Wholesale Undermount Bathroom Sinks for Multifamily & Commercial Projects

Wholesale undermount bathroom sinks install beneath the countertop, creating a continuous surface with no visible rim — requiring the polished interior cutout edge typical in stone, quartz, and solid surface vanity tops used in mid-tier and luxury unit packages. Developers, general contractors, and procurement teams source undermount across mid-tier multifamily, hospitality, senior living, and luxury residential; top mount (drop-in) is the value-tier alternative compatible with laminate vanity tops. Allora USA stocks undermount bathroom sinks in white porcelain oval and rectangular shapes, with ADA-compatible options in matched product families. Trade accounts coordinate premium-unit fixture packages, phased delivery, and documentation through the Allora Advantage program.

19 products
Sort by
Sort by
ADA COMPLIANT Allora USA 20" Shallow White Porcelain Undermount ADA Rectangular Bathroom Sink 20" Shallow White Porcelain Undermount ADA Rectangular Bathroom Sink
ADA-VCS-1218-R/S 20" Shallow White Porcelain Undermount ADA Rectangular Bathroom Sink

  • Size: 20" x 14-1/4" x 5"

downloadSpecification Sheet (PDF)
$99.00
ADA COMPLIANT Allora USA 21” x 15” Shallow ADA Undermount Vanity Sink: White Porcelain Restroom Lavatory 21” x 15” Shallow ADA Undermount Vanity Sink: White Porcelain Restroom Lavatory
ADA-VCS-1318-R/S 21” x 15” Shallow ADA Undermount Vanity Sink: White Porcelain Restroom Lavatory

  • Size: 20-1/2" x 15-1/4" x 5-3/8"

downloadSpecification Sheet (PDF)
$99.00
ADA COMPLIANT Allora USA 20" x 16" ADA-Depth White Oval Porcelain Undermount Bathroom Sink 20" x 16" ADA-Depth White Oval Porcelain Undermount Bathroom Sink
ADA-VCS-1417-O/S 20" x 16" ADA-Depth White Oval Porcelain Undermount Bathroom Sink

  • Size: 19-1/2" x 16" x 5-1/2"

downloadSpecification Sheet (PDF)
$94.00
20-3/4" White Rectangular Vitreous China Undermount Bathroom Sink with Overflow Drain 20-3/4" White Rectangular Vitreous China Undermount Bathroom Sink with Overflow Drain
VCS-1218-N-R/S 20-3/4" White Rectangular Vitreous China Undermount Bathroom Sink with Overflow Drain

  • Size: 20-5/8" x 14-3/8" x 7-1/2"

downloadSpecification Sheet (PDF)
$89.00
20-1/2" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White 20-1/2" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White
VCS-1318-R/S 20-1/2" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White

  • Size: 20-1/2" x 15-1/4" x 7-1/2"

downloadSpecification Sheet (PDF)
$99.00
Sold out
20-5/8" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White 20-5/8" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White
VCS-1218-R/S 20-5/8" Rectangular Porcelain Undermount Bathroom Sink with Overflow Drain in White

  • Size: 20-5/8" x 14-3/4" x 8-1/4"

downloadSpecification Sheet (PDF)
$94.00
18-1/2" Oval Porcelain Undermount Bathroom Sink with Overflow Drain in White 18-1/2" Oval Porcelain Undermount Bathroom Sink with Overflow Drain in White
VCS-1316-O/S 18-1/2" Oval Porcelain Undermount Bathroom Sink with Overflow Drain in White

  • Size: 18-1/4" x 15-1/4" x 7-1/2"

downloadSpecification Sheet (PDF)
$89.00
15" Oval Porcelain Undermount Bathroom Sink with Overlow Drain in White 15" Oval Porcelain Undermount Bathroom Sink with Overlow Drain in White
VCS-1013-O/S 15" Oval Porcelain Undermount Bathroom Sink with Overlow Drain in White

  • Size: 15" x 12-1/4" x 7-1/4"

downloadSpecification Sheet (PDF)
$89.00
17 x 13" Rectangular Porcelain Undermount Bathroom Sink with Overflow in White 17 x 13" Rectangular Porcelain Undermount Bathroom Sink with Overflow in White
VCS-1115-R/S 17 x 13" Rectangular Porcelain Undermount Bathroom Sink with Overflow in White

  • Size: 17-1/4" x 13-1/2" x 6-1/4"

downloadSpecification Sheet (PDF)
$114.00
Commercial & Multi-Unit

Undermount Bathroom Sinks for Fabricated Vanity Tops

Undermount bathroom sinks are installed below the countertop to create a continuous vanity surface. This mounting method is commonly specified for multifamily, hospitality, senior-living, and other projects using professionally fabricated stone or solid-surface tops.

Countertop fabrication is the defining project consideration. Verify the sink template, reveal preference, mounting hardware, counter material, bowl dimensions, faucet placement, and service access before the opening is cut.

Allora USA can review the specified undermount model with the fabricator's required reveal, counter material, vanity size, drain location, and mounting condition. If an alternate is considered, we provide model documents and identify differences that could require a new cutout, changed reveal, or revised plumbing position.

Request Project Pricing Send Allora the undermount sink schedule or specified model before fabrication for drawings, alternate comparison, availability, and project pricing.

Coordinate the Undermount Reveal

Specify whether the finished counter edge will use a positive, negative, or flush reveal. The approved detail should be consistent across fabricators and project phases.

Use the Exact Cutout Template

Similar undermount sinks can have different corner radii and flange dimensions. Fabricators should use the current drawing for the selected model, not a generic bathroom-sink template.

Confirm Countertop Compatibility

Review counter material, thickness, support, adhesive, clips, and mounting access. The sink must be coordinated as part of the fabricated vanity assembly.

Protect Faucet and Backsplash Space

The basin position affects the remaining deck area behind the sink. Confirm faucet-hole placement, handle movement, backsplash clearance, and drain alignment before fabrication.

Review Alternates Before Cutting Stone

Do not release an alternate undermount sink on outside dimensions alone. Compare the flange, corner radius, bowl outline, drain location, and cutout before fabrication.

Coordinate Project Pricing with Fabrication

Submit quantities before countertop production so model availability, pricing, and approved drawings can be aligned with each fabricator and project release.

Design Files and Resources for Professionals

TECHNICAL SPECIFICATIONS

At Allora USA, we provide a variety of 3D design files and resources tailored to streamline your specification journey. Our tools are designed to ensure that professionals like architects, designers, contractors, and engineers have everything they need to smoothly integrate Allora USA products into their projects.

Explore Technical Resources

Frequently Asked Questions

Undermount requires a polished interior cutout edge — works with stone, quartz, and solid surface vanity tops, not with laminate. Stone fabricators polish the edge during cutout. Verify vanity top spec supports undermount before finalizing the sink schedule.

Undermount is the mid-tier and luxury default — seamless counter-to-sink transition is part of the unit positioning, and the project budget includes stone or quartz vanity tops. Specify top mount for value-tier multifamily and student housing using laminate tops or budget-constrained installations.

White porcelain oval (transitional) and rectangular (contemporary). Both shapes are stocked in matched product families with their top mount counterparts to maintain consistent shape across install types within the project.

Yes. Allora produces ADA-supportive undermount bathroom sinks in matched product families with standard undermount — matched shape, finish, and external dimensions. The shallow-depth ADA basin meets accessibility requirements while maintaining the same vanity fit.

Spec sheets, cutout templates, BIM files, and DXF files are available for every SKU — cutout templates matter especially for undermount because fabricator cutout accuracy determines install quality. Trade accounts request the full documentation package through their Allora Advantage rep.

Stock orders ship same-day when placed before noon EST. Phased project orders are scheduled during spec stage — Allora Advantage members get tier pricing, dedicated rep support, hold-back inventory, and fabricator-direct delivery coordination on undermount specs.

Get Project Pricing for Wholesale Undermount Bathroom Sinks

One partner for every phase, from specification through final installation. Same-day quotes, volume pricing, in-stock inventory, and dedicated reps keep your project on budget and on schedule.

  • 01
    Same-Day Quotes
    Requests received by 2 p.m. ET on a business day are quoted the same day. Anything after 2 p.m. is quoted first thing the next business morning.
  • 02
    Volume Pricing That Scales with Your Project
    Pricing is tiered by unit count, so a 40-unit renovation and a 400-unit new build each get a rate that fits the job.
  • 03
    One Catalog, Stocked for the Whole Job
    Source every category in your spec from a single supplier with inventory depth for multifamily and commercial volumes. Finishes stay consistent across phases, there are no mid-project substitutions, and orders ship direct to your jobsite.
  • 04
    One Account Rep, Start to Finish
    A dedicated Allora USA representative owns your order end to end: product selection, spec sheets and submittal packages, order coordination, and installation questions.
Request Project Pricing
Share your fixture needs, estimated quantities, and delivery timeline. An Allora USA representative will follow up with project pricing, product availability, and shipping options. Still selecting products? Describe your project, and we’ll help you find the right fixtures.

WHAT OUR CUSTOMERS ARE RAVING ABOUT

We’ve partnered with Allora USA on several residential and commercial projects, and they consistently deliver top-notch products. The variety of styles and finishes they offer ensures that we find the perfect match for each project. What stands out is their attention to detail and quick turnaround times. We consider Allora USA an essential part of our supply chain.

Ryan - Project Manager, Multifamily Project Builder