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Undermount Bathroom Sinks

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Enhance the sleek and seamless look of your bathroom with our collection of Undermount Bathroom Sinks at The Sink Boutique. Designed for a clean and modern aesthetic, these sinks are installed beneath the countertop for a smooth, integrated appearance. Choose from a range of shapes, sizes, and materials to complement your bathroom's style. Undermount sinks not only provide a polished finish but also make cleaning a breeze.

Elevate your bathroom design with the understated elegance of our Undermount Bathroom Sinks collection.

Sale

Alternate Image for Nantucket Sinks Brightwork Home 20" Brass Bathroom Sink, TRB-OF

Alternate Image for Nantucket Sinks Brightwork Home 20" Brass Bathroom Sink, TRB-OF

Nantucket Sinks Brightwork Home 20" Brass Bathroom Sink, TRB-OF

$974.99 $1,299.99

Low stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, White, GB-13x10-W

Alternate Image for Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, White, GB-13x10-W

Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, White, GB-13x10-W

$206.00

In stock, ships in 1–2 days

Sale

Alternate Image for Nantucket Sinks Brightwork Home 48" x 14" x 6" Rectangle Undermount Stainless Steel Bathroom Sink, 18 Gauge, TRS48-OF

Alternate Image for Nantucket Sinks Brightwork Home 48" x 14" x 6" Rectangle Undermount Stainless Steel Bathroom Sink, 18 Gauge, TRS48-OF

Nantucket Sinks Brightwork Home 48" x 14" x 6" Rectangle Undermount Stainless Steel Bathroom Sink, 18 Gauge, TRS48-OF

$1,649.99 $2,199.99

In stock, ships in 1–2 days

Best seller

Alternate Image for Nantucket Sinks Great Point 17" Rectangle Undermount Ceramic - Vitreous China Bathroom Sink, White, UM-159-W

Alternate Image for Nantucket Sinks Great Point 17" Rectangle Undermount Ceramic - Vitreous China Bathroom Sink, White, UM-159-W

Nantucket Sinks Great Point 17" Rectangle Undermount Ceramic - Vitreous China Bathroom Sink, White, UM-159-W

$193.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 18" Ceramic Bathroom Sink, Bisque, UM-16x11-B

Alternate Image for Nantucket Sinks Great Point 18" Ceramic Bathroom Sink, Bisque, UM-16x11-B

Nantucket Sinks Great Point 18" Ceramic Bathroom Sink, Bisque, UM-16x11-B

$189.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, UM-19x11-W

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, UM-19x11-W

Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, UM-19x11-W

$193.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-17x14-W-K

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-17x14-W-K

Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-17x14-W-K

$175.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, Bisque, UM-17x14-B-K

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, Bisque, UM-17x14-B-K

Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, Bisque, UM-17x14-B-K

$175.00

Low stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 20" Ceramic Bathroom Sink, White, UM-18x13-W

Alternate Image for Nantucket Sinks Great Point 20" Ceramic Bathroom Sink, White, UM-18x13-W

Nantucket Sinks Great Point 20" Ceramic Bathroom Sink, White, UM-18x13-W

$189.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-16CW

Alternate Image for Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-16CW

Nantucket Sinks Great Point 19" Ceramic Bathroom Sink, White, UM-16CW

$175.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, Bisque, UM-15x12-B

Alternate Image for Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, Bisque, UM-15x12-B

Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, Bisque, UM-15x12-B

$171.00

Low stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, Bisque, UM-19x11-B

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, Bisque, UM-19x11-B

Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, Bisque, UM-19x11-B

$193.00

Low stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Brightwork Home 13" Stainless Steel Bathroom Sink, ROS-OF

Alternate Image for Nantucket Sinks Brightwork Home 13" Stainless Steel Bathroom Sink, ROS-OF

Nantucket Sinks Brightwork Home 13" Stainless Steel Bathroom Sink, ROS-OF

$524.99 $699.99

In stock, ships in 1–2 days

Sale

Alternate Image for Nantucket Sinks Brightwork Home 24" Stainless Steel Bathroom Sink, TRS2416

Alternate Image for Nantucket Sinks Brightwork Home 24" Stainless Steel Bathroom Sink, TRS2416

Nantucket Sinks Brightwork Home 24" Stainless Steel Bathroom Sink, TRS2416

$749.99 $999.99

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 24" Ceramic Bathroom Sink, White, UM-2112-W

Alternate Image for Nantucket Sinks Great Point 24" Ceramic Bathroom Sink, White, UM-2112-W

Nantucket Sinks Great Point 24" Ceramic Bathroom Sink, White, UM-2112-W

$226.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, White, GB-15x12-W

Alternate Image for Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, White, GB-15x12-W

Nantucket Sinks Great Point 17" Ceramic Bathroom Sink, White, GB-15x12-W

$211.00

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, Biscuit, UM-13x10-B

Alternate Image for Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, Biscuit, UM-13x10-B

Nantucket Sinks Great Point 15" x 12.125" Oval Undermount Ceramic - Vitreous China Bathroom Sink, Biscuit, UM-13x10-B

$168.00

Low stock, ships in 1–2 days

Sale

Alternate Image for Nantucket Sinks Brightwork Home 24" Brass Bathroom Sink, TRB2416-OF

Alternate Image for Nantucket Sinks Brightwork Home 24" Brass Bathroom Sink, TRB2416-OF

Nantucket Sinks Brightwork Home 24" Brass Bathroom Sink, TRB2416-OF

$1,012.43 $1,349.90

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Brightwork Home 18" Stainless Steel Bathroom Sink, OVS

Alternate Image for Nantucket Sinks Brightwork Home 18" Stainless Steel Bathroom Sink, OVS

Nantucket Sinks Brightwork Home 18" Stainless Steel Bathroom Sink, OVS

$487.49 $649.99

Low stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, GB-18x12-W

Alternate Image for Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, GB-18x12-W

Nantucket Sinks Great Point 21" Ceramic Bathroom Sink, White, GB-18x12-W

$228.00 $249.99

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Brightwork Home 13" Brass Bathroom Sink, ROB-OF

Alternate Image for Nantucket Sinks Brightwork Home 13" Brass Bathroom Sink, ROB-OF

Nantucket Sinks Brightwork Home 13" Brass Bathroom Sink, ROB-OF

$637.49 $849.99

In stock, ships in 1–2 days

Sale

Alternate Image for Nantucket Sinks Brightwork Home 17" Brass Bathroom Sink, RLB-OF

Alternate Image for Nantucket Sinks Brightwork Home 17" Brass Bathroom Sink, RLB-OF

Nantucket Sinks Brightwork Home 17" Brass Bathroom Sink, RLB-OF

$749.99 $999.99

In stock, ships in 1–2 days

Alternate Image for Nantucket Sinks Brightwork Home 20" Rectangle Undermount Stainless Steel Bathroom Sink, Silver, 18 Gauge, TRS-OF

Alternate Image for Nantucket Sinks Brightwork Home 20" Rectangle Undermount Stainless Steel Bathroom Sink, Silver, 18 Gauge, TRS-OF

Nantucket Sinks Brightwork Home 20" Rectangle Undermount Stainless Steel Bathroom Sink, Silver, 18 Gauge, TRS-OF

$599.99 $799.99

In stock, ships in 1–2 days

Sale

Alternate Image for Nantucket Sinks Brightwork Home 17" Stainless Steel Bathroom Sink, RLS-OF

Alternate Image for Nantucket Sinks Brightwork Home 17" Stainless Steel Bathroom Sink, RLS-OF

Nantucket Sinks Brightwork Home 17" Stainless Steel Bathroom Sink, RLS-OF

$787.49 $1,049.99

In stock, ships in 1–2 days

Page 1 / 2Next

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Return Policy

At The Sink Boutique, your satisfaction is our priority. We stand behind every product we sell and are here to ensure you're satisfied with your purchase.

What we promise:

Free replacements for damaged or incorrect items upon delivery
30-day return window for peace of mind with fair terms and fees
Personal support from real people — no bots, no runaround
Fast response within 1 business day

Need Help? We Are Here For You

Start here: Visit our Contact Us page and use our message form. Include your order number and photos if applicable. We’ll respond within 1 business day with the next steps.

Quick Links

Arrived Damaged or Wrong Item?
Missing Items?
Need to Cancel Your Order?
Product isn't quite Right for your space?
Exchanges
Important Details

Common Situations & Solutions

Arrived Damaged or Wrong Item?

We'll make it right at no cost to you:

Contact us within 48 hours of delivery. Report the damage here.
We'll arrange a free replacement immediately
Follow our Delivery Inspection Guidelines for the fastest resolution

Missing Items?

We'll investigate right away.

Report within 24 hours of delivery confirmation
We'll track down your missing item immediately

Need to Cancel Your Order?

We move fast, so call us ASAP. We work with multiple manufacturers who often process orders immediately.

Best option: Call (844) 470-1212 (Mon–Fri, 9–5 PM EST)
Email cancellation requests aren't guaranteed unless we confirm
In-stock items often move to shipping immediately, even after hours
Once manufacturers begin processing, cancellation becomes a standard return

Product Isn't Quite Right for Your Space?

We understand – finding the perfect fit can be tricky. Eligible items can be returned within 30 days. Here's how it works:

To qualify:

The item must be unused, uninstalled, and in original packaging
Return authorization is required (we'll provide clear instructions)
Return must be trackable and insured

Return fees apply:

Return shipping is the customer’s responsibility (varies by location and item size)
Manufacturer restocking fee (up to 25%) - this is an industry-standard fee charged by manufacturers, not The Sink Boutique, to cover the specialized handling these products require.

We'll confirm exact costs when you request your return authorization.

Exchanges

Exchanges are handled as a return + new purchase.
Simply return the original product (as above) and place a new order.

Important Details

Final Sale Items

Items marked "Final Sale" cannot be returned or exchanged per manufacturer policy, but we'll still replace them free if they arrive damaged.

Natural Variations

Our handcrafted sinks may have minor variations that make each piece unique. Small bubbles, dimples, or surface irregularities on unfinished undersides are normal characteristics of the artisan process and don't affect functionality.

Questions about your specific item? Contact us – we're happy to review it with you.

Color Matching

Colors may appear different due to monitor settings and natural material variations. Please review our Color Disclaimer before ordering.