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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 view of a Traditional Colonial Revival house with lap siding, decorative shutters, and a welcoming front porch with white columns and a front-entry garage

    Plan 13-1459 – Aster Trail Lodge | Traditional – 3-Bed, 2.5-Bath, 2,710 SF – House plan details
  • Front elevation of a Cape Cod style cottage home featuring shingle siding, horizontal lap siding, stone foundation, and a welcoming covered entry

    Plan 13-1915 – Aster Trail Residence | Cape Cod – 5-Bed, 4.5-Bath, 2,049 SF – House plan details
  • Front elevation of a New American modern traditional house with white siding, covered front porch, and two-car garage

    Plan 12-1091 – Aster Trail Villa | New American – 3-Bed, 3.5-Bath, 2,292 SF – House plan details
  • Front elevation of a two-story Traditional Colonial home with horizontal lap siding, brick foundation, and symmetrical windows over a double garage

    Plan 8-1264 – Aster Trail Hall | Traditional Colonial – 4-Bed, 2.5-Bath, 2,574 SF – House plan details
  • Front elevation of a New American Modern Traditional house with painted brick exterior, symmetrical gables, shutters, and covered entry

    Plan 20-2199A – Aster Trail Haven | New American – 4-Bed, 4-Bath, 3,925 SF – House plan details
  • Front elevation of a Traditional Colonial style home with stone base, cream horizontal siding, and black-trimmed windows under steep gables

    Plan 8-1804 – Aster Trail Place | Traditional Colonial – 3-Bed, 2.5-Bath, 2,455 SF – House plan details
  • Front elevation of a French Country Transitional European style home featuring stone accents, horizontal siding, steep gables, and balanced architectural symmetry

    Plan 11-1025 – Aster Trail Farm | French Country – 4-Bed, 5-Bath, 6,655 SF – House plan details
  • Front elevation of a Traditional Colonial style home with horizontal siding, brick porch foundation, symmetrical windows, and attached two-car garage

    Plan 17-1956 – Aster Trail Chalet | Traditional Colonial – 3-Bed, 4.5-Bath, 2,816 SF – House plan details
  • Front elevation of a Coastal Traditional beach house with wraparound porches, balconies, lap siding, and brick foundation

    Plan 15-1769 – Aster Pointe Manor | Coastal Traditional – 4-Bed, 3-Bath, 3,411 SF – House plan details
  • Beach House Blueprint 2.5-Story Home with Split Garage

    Plan 14-1462 – Aster Pointe Retreat | Beach House – House plan details
  • Front elevation of a Modern Farmhouse style home with board and batten siding, stone veneer, covered porch, and double garage

    Plan 10-1369 – Aster Pointe Cottage | Modern Farmhouse – 4-Bed, 4.5-Bath, 2,905 SF – House plan details
  • Front exterior view of a traditional Colonial style two-story home with white horizontal siding, symmetrical windows, gabled roof, and covered front porch

    Plan 11-1285 – Aster Pointe House | Colonial – 4-Bed, 3.5-Bath, 3,333 SF – House plan details
  • Front elevation of a Traditional Colonial style two-story home with horizontal lap siding, symmetrical windows, gabled roof, and attached garage

    Plan 8-1388 – Aster Pointe Homestead | Traditional Colonial – 4-Bed, 3.5-Bath, 2,496 SF – House plan details
  • Front elevation of a Coastal Traditional Charleston style house with white lap siding, raised brick base, double front porches, and symmetrical windows

    Plan 13-2089 – Aster Pointe Farmhouse | Coastal Traditional – 6-Bed, 5-Bath, 3,765 SF – House plan details
  • Front exterior of a New American Modern Traditional home featuring painted brick, stone accents, steep gables, and symmetrical architecture

    Plan 18-1253 – Aster Pointe Lodge | New American – 6-Bed, 5-Bath, 6,175 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.