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ADU house Plans (450-800 sq. ft.) – Smart, Compact Living with Big Possibilities

Explore Affordable ADU Floor Plans Perfect for Backyard Units, Guest Suites, or Rentals

Find Your Dream house

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"ADU5 portable GPS tracking device"

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, or tiny rental properties. Every one of our ADU house plans comes with editable CAD files, printable PDFs, and an unlimited-build license, giving you total control and maximum flexibility.

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Found 2,712 House Plans!

  • Front elevation of a New American modern traditional house with horizontal siding, stone accents, covered porch, and attached two-car garage

    Plan 18-2241 – Nelson Meadow | New American – 4-Bed, 3-Bath, 3,666 SF – House plan details
  • Front view of a Cape Cod Traditional style home with gray shingle roof, white siding, black shutters, and a welcoming red front door.

    Plan 11-2086 – Rose Ridge Farm | Cape Cod – 3-Bed, 2-Bath, 1,573 SF – House plan details
  • Front elevation of a Coastal Farmhouse style home featuring horizontal lap siding, dormer windows, and a wide covered front porch

    Plan 8-1562 – The Perry Station | Coastal Farmhouse – 3-Bed, 4.5-Bath, 3,694 SF – House plan details
  • Rear view of Modern Farmhouse style home with white horizontal lap siding, upper covered deck, exterior staircase, and walkout basement patio

    Plan 15-1255 – Poplar Brook Cottage | Modern Farmhouse – 4-Bed, 3-Bath, 3,862 SF – House plan details
  • Front view of a Traditional New American style home featuring beige siding, partial stone veneer, symmetrical windows, and a covered porch with columns

    Plan 11-2080 – Ivy Valley Homestead | Traditional – 3-Bed, 2-Bath, 2,592 SF – House plan details
  • Front elevation of a New American Craftsman style house featuring horizontal siding, stone accents, gabled rooflines, and a covered front porch

    Plan 12-2222 – Willow Meadow Estate | New American – 4-Bed, 3.5-Bath, 2,863 SF – House plan details
  • Front exterior of a Traditional Colonial style home featuring horizontal siding, stone accents, symmetrical windows, and a covered entry porch

    Plan 13-2073 – Spruce Run Retreat | Traditional Colonial – 5-Bed, 5-Bath, 3,821 SF – House plan details
  • Front elevation of a traditional New American style brick building with symmetrical windows, gabled rooflines, and classic suburban architecture

    Plan 10-1929 – Statesboro | New American Duplex – 4-Bed, 3.5-Bath, 8,754 SF – House plan details
  • Front view of a Colonial-style home with stone and siding exterior, dark green shutters, and a standing seam metal roof, showcasing timeless traditional architecture

    Plan 17-1037 – The Smith Manor | Colonial – 5-Bed, 5-Bath, 5,621 SF – House plan details
  • Front elevation of a Traditional Ranch style home featuring Craftsman details, stone accents, horizontal siding, dormer window, and a welcoming covered porch

    Plan 8-1378 – James Lodge | Traditional Ranch – 3-Bed, 2-Bath, 576 SF – House plan details
  • Traditional Craftsman House Plan 4 Beds 2575 Sq Ft 2 Stories

    Plan 10-1325 – Cumberland Crossing | Traditional Craftsman – 4-Bed, 2,575 SF – House plan details
  • Front elevation of a two-story Traditional New American style home featuring brick on the first floor, horizontal siding above, and board and batten gable details

    Plan 8-1074 – The Turner Haven | Traditional – 3-Bed, 2.5-Bath, 1,775 SF – House plan details
  • Front exterior of a Traditional Colonial style home with white horizontal siding, black shutters, centered entry, and attached two-car garage

    Plan 12-2611 – Yew Tree Bluff | Traditional Colonial – 6-Bed, 4.5-Bath, 4,522 SF – House plan details
  • Front elevation of a Traditional Colonial Revival style brick home with symmetrical windows, gabled rooflines, and arched entry

    Plan 11-1178 – Copper Springs | Traditional – 3-Bed, 3.5-Bath, 2,411 SF – House plan details
  • Front elevation of a Coastal Low Country style home with board and batten siding, raised pier foundation, covered porches, and symmetrical Southern architecture

    Plan 20-1694 – The Watson Station | Coastal – 3-Bed, 2-Bath, 2,877 SF – House plan details

at Is an ADU?

ADU stands for Accessory Dwelling Unit. It’s a smaller, self-contained residential structure that sits on the same lot as a primary home. Our ADU house plans are designed to meet a variety of uses, including:

  • Backyard rental units
  • Multigenerational housing
  • Guest cottages or studios
  • Home offices with living space
  • Vacation or short-term rental units

Why Choose Our ADU House Plans?

  • Every Plan Includes CAD + PDF Files – Customize and build with ease.
  • Unlimited Build License – Use your ADU plan multiple times, anywhere you want.
  • Structural Engineering Included – All plans are engineered and code-compliant.
  • Free Foundation Changes – Choose slab, crawlspace, or basement at no extra charge.
  • Plans Built After 2008 – Modern layouts designed to reflect today’s zoning and space efficiency.

Who Are ADU House Plans Perfect For?

ADU house plans are ideal for:

  • Property owners in urban areas where land is limited
  • Homeowners wanting a flexible guest suite or rental opportunity
  • Families needing private space for elderly parents or grown children
  • Contractors and developers building multiple ADUs across lots

Common Features in Our ADU Designs

Our ADU house plans may be small in square footage, but they’re big on livability. Typical features include:

  • Open floor plans with combined living and dining areas
  • Efficient kitchens with full appliance layouts
  • 1–2 bedrooms with closet space
  • Full bathrooms
  • Separate entrances for privacy
  • Loft or attic storage options

Build Anywhere With Confidence

Our ADU house plans are designed with flexibility and code compliance in mind. Whether you’re building in California, Texas, Oregon, or beyond—our plans are crafted with local building practices and energy efficiency in mind. And with full CAD files and engineering support, your builder can make adjustments for your exact site or city requirements.

Explore Related Small Living Designs

What’s Included in Every ADU House Plan Package

  • CAD files for editing
  • PDF files for printing
  • Floor plans with dimensions
  • Elevations and cross-sections
  • Roof framing and structural layouts
  • Electrical layout
  • Foundation plan (customizable for free)
  • Preview all plan sheets here

Frequently Paired Features

Learn More About ADU Development

Ready to Build Smarter?

Our ADU house plans offer unbeatable flexibility and affordability. Whether you're adding an income-producing rental or designing a backyard guest home, we give you everything you need—engineered drawings, editable CAD files, and the freedom to build on your terms. No hidden fees, just great designs you can trust.

Explore ADU House Plans Now →

Frequently Asked Questions

 

What does ADU stand for?
ADU stands for Accessory Dwelling Unit—a smaller home that shares a lot with a main residence.

Can I build multiple ADUs from one plan?

Yes! Our ADU house plans come with an unlimited-build license.

Are ADU house plans legal in my area?

ADU legality depends on local zoning laws, but our plans can be modified to meet most codes.

Do your plans include engineering?

Yes! All ADU house plans include structural engineering.

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

Absolutely. We offer free foundation changes and affordable layout edits.