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Do It Yourself (DIY) ADU Kits

There's nothing more rewarding than the satisfaction of building your own home.

We have the perfect solution for the DIYer in you, looking to build an ADU but don't know where to start or have the time for a long, drawn-out process.

Each of our DIY Kits come with 8'H primed modular exterior walls, that easily attaches to a rail system, using precut holes and sheet metal screws. A metal roof truss is available as an added option, completing the quick and easy kit.

In a few simple steps, you'll be feeling like the next HGTV star, building your own McCain Homes DIY ADU.

What's Included in the Kits?
  • Primed 8' Exterior Modular Wall Panels
  • Window Openings
  • Door Openings
  • Metal Roof Truss (optional)

5 DIY Kits to Choose From

  • McCain Homes ADU Studio DIY Kit

    Studio DIY

  • McCain Homes ADU Studio DIY Kit
  • McCain Homes ADU Studio DIY Kit
  • McCain Homes ADU DIY Kit
  • McCain Homes ADU Studio DIY Kit

14' x 27'| 378 sq ft

  • Kit Includes:
    • 8' Exterior Modular Wall Panels
    • Window Openings (4)
    • Door Openings (1)
    • Roof Truss (optional)
  • OPTION 1 - Walls Kit Only: $13,000
    OPTION 2 - Walls & Roof Kit: $22,300

  • McCain Homes ADU 700L DIY Kit

    700L DIY

  • McCain Homes ADU 700L DIY Kit
  • McCain Homes ADU 700L DIY Kit
  • McCain Homes ADU DIY Kit
  • McCain Homes ADU 700L DIY Kit
  • McCain Homes ADU 700L DIY Kit

14' x 32' x 34' | 742 sq ft

  • Kit Includes:
    • 8' Exterior Modular Wall Panels
    • Window Openings (3)
    • Door Openings (2)
    • Roof Truss (optional)
  • OPTION 1 - Walls Kit Only: $22,000
    OPTION 2 - Walls & Roof Kit: $37,600
  • McCain Homes ADU 500 DIY Kit

    500 DIY

  • McCain Homes ADU 500 DIY Kit
  • McCain Homes ADU 500 DIY Kit
  • McCain Homes ADU DIY Kit
  • McCain Homes ADU 500 DIY Kit

14' x 35'| 490 sq ft

  • Kit Includes:
    • 8' Exterior Modular Wall Panels
    • Window Openings (5)
    • Door Openings (2)
    • Roof Truss (optional)
  • OPTION 1 - Walls Kit Only: $16,100
    OPTION 2 - Walls & Roof Kit: $26,700

  • McCain Homes ADU 1K DIY Kit

    1K DIY

  • McCain Homes ADU 1K DIY Kit
  • McCain Homes ADU DIY Kit
  • McCain Homes ADU 1K DIY Kit

14' x 34' x 53' | 1,022 sq ft

  • Kit Includes:
    • 8' Exterior Modular Wall Panels
    • Window Openings (7)
    • Door Openings (2)
    • Roof Truss (optional)
  • OPTION 1 - Walls Kit Only: $27,200
    OPTION 2 - Walls & Roof Kit: $46,900
  • McCain Homes ADU 700 DIY Kit

    700 DIY

  • McCain Homes ADU 700 DIY Kit
  • McCain Homes ADU 700 DIY Kit
  • McCain Homes ADU DIY Kit

14' x 53'| 742 sq ft

  • Kit Includes:
    • 8' Exterior Modular Wall Panels
    • Window Openings (7)
    • Door Openings (2)
    • Roof Truss (optional)
  • OPTION 1 - Walls Kit Only: $21,200
    OPTION 2 - Walls & Roof Kit: $34,200

McCain Homes ADU DIY Kits

Order Your Kit in 5 Simple Steps

  1. Choose Your DIY kit
  2. Order it
  3. Pay for it
  4. We'll ship it
  5. You'll build it

And just like that, you'll have a modular structural building ready to customize the interior into the space you need.

* McCain Manufacturing reserves the right to change product specifications and pricing without notice. Contact us for up-to-date information.

Before Starting

Contact your local city and county planning department for up-to-date rules and regulations before starting.

Product Support

Coming Soon
Learn how to build your DIY ADU kit by following along to the how-to instructions and videos.

Need a Custom Size Kit? No problem.

Send us a drawing of the layout and dimensions of the structure, and we'll send you an estimate right away.

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McCain Homes

Let's Connect


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Vista, CA 92081
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