21 ADU Bathroom Ideas That Prove Small Can Be Stunning

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Written by Omer Lewinsohn
Updated March 16, 202617 min read

The bathroom in an Accessory Dwelling Unit is a space where smart design can make a huge impact. While the footprint may be small, a well planned ADU bathroom can feel spacious, luxurious, and highly functional. The key is to choose fixtures, materials, and layouts that maximize every inch of space without sacrificing style.

The bathroom in an Accessory Dwelling Unit is a space where smart design can make a huge impact. While the footprint may be small, a well planned ADU bathroom can feel spacious, luxurious, and highly functional. The key is to choose fixtures, materials, and layouts that maximize every inch of space without sacrificing style. From walk in showers to floating vanities, there are countless ways to create a beautiful and efficient bathroom in your ADU.

We have scoured Pinterest to find the most inspiring and practical ADU bathroom ideas. Each of the following examples is a real bathroom from a real ADU project, showcasing clever solutions for small spaces. These designs prove that with a little creativity, you can have a bathroom that is both a joy to use and a beautiful addition to your ADU. Get ready to be inspired by these stunning examples of compact bathroom design.

1. Modern ADU Bathroom with Gold Fixtures

This beautiful ADU bathroom from Alloy Workshop features a clean and modern design with a touch of luxury. The white subway tiles in the shower create a timeless backdrop, while the gold fixtures add a touch of warmth and elegance. The glass enclosed shower with a built in bench is a great space saving solution that also adds a spa like feel. The small hexagonal tiles on the floor add a touch of modern style. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To achieve a similar look, consider using gold fixtures to add a touch of luxury to your ADU bathroom. A glass enclosed shower with a built in bench is a great way to save space and create a spa like atmosphere. Small hexagonal tiles are a popular choice for modern bathrooms and can add a touch of style. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

2. Modern Minimalist ADU Bathroom

This modern minimalist ADU bathroom from AP Remodeling Inc. is a great example of how to create a clean and serene space. The light colored tiles on the walls and floor create a bright and airy feel. The glass enclosed shower with a dark base adds a touch of modern style. The white toilet and the white rug on the floor in front of it complete the minimalist design. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To create a similar look, choose a neutral color palette and simple, clean lines. A glass enclosed shower is a great way to keep the space feeling open and airy. A dark shower base can add a touch of modern style and contrast. This bathroom is a great example of how to create a modern and minimalist space that is both beautiful and functional.

3. ADU Bathroom with Green Subway Tiles

This ADU bathroom from Cali ADU is a great example of how to use color to create a stylish and memorable space. The green subway tiles in the shower area add a pop of color and a touch of personality. The wooden vanity with a white sink adds warmth and a natural element to the design. The gold fixtures in the shower add a touch of luxury and complement the green tiles beautifully. This bathroom is a perfect example of how to create a unique and stylish space with a mix of colors and materials.

Do not be afraid to use color in your ADU bathroom. It can add personality and make a small space feel more special. Green is a great choice for a bathroom as it can create a calming and spa like atmosphere. Gold fixtures are a popular choice for modern bathrooms and can add a touch of luxury. This bathroom is a great example of how to create a stylish and memorable space with a bold use of color.

4. Neutral ADU Bathroom with Oval Mirror

This ADU bathroom from Rue Magazine is a great example of how to create a serene and stylish space with a neutral color palette. The light grey walls and the white fixtures create a bright and airy feel. The large oval mirror above the sink is a beautiful focal point. The woven basket on the floor next to the vanity adds a touch of natural texture and warmth. This bathroom is a perfect example of how to create a beautiful and functional space with a simple and elegant design.

To create a similar look, choose a neutral color palette and simple, clean lines. A large oval mirror can make a small bathroom feel larger and more open. A woven basket can add a touch of natural texture and warmth. This bathroom is a great example of how to create a modern and minimalist space that is both beautiful and functional.

5. Beach Style ADU Bathroom

This beach style ADU bathroom from Snap ADU is a great example of how to create a relaxed and inviting space. The white walls and the wood look flooring create a bright and airy feel. The bathtub with a shower is a great space saving solution for a small bathroom. The grey vanity with a white countertop and the toilet complete the functional and stylish design. The mirror above the vanity and the subtle decorative elements add a personal touch.

To create a similar look, choose a light and airy color palette. A bathtub with a shower is a great way to save space in a small bathroom. A grey vanity can add a touch of modern style. This bathroom is a great example of how to create a relaxed and inviting space with a beachy vibe.

6. Modern ADU Bathroom with Gold Fixtures and Built In Bench

This modern ADU bathroom is a great example of how to create a luxurious and functional space. The light gray walls and the white ceiling create a bright and airy feel. The shower with clear glass panels, a gold colored shower head, and a built in bench is a great space saving solution that also adds a spa like feel. The wooden vanity with a white countertop and the white toilet next to it complete the modern and stylish design. The framed botanical print on the wall adds a touch of nature and a personal touch.

To create a similar look, consider using gold fixtures to add a touch of luxury to your ADU bathroom. A shower with a built in bench is a great way to create a spa like atmosphere. A wooden vanity can add warmth and a natural element to the design. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

7. Modern ADU Bathroom with Walk In Shower

This modern ADU bathroom is a great example of how to create a clean and minimalist space. The light colored tiles on the walls and floor create a bright and airy feel. The glass enclosed shower area and the simple vanity with a mirror complete the modern and functional design. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To create a similar look, choose a neutral color palette and simple, clean lines. A glass enclosed shower is a great way to keep the space feeling open and airy. A simple vanity with a mirror is a great space saving solution. This bathroom is a great example of how to create a modern and minimalist space that is both beautiful and functional.

8. Bright ADU Bathroom with Natural Light

This bright ADU bathroom from Sogno Design Group is a great example of how to use natural light to make a space feel larger. The light colored rectangular tiles on the shower walls and the clear glass enclosure create a bright and airy feel. The small wooden stool in the shower adds a touch of warmth and a natural element to the design. The window provides natural light, which can make a small bathroom feel larger and more open. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

If you have the opportunity to add a window to your ADU bathroom, do it! Natural light can make a huge difference in a small space. A glass enclosed shower is a great way to let that light flow through the room. A small wooden stool can add a touch of warmth and a spa like feel. This bathroom is a great example of how to create a bright and functional space with a classic design.

9. Modern ADU Bathroom with Gold Fixtures

This modern ADU bathroom from Lexi Grace Design is a great example of how to create a luxurious and functional space. The walk in shower with clear glass doors and white subway tiles on the walls is a great space saving solution. The gold toned fixtures, including a showerhead and handle, add a touch of warmth and elegance. The white woven basket on the light tiled floor adds a touch of natural texture and warmth. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To create a similar look, consider using gold fixtures to add a touch of luxury to your ADU bathroom. A walk in shower with clear glass doors is a great way to keep the space feeling open and airy. A white woven basket can add a touch of natural texture and warmth. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

10. Modern ADU Bathroom with Shiplap Walls

This modern ADU bathroom from Misti Ellis is a great example of how to create a cozy and inviting space. The light colored shiplap walls add a touch of rustic charm, while the wooden vanity with a white countertop and a black faucet adds a modern and industrial touch. The round mirror above the vanity is a beautiful focal point. The light colored tile flooring keeps the space feeling bright and open. This bathroom is a perfect example of how to create a unique and stylish space by blending different design styles.

To create a similar look, consider using shiplap on the walls to add a touch of rustic charm. A wooden vanity can add warmth and a natural element to the design. A round mirror can make a small bathroom feel larger and more open. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

11. Bright ADU Bathroom with Natural Light and Open Shelving

This bright ADU bathroom from Dwell is a great example of how to use natural light and open shelving to create a spacious and functional space. The large window provides natural light, which can make a small bathroom feel larger and more open. The white countertop with an integrated sink and a stylish gold toned faucet adds a touch of luxury. The open wooden shelves below the counter are neatly stacked with white towels, contributing to a clean and minimalist aesthetic. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

If you have the opportunity to add a large window to your ADU bathroom, do it! Natural light can make a huge difference in a small space. Open shelving is a great way to add storage without making a small bathroom feel cluttered. A gold toned faucet can add a touch of luxury and elegance. This bathroom is a great example of how to create a bright and functional space with a classic design.

12. Modern ADU Bathroom with Hexagonal Floor Tiles

This modern ADU bathroom from INSTILE design build is a great example of how to use tile to create a stylish and functional space. The dark hexagonal tiled floor adds a touch of modern style, while the white subway tiles on the walls create a clean and timeless backdrop. The wall mounted toilet and the floating wooden vanity with a white rectangular sink are great space saving solutions. The walk in shower with a glass partition keeps the space feeling open and airy. The wooden shelves above the toilet provide additional storage. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To create a similar look, consider using hexagonal tiles on the floor to add a touch of modern style. A wall mounted toilet and a floating vanity are great ways to save space and make a small bathroom feel larger. A walk in shower with a glass partition is a great way to keep the space feeling open and airy. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

13. Modern ADU Bathroom with Wood Look Shower Tiles

This modern ADU bathroom from Cotta.ge is a great example of how to create a warm and inviting space. The wood look shower tiles and the herringbone feature wall add a touch of rustic charm, while the glass enclosed shower with a wooden bench adds a spa like feel. The round mirror and the black fixtures provide a modern and sophisticated contrast. The soft lighting and the tactile surfaces create a cozy and compact sanctuary. This bathroom is a perfect example of how to create a unique and stylish space by blending different design styles.

To create a similar look, consider using wood look tiles in the shower to add a touch of warmth and a natural element to the design. A herringbone feature wall can add a touch of modern style. A glass enclosed shower with a wooden bench is a great way to create a spa like atmosphere. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

14. Modern ADU Bathroom with Double Vanity

This modern ADU bathroom from Nestadu is a great example of how to create a spacious and functional space. The light colored tiles on the walls and floor create a bright and airy feel. The large double vanity with a white countertop and two sinks is a great feature for a family or a couple. The glass enclosed shower and the white toilet complete the modern and stylish design. The window provides natural light, which can make a small bathroom feel larger and more open. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

If you have the space, a double vanity is a great feature to include in your ADU bathroom. It can make the space feel more luxurious and functional. A glass enclosed shower is a great way to keep the space feeling open and airy. A window in the bathroom can make a huge difference, making it feel larger and more open. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

15. Modern ADU Bathroom with Black Fixtures

This modern ADU bathroom from Dacotah Studio is a great example of how to use black fixtures to create a stylish and sophisticated space. The white toilet and the dark wood vanity with a white countertop and a black faucet create a beautiful contrast. The rectangular mirror with a black frame above the vanity is a great focal point. The shower area has clear glass partitions and a black showerhead. The light colored walls and the window above the toilet keep the space feeling bright and open. This bathroom is a perfect example of how to create a modern and stylish space that is both beautiful and functional.

To create a similar look, consider using black fixtures to add a touch of modern style and sophistication to your ADU bathroom. A dark wood vanity can add warmth and a natural element to the design. A rectangular mirror with a black frame can be a great focal point. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

16. Modern ADU Bathroom with Bathtub

This modern ADU bathroom from Cotta.ge is a great example of how to include a bathtub in a small space. The light colored, homogeneous tiles throughout the bathroom create a bright and spacious feel. The white bathtub, the toilet, and the wooden vanity with a white sink and a large rectangular mirror complete the modern and functional design. The shower area is enclosed with glass walls, which contributes to a spacious and bright aesthetic. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

If you want to include a bathtub in your ADU bathroom, choose a compact model and use light colored tiles to make the space feel larger. A glass shower enclosure can also help to keep the space feeling open and airy. A wooden vanity can add warmth and a natural element to the design. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

17. Modern Scandinavian Style ADU Bathroom

This modern Scandinavian style ADU bathroom from apartmentabc.com is a great example of how to create a bright and minimalist space. The white subway tiles on the walls, the floating toilet, and the wall mounted sink with a light wood vanity create a clean and contemporary look. The glass shower enclosure with a black frame adds a touch of modern style. The color palette is predominantly white and light wood, which contributes to a bright and minimalist aesthetic. This bathroom is a perfect example of how to create a beautiful and functional space in a small footprint.

To create a similar look, choose a light and airy color palette. A floating toilet and a wall mounted sink are great ways to save space and make a small bathroom feel larger. A glass shower enclosure with a black frame can add a touch of modern style. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

18. Modern ADU Bathroom with Floating Vanity

This modern ADU bathroom from decorcrowd.com is a great example of how to create a stylish and functional space. The light wood floating vanity with a white rectangular sink and a black framed rectangular mirror is a beautiful focal point. The light colored walls and the glass enclosed shower with light tiles keep the space feeling bright and open. The small plant adds a touch of greenery to the neutral color palette. This bathroom is a perfect example of how to create a modern and minimalist space that is both beautiful and functional.

To create a similar look, choose a light and airy color palette. A floating vanity is a great way to save space and make a small bathroom feel larger. A black framed mirror can be a great focal point. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

19. Modern ADU Bathroom with Walk In Shower and Round Mirror

This modern ADU bathroom from apartmentabc.com is a great example of how to create a stylish and functional space. The walk in shower with a glass panel and white subway tiles is a great space saving solution. The light wood vanity with a white countertop and a large, simple round mirror above it adds warmth and functionality to the small space. The small potted plants add a touch of color and life to the space. This bathroom is a perfect example of how to create a modern and minimalist space that is both beautiful and functional.

To create a similar look, choose a light and airy color palette. A walk in shower with a glass panel is a great way to keep the space feeling open and airy. A large round mirror can make a small bathroom feel larger and more open. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

20. Modern ADU Bathroom with Dark Grey Vanity

This modern ADU bathroom from tripleheartspaces.com is a great example of how to create a stylish and sophisticated space. The light colored walls and the light grey tiled floor create a bright and airy feel. The walk in shower with a clear glass panel and black fixtures is a great space saving solution. The white toilet is positioned adjacent to the shower. The dark grey vanity with a white rectangular sink and a round mirror completes the minimalist design. This bathroom is a perfect example of how to create a modern and stylish space that is both beautiful and functional.

To create a similar look, consider using a dark grey vanity to add a touch of modern style and sophistication to your ADU bathroom. A walk in shower with a clear glass panel is a great way to keep the space feeling open and airy. Black fixtures are a popular choice for modern bathrooms and can add a touch of sophistication. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

21. Modern ADU Bathroom with Dark Gray Walls

This modern ADU bathroom from New Avenue is a great example of how to use a dark color to create a cozy and inviting space. The dark gray or blue gray walls create a dramatic and sophisticated look. The white subway tiles in the walk in shower and the white hexagonal tile floor provide a beautiful contrast. The light colored wooden vanity with a white sink and a round mirror adds warmth and a natural element to the design. This bathroom is a perfect example of how to create a unique and stylish space by blending different design styles.

Do not be afraid to use a dark color in your ADU bathroom. It can create a cozy and inviting atmosphere. White subway tiles and hexagonal tiles are classic choices that can provide a beautiful contrast to a dark wall color. A wooden vanity can add warmth and a natural element to the design. This bathroom is a great example of how to create a modern and stylish space that is both beautiful and functional.

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