drop-In?

Double sink vanities can accommodate various sink styles, from undermount and vessel to drop-in. Each sink style has its own unique aesthetic and functional benefits. Undermount sinks are installed below the countertop, providing a seamless look and easy cleanup. Vessel sinks sit on top of the countertop, adding visual interest and often requiring less precise countertop cutting.

Drop-in sinks are installed from above, fitting into a hole cut into the countertop. They are typically less expensive than undermount or vessel sinks but may be more difficult to clean. Consider your design preferences and functional needs when choosing a sink style.

Incorporating a double sink vanity into your bathroom can greatly enhance its functionality and aesthetic appeal. With careful planning and consideration, you can create a space that's both beautiful and practical. So, go ahead and start browsing those double sink vanities – your dream bathroom is within reach!