What Is a Knee Drawer? Vanity Sizes, Uses & Design Guide

A knee drawer is a specialized vanity cabinet component designed to add storage while creating comfortable open space underneath a bathroom countertop. Knee drawers are commonly used in bathroom vanity layouts, makeup areas, and custom vanity designs where both function and seating space are important.

Unlike a standard vanity drawer, a knee drawer is typically installed above an open knee space, allowing a person to sit comfortably while still having convenient storage within reach. This design can help create a more flexible and functional bathroom vanity layout.

What Is a Knee Drawer?

A knee drawer is a small, shallow drawer cabinet installed in an open section of a vanity design. The name comes from the open area underneath the countertop where a person’s knees can fit while sitting.

In a typical bathroom vanity layout, a knee drawer may be placed between two larger vanity cabinets to create a functional center section. This design keeps the countertop continuous while adding storage for smaller bathroom items such as makeup, toiletries, grooming tools, and daily essentials.

Common features of a knee drawer include:

• Shallow drawer depth compared with standard base cabinets
• Compact width options for flexible vanity layouts
• Storage space positioned above an open knee area
• Compatibility with bathroom vanity and makeup vanity designs

Because knee drawers combine storage with an open seating area, they are different from traditional vanity drawer bases. They are mainly used when the goal is to create a more comfortable and flexible vanity workspace.

Where Are Knee Drawers Used?

Knee drawers are most commonly used in vanity layouts where a combination of storage and open workspace is needed. Because they create a recessed area under the countertop, they are especially useful in designs where someone may need to sit while using the space.

Bathroom Vanity Knee Drawers

In bathroom vanities, knee drawers are often placed between two cabinet sections or below a countertop area. They provide convenient storage while maintaining an open section for comfortable use.

A bathroom vanity knee drawer can store smaller everyday items such as:

• Makeup products
• Hair styling tools
• Personal care items
• Small bathroom accessories

This layout is especially useful for larger vanity designs where a continuous countertop spans multiple cabinet sections.

Knee drawers are commonly used as part of larger bathroom vanity configurations. Explore our bathroom vanity cabinets for more cabinet combinations and layouts.

Makeup Vanity Areas

Knee drawers are also commonly used in makeup vanity designs. The open space allows a chair or stool to fit underneath the countertop, creating a dedicated area for sitting while getting ready.

Compared with a standard cabinet base, a knee drawer setup provides a more furniture-like appearance while still adding practical storage.

Accessible Vanity Designs

Knee drawers can also support more accessible bathroom layouts by creating additional legroom beneath the countertop. The open area can make the vanity more comfortable to use while keeping essential storage within easy reach.

When planning a knee drawer layout, the available width, countertop height, and surrounding cabinet configuration should all be considered to ensure the final design remains functional.

Common Knee Drawer Sizes

Knee drawer sizes can vary depending on the vanity layout, available wall space, countertop design, and the amount of storage needed. Unlike standard base cabinets, knee drawers are often used as a flexible component that connects larger cabinet sections.

Common knee drawer dimensions include:

Knee Drawer Width

Common widths for knee drawers include:

• 18 inches
• 24 inches
• 30 inches
• 36 inches

The right width depends on the overall vanity layout. Smaller widths can work well in compact bathroom spaces, while wider knee drawers are often used in larger double vanity designs.

Knee Drawer Height

Knee drawers are usually shorter than standard vanity base cabinets because they are designed to sit above an open knee space.

Common height considerations include:

• A drawer height that provides useful storage without making the vanity feel bulky
• Enough open space below the countertop for comfortable seating
• Alignment with the surrounding vanity cabinet layout

The exact height may vary depending on countertop thickness, vanity style, and the intended use of the open area.

Knee Drawer Depth

Most knee drawers are designed around the same general depth as the surrounding vanity cabinets so the countertop can remain continuous.

Depth considerations include:

• Matching the depth of connected vanity cabinets
• Providing enough room for everyday bathroom items
• Maintaining comfortable legroom underneath

When planning a knee drawer, the overall vanity design should be considered first. The drawer size should support the function of the space rather than being selected separately from the rest of the cabinet layout.

For a ready-to-install example, see our Noble Honey Wheat Shaker Vanity Knee Drawer featuring a 30-inch width and knee drawer design.

Knee Drawer vs Regular Vanity Drawer

Although both knee drawers and regular vanity drawers provide bathroom storage, they serve different purposes in a cabinet layout.

A regular vanity drawer is part of a standard vanity cabinet base and is primarily designed to maximize storage. It is usually installed within a full cabinet section and works as a traditional storage component.

A knee drawer is designed around an open vanity area. Instead of filling the entire space with cabinet boxes, it creates a combination of storage and open legroom beneath the countertop.

A knee drawer is usually chosen when the vanity design needs both functionality and openness. A regular vanity drawer is often preferred when maximizing enclosed storage is the main goal.

The right option depends on the overall bathroom layout, available space, and how the vanity will be used.

Benefits of Adding a Knee Drawer

A knee drawer can improve a vanity layout by combining practical storage with a more flexible countertop design. Instead of using every section of the vanity for closed cabinetry, a knee drawer allows part of the space to remain open while still providing useful storage.

Creates a Comfortable Seating Area

One of the main benefits of a knee drawer is the open space it creates underneath the countertop. This allows a chair or stool to fit comfortably, making the vanity easier to use while sitting.

This is especially useful for:

• Makeup areas
• Grooming spaces
• Bathroom vanities designed for daily routines

Adds Storage Without Closing the Entire Vanity

A knee drawer provides additional storage while maintaining an open vanity section. It can store smaller items that are frequently used, helping keep the countertop cleaner and more organized.

Creates a More Custom Vanity Appearance

Compared with a fully cabinet-filled vanity, a knee drawer layout can create a more furniture-style appearance. The combination of closed storage and open space can make a larger vanity feel more balanced and intentional.

Improves Vanity Layout Flexibility

Knee drawers are useful when designing custom vanity configurations because they can connect multiple cabinet sections while keeping the countertop layout continuous.

For homeowners planning a larger bathroom vanity, a knee drawer can be a practical way to combine storage, comfort, and visual balance in one design.

How to Plan a Bathroom Vanity With a Knee Drawer

Planning a bathroom vanity with a knee drawer requires considering the relationship between storage, countertop space, and the open area underneath. A knee drawer should be treated as part of the complete vanity layout rather than a separate cabinet component.

Determine the Available Vanity Space

Before adding a knee drawer, measure the available wall space and consider how the vanity will be arranged. The total width needs to accommodate surrounding cabinets, the knee drawer section, sinks, and any required clearances.

Before planning a knee drawer layout, understanding the correct vanity dimensions and available space is an important step. Learn more about choosing the right bathroom vanity size.

Choose the Right Knee Drawer Location

Knee drawers are commonly placed:

• Between two vanity cabinet sections
• Next to a sink base cabinet
• In a dedicated makeup or seated vanity area

The location should allow comfortable use while maintaining a balanced cabinet layout.

Coordinate With the Countertop Design

Because knee drawers are usually installed below a continuous countertop, the countertop dimensions should be planned together with the cabinet arrangement.

Important considerations include:

• Countertop support around the open knee space
• Alignment with surrounding cabinet boxes
• Comfortable height for seated use

Match the Knee Drawer With Surrounding Cabinets

A knee drawer usually works best when its cabinet style, finish, and hardware match the rest of the vanity. This creates a unified appearance while allowing the open section to feel intentional.

When planning a vanity with a knee drawer, the goal is to create a balance between accessible storage and comfortable workspace rather than simply adding another cabinet section.

Knee Drawer vs Makeup Vanity Area

A knee drawer and a makeup vanity area can look similar because both designs create a comfortable seated space, but they serve different purposes.

A knee drawer is a cabinet component designed to add storage within a bathroom vanity layout. It typically includes a shallow drawer above an open knee space, allowing homeowners to sit comfortably while keeping everyday items nearby.

A makeup vanity area is usually a larger dedicated space designed specifically for grooming routines. It may include a wider countertop area, additional lighting, and more open workspace.

Key Differences

For homeowners planning a bathroom vanity, a knee drawer can be a practical solution when they want the convenience of a seated area without creating a separate makeup station.

Are Knee Drawers Right for Every Bathroom?

Knee drawers can be a useful addition to many bathroom vanity layouts, but they are not the right choice for every space. The best option depends on how the vanity will be used, the available room, and the amount of storage needed.

A knee drawer may be a good choice when:

• A seated vanity area is desired
• The bathroom has enough width for a larger vanity layout
• A combination of open space and storage is preferred
• The homeowner wants a more furniture-style vanity appearance

A traditional vanity cabinet may be a better option when:

• Maximum enclosed storage is the priority
• The available bathroom space is limited
• The vanity is mainly used for general daily storage
• There is no need for a seated workspace

Knee drawers are most valuable when they solve a specific layout need. They are not simply a replacement for standard drawers, but rather a design option that combines storage with an open vanity area.

Before choosing a knee drawer layout, consider the overall bathroom function, available space, and how the vanity will be used every day.

FAQ About Knee Drawers

What is a knee drawer?

A knee drawer is a shallow drawer cabinet designed to fit above an open knee space in a vanity layout. It provides additional storage while allowing room for a chair, stool, or comfortable seated use underneath the countertop.

What size is a typical knee drawer?

Knee drawer sizes vary depending on the vanity layout, but common widths include 18, 24, 30, and 36 inches. The final size depends on the available space, surrounding cabinets, and countertop design.

Where are knee drawers commonly used?

Knee drawers are commonly used in bathroom vanities, makeup vanity areas, and seated vanity designs. They are often installed between larger cabinet sections to combine storage with an open workspace.

Can a knee drawer be added to any bathroom vanity?

Not every vanity layout is suitable for a knee drawer. The available width, cabinet arrangement, countertop support, and intended use of the vanity should all be considered before adding one.

Are knee drawers only used for bathrooms?

Although knee drawers are most common in bathroom vanities, similar designs can also be used in other built-in areas where storage and a seated workspace are combined.

Can a knee drawer be added to an existing vanity?

Adding a knee drawer to an existing vanity depends on the cabinet construction, available space, countertop support, and overall vanity layout.

In many cases, knee drawers are planned as part of a new vanity configuration because the open knee space needs to be coordinated with surrounding cabinets and the countertop. For existing bathrooms, modifications may require adjusting cabinet sections or replacing part of the vanity layout.

Before adding a knee drawer, measure the available space and consider how the new cabinet component will work with the existing vanity structure.

Final Thoughts

A knee drawer is a practical cabinet component that combines storage with an open vanity area. Unlike a traditional vanity drawer, it is designed to support layouts where comfort, workspace, and storage need to work together.

Whether used in a bathroom vanity, makeup area, or custom built-in design, a knee drawer can create a more flexible and functional space when planned correctly. The right size and placement depend on the available room, surrounding cabinets, countertop design, and how the vanity will be used.

Before choosing a knee drawer layout, consider the overall purpose of the space and how the cabinet configuration will support daily use.