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.

Read More Featured Home Plans
Bedrooms
  • 0
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6+
Bathrooms
  • 2
  • 2.5
  • 3
  • 3.5
  • 4
  • 4.5
  • 5+
Floors
  • 1
  • 2
  • 3
  • 4+
Htd. Sq. Ft.
Width (Ft.)
Depth (Ft.)
Loading...
Plan Price
Architectural Style
# of Garage Bays
Bed and Bath
Ceiling Features
Structure Type
Garage Features
Indoor
Kitchen Features
Outdoor
Exterior Material
Size/Unique
Loading...

Found 2,712 House Plans!

  • Front elevation of a New American and Traditional Colonial style home with horizontal siding, symmetrical gables, and covered front porch

    Plan 11-1652 – Mayfield | New American – 2-Bed, 2.5-Bath, 2,832 SF – House plan details
  • Front elevation of a New American modern traditional house with stone entry, shingle gables, and horizontal siding

    Plan 14-1327 – Oak Dene | New American – 4-Bed, 3.5-Bath, 2,625 SF – House plan details
  • Front exterior of a New American Craftsman style home with board and batten siding, brick accents, decorative gables, and covered front porch

    Plan 8-2039 – Thornfield | New American – 4-Bed, 3.5-Bath, 4,662 SF – House plan details
  • Front exterior view of a New American Modern Traditional house featuring horizontal lap siding, stone accents, gabled rooflines, and an attached two-car garage

    Plan 16-1601 – Wisteria Manor | New American – 4-Bed, 4-Bath, 3,200 SF – House plan details
  • Front elevation of New American Modern Traditional house with stone veneer, lap siding, arched entry, and layered gables

    Plan 13-1456 – Ashbury Estate | New American – 5-Bed, 5-Bath, 2,869 SF – House plan details
  • Front elevation of a New American style house featuring stone veneer, board-and-batten siding, gabled rooflines, and symmetrical modern traditional detailing

    Plan 13-1621 – Thornhill Manor | New American – 3-Bed, 3.5-Bath, 2,864 SF – House plan details
  • Front elevation of a New American Craftsman style home featuring horizontal lap siding, stone accents, gabled rooflines, and a welcoming covered entry

    Plan 17-1386 – Honeysuckle Hall | New American – 5-Bed, 4-Bath, 2,615 SF – House plan details
  • Rear exterior view of a New American style garage apartment with horizontal lap siding, front-load garage, gabled rooflines, and traditional suburban detailing

    Plan 17-1304 – Foxbury Manor | New American – 4-Bed, 3.5-Bath, 2,527 SF – House plan details
  • Front elevation of Traditional Colonial style home with full brick exterior, black shutters, gabled roof, and centered entry

    Plan 15-1606 – Blackthorn Hall | Traditional Colonial – 5-Bed, 3-Bath, 4,414 SF – House plan details
  • Front elevation of luxury coastal beach style home with elevated foundation, white siding, wraparound porches, and palm trees at sunset

    Plan 16-CARPENTER – Whispering Pines | Coastal – 5-Bed, 5-Bath, 3,722 SF – House plan details
  • Elevated coastal beach house with shingle siding, wraparound porches, metal roof, and under-home garage designed for a narrow coastal lot

    Plan 13-1926 – Gloomthorn Hall | Coastal – 4-Bed, 5-Bath, 3,276 SF – House plan details
  • Front elevation of a New American style two-story house with Craftsman trim, Colonial symmetry, board-and-batten siding, stone accents, and covered front porch

    Plan 20-1738 – Nightshade Estate | New American – 4-Bed, 3.5-Bath, 1,458 SF – House plan details
  • Front exterior of a New American Modern Farmhouse style home with board and batten siding, gabled rooflines, covered porch, and side-entry garage

    Plan 18-1609 – Hollowghast Mansion | New American – 5-Bed, 4-Bath, 3,750 SF – House plan details
  • Front view of Traditional Ranch home with New American styling, stone veneer, horizontal lap siding, dormers, and front-entry garage

    Plan 10-1929 – Elevate House | TRIPLEX-New American – 4-Bed, 3.5-Bath, 8,754 SF – House plan details
  • Front exterior of a New American modern traditional house featuring painted brick, shingle gables, Craftsman trim, and a covered front porch

    Plan 17-1853B – Ravenloft Manor | New American – 5-Bed, 3.5-Bath, 3,996 SF – House plan details
  • Timeless 1.5-Story House Plan with Vaulted Ceilings & Craftsman Blueprint

    Plan 10-1428 – Bleakmoor Castle | Timeless Craftsman – 3-Bed, 3,253 SF – House plan details
  • Front elevation of a New American Traditional style house featuring horizontal siding, stone wainscot, symmetrical windows, and a covered porch

    Plan 15-1775 – Robin's Nest | New American – 4-Bed, 3.5-Bath, 3,200 SF – House plan details
  • Front elevation of a New American style home featuring brick exterior, Craftsman detailing, gabled rooflines, and a covered front porch

    Plan 11-1529 – Hydrangea Hideaway | New American – 4-Bed, 4-Bath, 2,897 SF – House plan details
  • Traditional brick-and-shake home with front-entry 2-car garage, gabled dormers, and covered entry—Craftsman/Cottage accents

    Plan 12-1047 – Dovetail Drive | Traditional – 5-Bed, 3-Bath, 2,798 SF – House plan details
  • Front elevation of Craftsman style house with gray horizontal lap siding, gabled rooflines, shutters, and covered front porch

    Plan 15-1248 – Primrose Manse | Craftsman – 3-Bed, 2-Bath, 2,040 SF – House plan details
  • Front elevation of a Traditional Colonial Suburban style home featuring gray horizontal siding, red shutters, symmetrical windows, and classic covered porch entry

    Plan 10-1648 – Seacrest | Traditional – 3-Bed, 2-Bath, 1,521 SF – House plan details
  • Front elevation of a New American style farmhouse home with board-and-batten siding, stone accents, metal porch roof, and symmetrical gabled design

    Plan 19-1240 – Dragonfly Villa | New American – 4-Bed, 3-Bath, 3,334 SF – House plan details
  • Front exterior view of a Traditional Colonial style home with red brick exterior, white trim, symmetrical facade, and covered front porch

    Plan 12-2172 – Blossom House | Traditional Colonial – 5-Bed, 4-Bath, 3,845 SF – House plan details
  • Craftsman-style home plan with stone and board-and-batten exterior

    Plan 13-1339 – Canterbury Court | Craftsman – 4-Bed, 3-Bath, 2,748 SF – House plan details
  • Front exterior view of a Cape Cod style house featuring horizontal siding, brick porch base, dormer windows, and a traditional gabled roof

    Plan 13-1237 – Abalone Manor | Cape Cod – 4-Bed, 4-Bath, 3,343 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.

✓

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.

✓

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.

✓

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.