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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

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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 traditional suburban brick home with symmetrical gables, arched entryway, and attached two-car garage

    Plan 12-1046 – Aster Garden Haven | Traditional – 5-Bed, 3-Bath, 3,059 SF – House plan details
  • Front exterior view of a New American modern traditional house featuring stone accents, horizontal siding, board-and-batten details, and a welcoming covered porch

    Plan 18-2169 – Aster Garden Place | New American – 3-Bed, 3-Bath, 2,700 SF – House plan details
  • Front elevation of a New American style home with brick and lap siding exterior, covered front porch, and classic modern traditional detailing

    Plan 8-1396 – Aster Garden Farm | New American – 4-Bed, 3.5-Bath, 3,428 SF – House plan details
  • Front elevation of a New American modern traditional two-story home with horizontal siding, stone accents, and symmetrical suburban design

    Plan 12-2608 – Aster Garden Chalet | New American – 5-Bed, 4.5-Bath, 3,795 SF – House plan details
  • Front elevation of a Craftsman Bungalow Cottage home featuring horizontal lap siding, stone column bases, and a welcoming covered porch

    Plan 8-1966 – Aster Willow Manor | Craftsman Bungalow Pool House – 2-Bed, 1-Bath, 1,150 SF – House plan details
  • Front elevation of a Shingle Style New American house with shingle siding, symmetrical façade, dormer windows, covered front porch, and classic Colonial Revival detailing

    Plan 14-2016 – Aster Willow Estate | Shingle Style – 6-Bed, 5.5-Bath, 5,507 SF – House plan details
  • Front elevation of a Southern Low Country style home with raised brick foundation, horizontal siding, double garage below, and wide covered front porch

    Plan 8-1383 – Aster Willow Retreat | Southern Low Country – 4-Bed, 3.5-Bath, 3,042 SF – House plan details
  • Rear elevation of a Contemporary Mountain style home featuring board-and-batten siding, horizontal siding, stone columns, brick accents, and a metal roof

    Plan 19-1382 – Aster Willow Cottage | Contemporary Pool Guest House – 4-Bed, 2-Bath, 1,184 SF – House plan details
  • Front view of Modern Farmhouse style home with horizontal lap siding, board and batten gables, covered porch, and attached two-car garage

    Plan 13-1965 – Aster Willow House | Modern Farmhouse – 5-Bed, 4-Bath, 3,250 SF – House plan details
  • Front elevation of Coastal Cottage style home with horizontal lap siding, metal roof, and covered wraparound porch

    Plan 16-1012 – Aster Willow Homestead | Coastal Cottage – 4-Bed, 5.5-Bath, 3,759 SF – House plan details
  • Front elevation of a Neoclassical Classical Southern style home with symmetrical design, double porches, painted siding, and stone exterior base

    Plan 18-1514 – Aster Willow Farmhouse | Neoclassical – 5-Bed, 5-Bath, 7,880 SF – House plan details
  • Front elevation of modern farmhouse style home with board and batten siding, stone accents, gable rooflines, and attached garage

    Plan 11-1052 – Aster Willow Lodge | Modern Farmhouse – 3-Bed, 3.5-Bath, 2,827 SF – House plan details
  • Front elevation of a Coastal Low Country beach house with elevated foundation, double porches, and shingle siding exterior

    Plan 9-1604 – Aster Willow Villa | Coastal – 4-Bed, 3.5-Bath, 2,950 SF – House plan details
  • Front elevation of Traditional suburban home with brick exterior, shake gables, arched entry, and symmetrical windows at sunset

    Plan 15-1170 – Aster Willow Hall | Traditional – 4-Bed, 4.5-Bath, 4,230 SF – House plan details
  • Front elevation of a New American traditional suburban house featuring horizontal siding, symmetrical gables, shuttered windows, and an attached two-car garage

    Plan 20-1554 – Aster Willow Haven | New American – 3-Bed, 4-Bath, 6,002 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.