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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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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 Colonial Neo-Colonial style home with brick lower level, shingle siding upper story, symmetrical windows, and traditional detailing

    Plan 8-1894 – Aster Lane Lodge | Colonial – 4-Bed, 4.5-Bath, 3,371 SF – House plan details
  • Front elevation of a New American modern traditional house featuring stone accents, horizontal siding, gabled rooflines, and a covered front porch

    Plan 20-1891 – Aster Lane Residence | New American – 4-Bed, 3.5-Bath, 2,713 SF – House plan details
  • Front elevation of a New American modern traditional house with board and batten siding, stone foundation, metal roof, and side-entry garage

    Plan 16-1375 – Aster Lane Villa | New American – 4-Bed, 3.5-Bath, 2,727 SF – House plan details
  • Front elevation of a Cape Cod style house featuring horizontal siding, stone accents, symmetrical windows, and a covered entry porch

    Plan 14-1431 – Aster Lane Hall | Cape Cod – 3-Bed, 3.5-Bath, 2,776 SF – House plan details
  • Front elevation of a New American modern traditional house with board and batten siding, brick accents, tall windows, and a welcoming covered entry

    Plan 20-2095 – Aster Lane Haven | New American – 4-Bed, 4-Bath, 3,185 SF – House plan details
  • Front elevation of a New American modern traditional house featuring board-and-batten siding, stone accents, symmetrical windows, and a steep gabled roof

    Plan 11-1234 – Aster Lane Place | New American – 5-Bed, 4.5-Bath, 4,853 SF – House plan details
  • Front view of a Traditional Farmhouse with horizontal siding, board and batten details, stone skirting, and a welcoming covered porch entry

    Plan 7-2227 – Aster Lane Farm | Traditional Farmhouse – 3-Bed, 2-Bath, 2,712 SF – House plan details
  • Front elevation of a Traditional Suburban style home with horizontal lap siding, gabled rooflines, covered porch, and attached two-car garage

    Plan 10-1070 – Aster Pass Manor | Traditional – 3-Bed, 2-Bath, 1,516 SF – House plan details
  • Front elevation of a Modern Farmhouse style home with board and batten siding, painted brick exterior, steep gabled rooflines, and attached garage

    Plan 19-1791 – Aster Pass Estate | Modern Farmhouse – 5-Bed, 3.5-Bath, 4,250 SF – House plan details
  • Front elevation of a Transitional Farmhouse style home with stone veneer, white horizontal lap siding, covered porch, and gabled roof at sunset

    Plan 16-1548 – Aster Pass Retreat | Transitional Farmhouse – 4-Bed, 3.5-Bath, 4,509 SF – House plan details
  • Front elevation of French Country style ranch home with stone and brick exterior, gabled rooflines, shutters, and landscaped yard

    Plan 15-1169 – Aster Pass Cottage | French Country – 4-Bed, 4.5-Bath, 4,756 SF – House plan details
  • Front elevation of a New American style two-story house featuring horizontal siding, board-and-batten accents, stone veneer, and a covered front porch

    Plan 16-1365 – Aster Pass House | New American – 4-Bed, 3.5-Bath, 2,929 SF – House plan details
  • Front elevation of a Traditional Craftsman Suburban style home featuring brick, horizontal siding, board and batten accents, and classic architectural detailing

    Plan 8-1954 – Aster Pass Homestead | Traditional Craftsman – 3-Bed, 2-Bath, 1,642 SF – House plan details
  • Front elevation of a New American Traditional style home featuring stone veneer, horizontal siding, steep gable rooflines, and a covered front porch

    Plan 14-1047 – Aster Pass Farmhouse | New American – 4-Bed, 3-Bath, 4,289 SF – House plan details
  • Front elevation of a Traditional Craftsman suburban home featuring brick exterior, board-and-batten gables, dormers, and a covered front porch

    Plan 14-2030 – Aster Pass Residence | Traditional – 3-Bed, 2-Bath, 2,521 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.