33-Inch Unfinished Shaker Sink Base Cabinet
The USB33 is one of the most popular Unfinished Shaker Sink Base Cabinets for today's kitchens. Featuring two doors and a false drawer front, it provides the open interior needed for sink plumbing while maintaining the timeless appearance of a classic Shaker kitchen.
Unlike a standard base cabinet, a sink base cabinet is specifically designed to accommodate drain lines, water supply connections, garbage disposals, and other plumbing components while providing easy access for future maintenance.
Choosing the Right Sink Base Cabinet
One of the most common mistakes homeowners make is choosing a sink base cabinet based only on the outside dimensions of the sink.
The usable interior width of every cabinet is approximately 1.5 inches less than the listed cabinet width. Always verify the sink manufacturer's recommended minimum cabinet size before placing your order.
For drop-in sinks, the cabinet only needs to accommodate the portion of the sink below the countertop. Undermount sinks require additional clearance for mounting hardware, so always review the sink manufacturer's specifications before selecting a cabinet.
Why Choose a 33-Inch Sink Base Cabinet?
The USB33 is one of the most versatile sink base cabinet sizes available. It accommodates a wide variety of kitchen sinks while providing generous room for plumbing installation and future maintenance.
If your kitchen layout has room for a 33-inch sink base, it is an excellent choice for homeowners who want flexibility when selecting a sink without stepping up to a larger cabinet than necessary.
Common Applications
- Kitchens
- Kitchen islands with prep sinks
- Laundry rooms
- Mudrooms
- Utility rooms
- Prep kitchens
33-Inch vs. 30-Inch Sink Base Cabinet
The
30-Inch Unfinished Shaker Sink Base Cabinet
is an excellent choice when cabinet space is more limited or when the selected sink requires a smaller cabinet.
Choose the USB33 when your layout allows. The additional interior width provides more flexibility for sink selection while making plumbing installation and future service easier.
Built for Plumbing Access
The open sink base interior provides unobstructed space for drain lines, water supply connections, garbage disposals, and other plumbing components. The false drawer front preserves the appearance of a traditional base cabinet while allowing the sink and plumbing to occupy the space behind it.
Our two-door sink base cabinets are built without a center stile between the doors, providing full access to the cabinet interior during installation and making future plumbing repairs much easier.
Built to Last
Built in America, the USB33 features a premium solid maple face frame, solid maple Shaker doors with recessed maple plywood center panels, and a durable birch plywood cabinet box. Unlike many mass-produced cabinets, we build our cabinets using premium solid hardwood and durable plywood construction—never MDF, particleboard, or other engineered wood products—for long-term strength, durability, and dependable everyday performance.
Soft-close concealed hinges provide smooth, quiet operation. The unfinished maple exterior is ready for paint, stain, or clear coat, while the cabinet interior already includes a clear natural protective finish.
Before You Order
Before ordering, verify your cabinet layout, sink manufacturer's minimum cabinet requirement, plumbing location, countertop dimensions, neighboring cabinets, appliance clearances, and any required fillers.
Review our
How to Measure for Cabinets
guide before placing your order. We also recommend reading our
Cabinet Layout & Design Guide
to help avoid common planning mistakes before installation.
Browse our complete
Unfinished Shaker Sink Base Cabinet Collection
or our
Unfinished Shaker Cabinet Collection
to compare additional sink base cabinet sizes and configurations.
Product Specifications
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Model: USB33
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Width: 33 inches
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Height: 34.5 inches
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Depth: 24 inches
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Configuration: Two doors with one false drawer front
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Door Style: Partial Overlay Shaker
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Face Frame: Premium solid maple
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Doors: Solid maple with recessed maple plywood center panels
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Cabinet Box: Durable birch plywood
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Center Stile: None – full cabinet opening for easier plumbing access
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Construction: Premium all-wood construction – no MDF, particleboard, or engineered wood products
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Hardware: Soft-close concealed hinges
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Assembly: Ready-to-Assemble pocket screw construction
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Toe Kick: Individual toe kick included
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Origin: Made in America
Finishing Your Unfinished Maple Cabinet
The unfinished maple exterior can be painted, stained, or clear coated to coordinate with your kitchen. Maple can absorb stain unevenly, so proper preparation with a quality wood conditioner or sanding sealer is recommended before staining.
Before finishing your cabinet, review our
Cabinet Finishing Guide for Unfinished Maple Cabinets.
The cabinet interior already includes a clear natural protective finish and should not be painted or stained.
Assembly & Installation
The cabinet ships Ready-to-Assemble using our pocket screw construction system. The doors arrive pre-hung, and complete assembly instructions are included.
Visit our
Cabinet Learning Center
for assembly resources, installation guidance, and professional cabinet planning advice.
Professional Recommendation
The USB33 is one of the most versatile choices in our sink base cabinet lineup. It provides excellent flexibility for sink selection while leaving generous room for plumbing installation and future maintenance.
Before purchasing any sink base cabinet, always verify the sink manufacturer's minimum cabinet size requirements. Spending a few minutes confirming compatibility before ordering can prevent installation issues and help ensure your sink fits exactly as intended.
