ADU House Plans (450–800 Sq. Ft.) – Smart, Compact Living with Big Possibilities

Explore affordable ADU floor plans perfect for backyard units, guest suites, rental cottages, in-law spaces, and flexible small-home living.

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Found 2,712 House Plans!

  • Front elevation of a New American Modern Traditional house with lap siding, stone accents, symmetrical windows, and a covered entry porch

    Plan 11-2078 – Fern Brook Cottage | New American – 3-Bed, 4.5-Bath, 3,143 SF – House plan details
  • Front elevation of a large Traditional Colonial home with stone, lap siding, board and batten gables, and three-car garage

    Plan 8-1930-5 – The White Haven | Traditional Colonial Townhome – 2-Bed, 2-Bath, 1,965 SF – House plan details
  • Front elevation of a Coastal Traditional style elevated home featuring shingle siding, stone base, symmetrical windows, and dual garage bays

    Plan 18-1513 – Brown Lodge | Coastal Traditional – 4-Bed, 5-Bath, 4,323 SF – House plan details
  • Front elevation of a Traditional Georgian Colonial style home featuring full brick exterior, symmetrical windows, black shutters, and centered columned entry

    Plan 15-1426 – Laurel Valley Cabin | Georgian Colonial – 5-Bed, 5-Bath, 5,916 SF – House plan details
  • Front elevation of a Traditional Ranch style home featuring white horizontal siding, brick foundation, covered porch, and single-car garage

    Plan 10-1374 – Eliza | Traditional Ranch – 3-Bed, 2-Bath, 1,254 SF – House plan details
  • Front view of a Modern Farmhouse style two-story home featuring board and batten with horizontal siding, brick base accents, and a single-car garage

    Plan 19-1759 – Barnes Ridge | Modern Farmhouse – 3-Bed, 2.5-Bath, 1,577 SF – House plan details
  • Front view of a Traditional Suburban Ranch style home featuring vinyl siding, stone skirting, shuttered windows, and a covered porch

    Plan 15-1901 – Martin Crossing | Traditional Suburban – 3-Bed, 2-Bath, 1,130 SF – House plan details
  • Front elevation of Traditional Ranch style home with white horizontal lap siding, symmetrical windows, and a covered entry porch

    Plan 15-1784B – Taylor Walk | Traditional Ranch Duplex – 3-Bed, 2-Bath, 2,838 SF – House plan details
  • Front elevation of a modern cottage style home featuring horizontal siding, stone accents, large glass doors, and warm illuminated windows

    Plan 18-2158 – Wright Place | Cottage Pool House – 2-Bed, 2-Bath, 1,150 SF – House plan details
  • Front elevation of a Traditional Transitional style home featuring a stone and horizontal siding exterior, dark shingle roof, and red window shutters.

    Plan 10-1396 – The Wilfred | Traditional – 3-Bed, 2.5-Bath, 2,248 SF – House plan details
  • Front elevation of a Modern Farmhouse style home featuring board and batten siding, stone accents, gabled rooflines, and a double garage

    Plan 10-1842 – Wilshire | Modern Farmhouse – 4-Bed, 3.5-Bath, 2,568 SF – House plan details
  • Front exterior of a Traditional Colonial style home with brick facade, dormer windows, black shutters, and attached two-car garage

    Plan 8-1394 – Sanders Ridge | Traditional Colonial – 4-Bed, 4-Bath, 1,563 SF – House plan details
  • Front view of Modern Farmhouse style home featuring board and batten siding, brick base, gable detailing, and covered front porch with black accents

    Plan 20-1044 – Walker Crossing | Modern Farmhouse – 3-Bed, 2.5-Bath, 1,962 SF – House plan details
  • Front view of a Traditional Colonial style home featuring board and batten siding, horizontal lap siding, and stone detailing with a symmetrical two-story façade.

    Plan 15-1983 – Hall Ridge | Traditional Colonial Duplex – 5-Bed, 4.5-Bath, 2,634 SF – House plan details
  • Front elevation of a Coastal Cottage style garage apartment with Cape Cod rooflines, blue horizontal siding, stone base accents, and decorative shutters

    Plan 19-1742 – The Price Haven | Coastal Cottage RV Garage – 0-Bed, 0-Bath, 900 SF – House plan details
  • Front elevation of a Cape Cod and Traditional Cottage style home featuring lap siding, dormers, front porch columns, and timeless symmetrical design

    Plan 10-1220 – The Shirley | Cape Cod – 3-Bed, 2-Bath, 2,123 SF – House plan details
  • Front elevation of New American modern traditional house with white horizontal siding, brick accents, gabled roof, and covered front porch

    Plan 11-1194 – Bitteroot | New American – 4-Bed, 3.5-Bath, 2,245 SF – House plan details
  • Front elevation of a Modern Farmhouse style home with white horizontal siding, black garage door, and stone-accented porch columns

    Plan 16-1523 – The Brooks Manor | Modern Farmhouse – 4-Bed, 3-Bath, 2,372 SF – House plan details
  • Architectural House Blueprint - 4-Unit Townhouse Floor Plan Designs

    Plan 11-1773 – Chestnut Grove Manor | Modern Farmhouse Townhome – 3-Bed, 2-Bath, 6,124 SF – House plan details
  • Front view of a Traditional Ranch style home featuring gray horizontal lap siding, stone accents, and a two-car garage under a symmetrical gable roofline

    Plan 8-1278 – The Cook Station | Traditional Ranch – 3-Bed, 3-Bath, 1,805 SF – House plan details
  • Front view of a Traditional Craftsman style home featuring gray lap and shingle siding, brick base columns, and a welcoming front porch with white trim details.

    Plan 12-2802 – Fern Hill Residence | Traditional Craftsman – 4-Bed, 2.5-Bath, 2,470 SF – House plan details
  • Front elevation of an elevated Coastal Low Country house with horizontal lap siding, double stacked porches, a drive-under garage, and a tower-style corner massing

    Plan 13-MANN – Yew Tree Valley Estate | Coastal – 5-Bed, 5-Bath, 3,402 SF – House plan details
  • 2 Story Modern Craftsman House Plan 4 Bed 3 Bath 2600 Sq Ft 1

    Plan 10-1260 – Tennessee Farmhouse | Modern Craftsman – 4-Bed, 3.5-Bath, 2,510 SF – House plan details
  • Front elevation of a Traditional Ranch style home with stone veneer, horizontal lap siding, symmetrical windows, and landscaped front yard

    Plan 8-1684 – Flores Ridge | Traditional Ranch – 4-Bed, 3.5-Bath, 2,424 SF – House plan details
  • Front elevation of Charleston-style Southern home featuring stone foundation, horizontal siding, and double stacked porches with symmetrical design

    Plan 12-2102 – Linden Run Manor | Charleston – 3-Bed, 2-Bath, 3,174 SF – House plan details
ADU House Plans

ADU House Plans – Smart, Stylish, and Perfect for Compact Living

If you’re looking for a smart way to expand your living space, generate rental income, or create a private guest suite, our collection of ADU house plans is the perfect place to start. Also known as Accessory Dwelling Units, these compact designs are ideal for backyard cottages, in-law suites, guest houses, home offices, tiny rentals, or flexible small-home living.

Modern ADU house plan with compact backyard living design

What Is an ADU?

ADU stands for Accessory Dwelling Unit. It is a smaller, self-contained residential structure located on the same property as a primary home. ADUs are commonly used as backyard rental units, private guest cottages, in-law suites, compact home offices with living space, or short-term vacation rentals where local rules allow.

Designed for Smart, Compact Living

ADU house plans make it possible to add valuable living space without building a full-size home. These efficient layouts are designed to make every square foot count while still offering privacy, comfort, storage, and everyday functionality.

1

Backyard Rental Potential

Create an income-producing rental unit, long-term tenant space, or short-term stay option where local zoning allows ADU use.

2

Guest or In-Law Suite

Give family members, aging parents, adult children, or guests a private living space close to the main home but still independent.

3

Efficient Small Footprints

Compact layouts combine living, dining, kitchen, bedroom, bathroom, and storage needs into a smaller, smarter residential design.

4

Flexible Property Value

An ADU can add usable square footage, improve property flexibility, and create more options for changing family or investment needs.

Premium Plan Features Included With Every ADU Design

Every ADU house plan includes editable CAD files and printable PDFs, giving you more control when working with builders, designers, engineers, or local permitting offices. These compact plan packages are built for flexibility from the start.

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CAD & PDF Files

Your ADU plan package includes editable CAD files and printable PDFs, making it easier to customize the design for your site and local requirements.

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Unlimited Build License

Use your ADU plan more than once without paying for a new license every time, especially useful for builders, investors, and repeat projects.

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Engineering Included

Structural engineering is included to help support a smoother path toward construction and give your builder a stronger plan package to work from.

These extras can save you thousands compared to competitors who charge separately for CAD files, additional builds, foundation changes, or engineering.

Learn more about our included CAD files, unlimited-build license, free foundation modifications, and structural engineering.

Who Are ADU House Plans Perfect For?

ADU house plans are popular with homeowners, families, investors, and builders who want a compact design that can serve many different purposes. From rental income to multigenerational living, ADUs offer big possibilities in a smaller footprint.

  • Homeowners with extra backyard space who want a guest cottage, rental unit, studio, office, or private retreat.
  • Families needing flexible housing for aging parents, adult children, guests, caregivers, or multigenerational living.
  • Investors and developers looking for compact, repeatable residential designs with broad rental and resale appeal.
  • Urban property owners who want to make better use of limited land with a smaller detached or secondary dwelling.

ADU rules vary by city, county, and state, so always confirm local zoning, setbacks, parking requirements, utility rules, and permitting needs before building.

Common Features in Our ADU Designs

ADU house plans may be small in square footage, but the best designs are big on livability. Smart room flow, built-in storage, efficient kitchens, private sleeping areas, and separate entrances help these compact homes feel complete.

A

Open Living Areas

Combined living, dining, and kitchen areas help small ADUs feel larger, brighter, and easier to furnish.

B

Efficient Kitchens

Compact kitchens can include full appliance layouts, smart storage, and practical prep space without wasting square footage.

C

Private Bedrooms

Many ADU plans include one bedroom, two bedrooms, studio layouts, or flexible sleeping areas depending on the design.

D

Separate Entrances

A private entry helps ADUs work better for guests, tenants, in-laws, home offices, or independent living.

Explore Related Small Living Designs

If you like ADU house plans, you may also want to compare one-bedroom homes, small house plans, modern designs, ranch layouts, and detached garage plans with living space.

1 Bedroom House Plans

Efficient layouts for compact living, guest spaces, rentals, or private backyard homes.

Small Home Plans

Smart, affordable designs that make efficient use of every square foot.

Modern House Plans

Clean lines, simple forms, open interiors, and contemporary curb appeal.

Detached Garage Living

Garage apartments, guest suites, and flexible living space separated from the main house.

All-Inclusive Benefits That Set Us Apart

An ADU plan package should be complete, flexible, and easy to adapt. Our included benefits help homeowners, builders, and investors get more value from every purchase.

Feature Included With Our ADU House Plans?
CAD and PDF files Yes — included
Structural engineering Yes — included
Unlimited build license Yes — included
Free foundation changes Yes — included
Preview all sheets before purchase Yes — included

Our pricing is lower than all major competitors, and our plan sets are more complete. You can preview all plan sheets here, so there is no guesswork about what is included.

Ready to Build Smarter With an ADU?

Our ADU house plans offer unbeatable flexibility and affordability. Whether you are adding an income-producing rental, designing a backyard guest home, creating an in-law suite, or planning a compact private retreat, you get engineered drawings, editable CAD files, printable PDFs, and the freedom to build on your terms.

Explore ADU House Plans Need Custom Modifications?

Frequently Asked Questions About ADU House Plans

What does ADU stand for?

ADU stands for Accessory Dwelling Unit. It is a smaller, self-contained home that shares a property with a main residence.

Can I build multiple ADUs from one plan?

Yes. Our ADU house plans include an unlimited-build license, which gives builders, investors, and property owners more flexibility for repeat projects.

Are ADU house plans legal in my area?

ADU legality depends on local zoning rules, setbacks, parking requirements, utility access, and permitting standards. The plans can be modified to help meet many local requirements, but you should confirm rules with your local building department before construction.

Do your ADU plans include engineering?

Yes. Every ADU house plan includes structural engineering along with CAD files, printable PDFs, and an unlimited-build license.

Can I customize the foundation or layout of my ADU plan?

Yes. Foundation changes are included, and affordable layout modifications are available for room adjustments, exterior changes, roof updates, or site-specific needs.

ADU Design Tip

Before choosing an ADU plan, check your local rules for maximum square footage, height limits, setbacks, parking, utilities, fire separation, entrance placement, and whether detached or attached ADUs are allowed on your property.