Floor Plans

3 bedroom ADU floor plans

Discover our beautifully designed 3-bedroom ADU floor plans, uniquely optimized to blend spaciousness, modern comfort, and practical functionality. Each layout provides generous living areas, ensuring harmonious living for multi-generational families or versatile lifestyles.

Customize any design to suit your individual needs.

Adjustment options available for your perfect ADU.

In-house designers will adapt any layout to your exact requirements.

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360 sq.ft

1200 sq.ft

190000 $ 420000 $

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Customize any design to suit your individual needs.

Adjustment options available for your perfect ADU.

In-house designers will adapt any layout to your exact requirements.

No matching plans...

Let’s customize your dream ADU from scratch!
Custom Plan

Large Floor Plans 7 results

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Featured exterior rendering of the Mahogany 1200 sq ft ADU plans showcasing a stylish 3-bedroom, 2-bath design. 3D visualization of Mahogany 1200 sq ft ADU plans highlighting exterior elegance and modern architecture for a 3-bedroom, 2-bath layout.

Mahogany

From $420,000

1200

3 Bed

2 Bath

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Featured image showcasing Cypress 1192 sq ft, 4 bedroom ADU plans exterior design. 3D rendering of Cypress 1192 sq ft, 4 bedroom ADU plans with landscaped exterior view.

Cypress

From $420,000

1192

4 Bed

2 Bath

Torrey Pine

From $420,000

1192

3 Bed

2 Bath

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Exterior view of Sequoia 1020 sq ft, 3 Bedroom, 2 Bathroom ADU Plans with modern landscaping and lighting. 3D exterior rendering of Sequoia's 1020 sq ft, 3 Bedroom, 2 Bathroom ADU Plans highlighting the patio entrance and landscape design.

Sequoia

From $360,000

1020

3 Bed

2 Bath

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Exterior view of a modern white ADU with black trim – Featured Image - Mangrove - 1000 SQ FT, 2 Bedroom, 2 Bath – showcasing 2 bedroom 2 bath ADU plans. 3D rendering of a 1000 sq ft ADU with split-bedroom design – 3D - Mangrove - 1000 SQ FT, 2 Bedroom, 2 Bath – visualizing modern 2 bedroom 2 bath ADU plans.

Mangrove

From $350,000

1000

2 Bed

2 Bath

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Featured hero image of the Cottonwood 1000 sq ft ADU – modern exterior with black trim and entry walkway surrounded by greenery. 3D exterior rendering of Cottonwood 1000 sq ft ADU – modern 2 bedroom, 2 bath detached unit with black metal roofing and contemporary landscaping.

Cottonwood

From $350,000

1000

2 Bed

2 Bath

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Featured image of the Banyan 1000 sq ft ADU exterior showcasing modern landscaping and lighting – perfect for a stylish 3-bedroom, 2-bath layout. 3D rendering of the Banyan 1000 sq ft ADU highlighting architectural design and compact layout for a 3-bedroom, 2-bath configuration.

Banyan

From $350,000

1000

3 Bed

2 Bath

Medium Floor Plans 8 results

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Sumac

From $340,000

985

2 Bed

2 Bath

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Tamarind

From $330,000

950

2 Bed

2 Bath

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Sandalwood

From $315,000

900

2 Bed

2 Bath

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Pine

From $315,000

900

2 Bed

2 Bath

Cherry

From $310,000

880

2 Bed

2 Bath

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Mesquite

From $310,000

880

2 Bed

2 Bath

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Alder

From $300,000

800

2 Bed

2 Bath

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Maple

From $300,000

800

2 Bed

2 Bath

Small Floor Plans 8 results

Sycamore

From $280,000

749

1 Bed

1 Bath

Redwood

From $280,000

749

2 Bed

2 Bath

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Teak

From $280,000

749

2 Bed

2 Bath

Hickory

From $280,000

749

2 Bed

1 Bath

Almond

From $265,000

700

2 Bed

1 Bath

Acacia

From $265,000

700

2 Bed

2 Bath

Oak

From $260,000

650

2 Bed

1 Bath

Chestnut

From $260,000

600

1 Bed

1 Bath

Compact Floor Plans 12 results

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Cedar

From $230,000

550

1 Bed

1 Bath

Palm

From $220,000

500

1 Bed

1 Bath

Olive

From $220,000

500

1 Bed

1 Bath

Katsura

From $220,000

500

1 Bed

1 Bath

Aspen

From $220,000

500

1 Bed

1 Bath

Willow

From $210,000

440

1 Bed

1 Bath

Pecan

From $190,000

400

Studio

1 Bath

Fir

From $190,000

400

1 Bed

1 Bath

Birch

From $190,000

400

Studio

1 Bath

Elm

From $190,000

400

1 Bed

1 Bath

Balsa

From $190,000

400

1 Bed

1 Bath

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Bamboo

From $190,000

400

1 Bed

1 Bath

Property Value Boost

3 bedroom ADU floor plan sizes

3-bedroom ADUs offer the ultimate balance of space and functionality, making them perfect for families, multigenerational living, or rental opportunities. With the right design, these spacious units provide comfort, versatility, and lasting value.

3-bedroom ADUs typically range from 1,000 to 1,200 square feet to ensure all bedrooms are comfortably sized. While most ADUs max out at 1,200 square feet, some municipalities cap the size closer to 1,000 square feet. It's important to check your local regulations before starting construction. If navigating city ordinances feels overwhelming, a professional ADU builder can guide you through the process.

Two-story 3-bedroom ADUs are a popular option, especially for smaller lots. These designs allow you to maximize square footage while maintaining a compact footprint. For added convenience, many homeowners choose to place the master suite on the first floor for accessibility or all bedrooms upstairs to create a more traditional two-story home feel.

A 3-bedroom ADU offers plenty of room for customization. Add features like an extra bathroom, a laundry room, or outdoor living spaces such as patios or decks to suit your lifestyle. Whether you’re building for family use or rental income, these designs are flexible enough to meet your specific needs.

3-bedroom ADUs are a fantastic solution for families or adult children seeking an independent yet close living arrangement. With layouts that separate bedrooms from communal spaces, these designs offer privacy and comfort while feeling like a traditional home.

Building a 3-bedroom ADU is often more cost-effective than buying a larger home, especially in competitive housing markets like California. With thoughtful planning, these units can add significant value to your property, increase rental income potential, and provide a flexible space for years to come.

Adding a third bedroom significantly increases the appeal and value of your ADU. Larger units are ideal for families or groups of tenants, offering higher rental income potential. By maximizing your living space without sacrificing comfort, a 3-bedroom ADU delivers long-term returns on your investment.

Our custom-built ADUs

Big on space, functionality, and timeless design.

From multigenerational housing to rental income powerhouses, our 3-bedroom ADU projects are designed to maximize space, functionality, and value. These thoughtfully crafted layouts include open living areas, private bedrooms, and custom features tailored to your unique needs.

Find your perfect match

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3 Bedroom ADU Plans

Why choose a three-bedroom ADU floor plan?

A 3-bedroom ADU offers unparalleled versatility, value, and comfort. Whether you’re expanding for family, guests, or rental income, the extra space transforms your property into a flexible, future-proof investment.

More space, more possibilities

Use the extra room for a guest suite, office, or playroom.

Increased rental income

3-bedrooms attract families & groups, making it easier to rent.

Perfect for families

Private bedrooms & shared spaces make family living comfortable.

Multigenerational living

Great for parents or adult kids who need privacy and independence.

Property value boost

More space means a higher resale value & buyer appeal.

Flexible for the future

Rent it now, use it for family later—your ADU grows with you.

Your ADU: custom or pre-approved plans?

Designed for comfort

Custom 3-bedroom ADU plans give you the freedom to create a layout that suits your life. Need a master suite, private bathrooms, or a flexible room for an office or playroom? Custom designs tailor every square foot to your vision, ensuring a space that works for your family or rental goals.

Amplify property value

While pre-approved plans can fast-track the process, custom designs bring long-term value. A well-thought-out 3-bedroom ADU can include premium finishes, energy-efficient features, and unique layouts that maximize appeal to future buyers or tenants.

Fit for any lot

With a custom 3-bedroom ADU, your design adapts to your property. From making the most of a sloped yard to adding a second story for more privacy, custom plans align with your lot’s specific challenges and opportunities—while still meeting local zoning requirements.

What’s the ROI for
3-bedroom ADUs?

Discover how a 3-bedroom ADU outperforms other investments with higher rental income and increased property value. Our calculator highlights the unmatched ROI potential of larger layouts, especially in competitive markets.

$ Maximum value ranges from 1$ to 1000000$
$ Maximum value ranges from 1$ to 1000000$
Total Return on Your ADU Investment

1,739%

Compare to other investments:

Real Estate

Avg. 6-8%

Stocks

Avg. 5-7%

Savings Account

Avg. 2-4%

A tip from our designer...

decorative

Sarah

Interior Designer
"For your 3-bedroom ADU floor plan, our interior designer suggests thoughtfully arranging bedrooms—grouping them together for a cozy, family-friendly feel, or spacing them apart to ensure maximum privacy. Incorporate open-concept living areas paired with built-in storage solutions to enhance spaciousness and organization. Extending your living area outdoors by adding a patio or deck can make your ADU feel larger, more inviting, and functional. Lastly, design with flexibility in mind, allowing your space to adapt effortlessly to your evolving lifestyle needs."

Common 3-bedroom ADU layouts

3-bedroom ADUs offer the ultimate balance of space and functionality, making them perfect for families, multigenerational living, or rental opportunities. With the right design, these spacious units provide comfort, versatility, and lasting value for your property.

This compact ADU layout prioritizes efficiency without sacrificing comfort. The master bedroom includes a private en-suite bathroom, while the two smaller bedrooms share a central bathroom. An open floor plan connects the kitchen, dining, and living areas, creating a sense of spaciousness. This design is perfect for narrow lots or homeowners looking to maximize functionality in a smaller footprint.

This ADU layout is ideal for homeowners who want to provide a true, private master suite. The master bedroom not only contains a large en-suite bathroom with a linen closet and walk-in closet but it is also separated from the other two bedrooms by the ample living space.

Though only 20 square feet larger than the last ADU design, these architectural plans allocate the space much differently. With three bedrooms and two baths, this ADU floor plan's master bedroom contains an en-suite bathroom without the walk-in closet, and the third bedroom opens onto the private terrace. This layout makes an excellent choice as a potential rental unit, as the third bedroom can easily be utilized as a home office, yoga studio, or other flexible living space to accommodate the needs of a wide variety of renters.

Designed with renters in mind, this floor plan includes a large, open-concept living and dining area that flows seamlessly into the kitchen. The master bedroom features a private en-suite bathroom, while the other two bedrooms share a full bath. The third bedroom, located near the front entrance, can double as an office or creative workspace, making it ideal for professionals or small families.

This versatile ADU layout offers a balance of privacy and communal space. The master bedroom is tucked away at the back of the unit, complete with a walk-in closet and en-suite bathroom. The other two bedrooms share a bathroom and are located near the living area. The spacious kitchen includes a central island, perfect for entertaining or casual dining. A sliding door from the living room leads to a private outdoor patio, adding an extra layer of livability to the design.

Coming in at just under the maximum square footage of 1200 square feet for ADUs, this design plan mimics the layout of a traditional single-family ranch, with the living area and kitchen on one side and all 3 bedrooms on the other. This layout is common with homeowners who want to provide a place for their extended family, like their adult children and grandchildren, to live and create a true multigenerational family home.

Design. Build. Enjoy.

Building a 3-bedroom ADU is a breeze with our expert guidance. From personalized planning to high-quality construction, we manage every detail to deliver a spacious and versatile living space that suits your needs.

1

Discovery

Share your vision with us. Whether for multigenerational living, rental income, or extra space, we’ll assess your property and align your goals for the perfect fit.

2

Design

Collaborate with our experts to create a functional 3-bedroom layout. Optimize space, privacy, and features like outdoor areas, extra bathrooms, and smart storage.

3

Proposal

Receive a detailed proposal covering costs, timelines, and project specifics. From finishes to structural details, you’ll see your ADU’s full potential before construction begins.

4

Construction

With permits secured, we build your 3-bedroom ADU with precision. Our team ensures a high-quality space ready for family living, rental income, or long-term flexibility.

Must-know FAQs for 3-bedroom ADUs

Everything you need to know about 3-bedroom ADUs

A good 2-bedroom ADU has private bedrooms, open living spaces, lots of natural light, and smart storage. You can also add extras like a second bathroom or a patio to make it more functional.

Use an open floor plan, big windows, and light colors to make it feel roomy. Built-in storage and multi-use furniture, like a kitchen island with seating, can help maximize space.

Popular layouts include L-shaped designs for corner lots, rectangular plans for narrow spaces, or even two-story options if you’re short on land but need more room.

Absolutely. They’re great for renting to small families or roommates, and they also work well for multigenerational living, giving everyone their own space.

They usually range from 600 to 1,200 square feet. Smaller ones work well for tight lots, while larger ones can include extra features like a second bathroom or bigger kitchen.

Think about how you’ll use it—rental, family, or guests. Focus on natural light, privacy between bedrooms, and features that fit your lifestyle, like extra storage or outdoor access.

It depends on your lot size and goals. Open layouts work well for small spaces, while larger lots can fit more customized designs like two bathrooms or extra living areas.

1-bedroom ADU floor plans are perfect for singles or couples, offering compact layouts like studio ADU floor plans, often starting at 400–500 sq. ft. In contrast, 2-bedroom ADU floor plans provide more flexibility, accommodating small families or roommates with sizes ranging from 750 sq. ft. to 1,200 sq. ft. For even larger families, 3-bedroom ADUs or even 4-bedroom floor plans are ideal, often designed as 2-story ADUs or layouts above a garage to save space on smaller lots.

Yes, garage conversions are a popular choice for 2-bedroom ADUs. You can choose from narrow ADU plans to maximize a small footprint, or expand the garage to create a 750–1,000 sq. ft. unit. Floor plans to convert a 2-car garage into living space often feature an open-concept kitchen and living room, with bedrooms on opposite sides for privacy. For more room, consider ADU garage conversion plans with an additional floor above the garage.

For smaller lots, ADU floor plans of 500–750 sq. ft. offer smart layouts like granny flat floor plans or narrow designs that fit tight spaces. Mid-sized 2-bedroom plans, around 1,000 sq. ft., allow for extras like a second bathroom or a dedicated laundry room. Larger ADU floor plans, up to 1,200 sq. ft., can include 2-story ADU designs or features like an ADU above the garage, maximizing vertical space. Whether you’re working with small ADU floor plans or larger ones, each can be tailored to your needs.