7 Best Undermount Bathroom Sink Reviews of 2021

December 20, 2021
Best Undermount Bathroom Sink Reviews

Written by: Deane Biermeier / Facts Checked by; Ryan Cullenward / Products Tested by Licensed Interior Designers

  • Home
  • /
  • Blog
  • /
  • 7 Best Undermount Bathroom Sink Reviews of 2021

If you're looking for a bathroom sink that's easy to clean and maintain, an undermount installation might be your best bet. These sinks are installed underneath the countertop on top of the existing cabinetry to look more seamless with other fixtures in the room. And since dirt won't accumulate around them as quickly due to their position below eye level, it takes much less time or effort to stay cleaner than traditional models would require.

A great way to tie your bathroom design together is by choosing a sink that has the same shape as other fixtures. A rectangular or oval undermount bathroom sink can be found in many colors, including white, if you’re looking for something neutral and simple. Maintaining this consistency will allow the room to feel cohesive throughout when guests take their leave of it.

The beauty and elegance these sinks offer are unmatched. Why not choose something like one in white for its cleanliness or maybe go bolder by using black sink to add depth and glamour to any space.

Undermount Bathroom Sink Reviews

1. Best Overall: Caxton Rectangle

KOHLER K-20000-0 Caxton Under-Mount Bathroom Sink, White
  • Available in white color
  • Shape: Rectangle
  • Overflow drain
  • Material: Vitreous china

KOHLER K-20000-0 Caxton is the best rectangle undermount bathroom sink, available only in white color. The rectangular basin with overflow will accommodate any faucet, and it comes without holes for these fixtures; they're perfect if you want to mount your style on the wall or countertop. With a simple design that's as versatile as attractive and modern designs coming back into popularity, this elegant complement can go anywhere from traditional bathrooms to more contemporary styles. Install one today.

Pros and Cons
  • The drainage system is perfect.
  • Perfect in shape and are inexpensive.
  • The pop-up drain is excellent.
  • The color is not exactly white.

2. Runner Up: Rectangular

MR Direct U1611-W White Undermount Porcelain Bathroom Sink
  • Available in 2 colors
  • Shape: ‎Rectangular
  • 21" minimum cabinet size
  • Material: Porcelain

MR Direct U1611-W is vitreous china, rectangular undermount bathroom sink that features triple glazing and triple firing. This creates an impervious surface with no staining or chipping for easy maintenance. The addition of the trendy look below the vanity top means you can keep up with the latest trends without any hassles. It looks great in any setting or decorating theme because there are two colors for this single model: white (clean, classic look) or bisque (creamy soft tint).

Pros and Cons
  • The value is excellent.
  • This sink is beautiful.
  • The finishing is very excellent.
  • The pop-up drain is not present in the package.
  • The template to cut the counter is not correct.

3. Best Small Rectangular 

Kraus KCU-251 Elavo Bathroom Undermount Sink, 23 Inch, White
  • Available in white color
  • Shape: Rectangular
  • Standard 1. 75 in. Drain opening
  • Material: Porcelain, Ceramic

Kraus KCU-251 Elavo is the most durable undermount rectangular bathroom sink on our list. It is made from high-quality ceramic that will not scratch or stain easily and won't fade over time. All mounting hardware is included for a quick installation with your pop-up drain (it even comes in its box!). It has no scratches because of its premium baked-on glaze, which also resists stains and wipes clean well.

Pros and Cons
  • It is a beautiful and white sink.
  • The three overflow drain holes make it awesome.
  • Great shape and depth.
  • The drain pipe is not attached well.
  • The parts are missing for assembling.

4. Best Oval 

KOHLER K-2209-96 Caxton Undercounter Bathroom Sink, Biscuit
  • Available in 4 colors
  • Shape: Oval
  • Overflow drain
  • Material: Vitreous China 

Kohler Caxton Oval undermount sink is now available in four colors so that you can find the perfect match for your bathroom. The Kohler K-2209-96 comes with a durable vitreous china finish, and its overflow drain will keep water from spilling onto your countertop while also making sure that it goes where it needs to go instead of being wasted down the drain. Install this beautiful yet functional sink beneath a solid surface or granite counters to create an elegant look without compromising function.

Pros and Cons
  • The style is incredible.
  • It is straightforward to clean.
  • It is best in appearance.
  • It is not compatible with standard or large-size cabinets.
  • The little water stays and does not go down.

5. Best Black 

KOHLER K-2355-58 Archer Undercounter Bathroom Sink, Thunder Grey
  • Available in 6 colors
  • Shape: Rectangular
  • No faucet holes
  • Material: Vitreous china

KOHLER K-2355-58 is an excellent option for those looking to update their bathroom with a black undermount bathroom sink. This Archer Undercounter Lavatory features the transitional aesthetic of the Archer Suite, blending subtle design elements found in craftsman furniture's chamfering techniques and available in 6 colors.

The KOHLER K - 2355 - 58 has enough versatility that it can work well even if your decorating style changes often or you're not sure what color scheme would work best for your space (with so many options!). Weighing just ‎21.3 pounds., this durable Vitreous China sink provides years of reliable service without cracking, breaking, or peeling while resisting stains from hard water buildup.

Pros and Cons
  • It is a good-looking sink.
  • This sink is very functional.
  • None

6. Best White

KOHLER K-2214-0 Ladena Under-Mount Bathroom Sink, White
  • Available in white color
  • Shape: Rectangular
  • Overflow drain
  • Material: Vitreous china

When you purchase the KOHLER K-2214-0 Ladena, it will make your bathroom look like a spa. This particular sink is made of Vitreous China and has an oblong shape that makes for plenty of counter space in any bathroom style. The clean lines also work with almost any type or color scheme because they are so versatile! With curves that can be easily cleaned, this product offers you all the features to maintain a beautiful looking place.

Pros and Cons
  • It is a high-quality porcelain sink.
  • The water did not splash out of it.
  • It is in excellent appearance, and it does not look cheap.
  • The drain part is leaking.
  • The sink does not work with 18inches wide cabinet.

7. Best Square

MR Direct U1414-W White Undermount Porcelain Bathroom Sink
  • Available in 4 colors
  • Shape: Square
  • 18" minimum cabinet size
  • Material: Porcelain

Square undermount bathroom sinks are the most popular when it comes to design. MR Direct U1414-W is no exception. This sink will provide you with a deep, clean interior that has an overflow for your peace of mind and safety as well. With this porcelain beauty on display in your home, there'll always be something pretty to look at while getting ready or brushing teeth in the morning before work. It's also great for those looking for a small undermount sink that will stand out and give your space an added flare of glamour.

Pros and Cons
  • It is cost-efficient.
  • It is an excellent sink with a good counter-space.
  • It is easy to install.
  • The stopper is not flush well with the sink.


The Kohler Company is best known for its high-quality, innovative plumbing products. They have made it to the top of this list because they offer some of the most highly rated undermount bathroom sinks - so you can be sure that if you purchase from them, your money will not go to waste. We love about these items is how easy they are to install with minimal tools or expertise needed. We hope you’ve found the best undermount bathroom sink for your needs and are excited to install it in your home.

Disclosure: Sanitarysupply.org receives an affiliate commission on some, but not all, of the products we recommend—but only if you decide to click through to the retailer's site and make a purchase.

Deane Biermeier - A senior contractor and an experienced freelance writer - expert for reviews

Deane is an amazing freelancer with wide range of skills. He has good ideas and a prominent passion of writing. He is currently working on many websites including Sanitary Supply.

You may also like

Leave a Reply

Your email address will not be published. Required fields are marked

{"email":"Email address invalid","url":"Website address invalid","required":"Required field missing"}

Never miss a good story!

Subscribe to our weekly newsletter to keep up with the latest trends!