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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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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 Coastal Low Country beach house with blue horizontal siding, double stacked porches, white railings, and an elevated two-car garage

    Plan 16-1438 – Aster Knoll Farmhouse | Coastal – 5-Bed, 5.5-Bath, 3,442 SF – House plan details
  • Front elevation of a modern farmhouse style home featuring white board and batten siding, black windows, gabled rooflines, covered porch, and attached two-car garage

    Plan 17-2128 – Aster Knoll Residence | Modern Farmhouse – 4-Bed, 3.5-Bath, 3,074 SF – House plan details
  • Front view of a Craftsman Modern Farmhouse featuring board and batten siding, stone accents, and dark wood trim under a steep gable roofline

    Plan 18-1588 – Aster Knoll Villa | Craftsman – 4-Bed, 4.5-Bath, 3,487 SF – House plan details
  • Front elevation of a New American style house featuring brick and stone exterior, symmetrical windows, arched entry, and attached two-car garage

    Plan 8-1591 – Aster Knoll Hall | New American – 3-Bed, 3.5-Bath, 3,840 SF – House plan details
  • Front elevation of a New American Traditional style house featuring horizontal siding, stone accents, gabled rooflines, and an attached garage

    Plan 16-1735 – Aster Knoll Haven | New American – 5-Bed, 4-Bath, 3,941 SF – House plan details
  • Front exterior of Traditional Ranch style brick home with low-pitched roof, large windows, and mature oak trees in warm sunset lighting

    Plan 10-1079 – Aster Knoll Place | Traditional Ranch – 4-Bed, 3.5-Bath, 3,352 SF – House plan details
  • Front elevation of New American Colonial home with horizontal lap siding, stone veneer accents, gabled rooflines, and covered front porch

    Plan 10-1772 – Aster Knoll Farm | New American – 4-Bed, 3-Bath, 2,740 SF – House plan details
  • Front elevation of a New American modern traditional house featuring board and batten siding, stone accents, gabled rooflines, and an inviting arched entry

    Plan 14-1133 – Aster Knoll Chalet | New American – 4-Bed, 3.5-Bath, 3,671 SF – House plan details
  • Front view of a Colonial Farmhouse with horizontal siding, covered porch, breezeway, and detached two-car garage under a clear blue sky

    Plan 8-2003 – Aster Trail Manor | Colonial Farmhouse – 4-Bed, 3-Bath, 3,730 SF – House plan details
  • Front view of a Cottage style home featuring stone and horizontal siding exterior with black shutters and a welcoming entryway

    Plan 14-1213 – Aster Trail Estate | Cottage – 3-Bed, 2.5-Bath, 2,587 SF – House plan details
  • Front elevation of a Traditional Suburban home featuring horizontal siding, stone accents, a gable dormer, and a two-car garage

    Plan 20-1560 – Aster Trail Retreat | Traditional Suburban – 3-Bed, 2-Bath, 1,600 SF – House plan details
  • Classic Shingle Style New American Home with Stone and Shake Exterior

    Plan 20-1525 – Aster Trail Cottage | Shingle Style – 4-Bed, 3-Bath, 2,841 SF – House plan details
  • Front exterior of a Modern Farmhouse and New American style home with white painted brick, steep gabled roofs, black windows, and an attached two-car garage

    Plan 20-1249C – Aster Trail House | Modern Farmhouse – 5-Bed, 5-Bath, 4,081 SF – House plan details
  • Front elevation of a modern farmhouse cottage style home featuring board and batten siding, stone accents, black shutters, and an attached two-car garage

    Plan 20-1062 – Aster Trail Homestead | Modern Farmhouse – 4-Bed, 3.5-Bath, 2,005 SF – House plan details
  • Front elevation of a Traditional Ranch style home with Cape Cod detailing, horizontal siding, brick foundation, and two-car garage

    Plan 8-1107 – Aster Trail Farmhouse | Traditional Ranch – 4-Bed, 3.5-Bath, 2,458 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.