400 Square Foot New American Backyard ADU

Plan 370038SEN

  • 400

    Heated s.f.

  • 1

    Beds

  • 1

    Baths

  • 1

    Stories

  • Turn your backyard into a wealth generating income or provide a loved one their own space to be close and independent with this extremely economical 400 square foot accessory structure.  Most states allow an accessory structure to be built in your back yard so long as it fits within your building envelope (setbacks). 
  • The front studio gets great natural light through the sliding door panels - filled with windows - that open to the covered porch as well as from the clerestory windows above. Use this as a living room , an art or writing studio or as a guest bedroom with sleeping couch.
  • There's seating at the counter in the fully functional kitchen. A pocket door opens to the stacked washer dryer.
  • The bathroom has a walk-in shower

Each plan set includes the following: 


  • COVER SHEET
  • GENERAL NOTES
  • ELEVATIONS
  • FOUNDATION PLAN
  • FLOOR PLANS AND NOTES
  • BUILDING SECTION
  • ROOF PLAN
  • ELECTRICAL PLAN
These items are NOT included:

  • Architectural or Engineering Stamp - handled locally if required
  • Site Plan - handled locally when required
  • Mechanical Drawings (location of heating and air equipment and duct work) - your subcontractors handle this
  • Plumbing Drawings (drawings showing the actual plumbing pipe sizes and locations) - your subcontractors handle this
  • Energy calculations - handled locally when required

NOTE:
If you want to purchase this plan in reverse, please select "readable reverse" or "mirror reverse" under Options above.
400 Square Foot New American Backyard ADU - 370038SEN floor plan - Main Level

Special features

Plan Collections

400 Square Foot New American Backyard ADU

  • 400

    Heated s.f.

  • 1

    Beds

  • 1

    Baths

  • 1

    Floors

Floor Plan

  • Main Level

Plan Details

Square Footage Breakdown

  • Total: 400 sq. ft.
  • 1st Floor: 400 sq. ft.

Dimensions

  • Width: 20' 0"
  • Depth: 20' 0"
  • Max ridge height: 14' 6"

Beds/Baths

  • Bedrooms: 1
  • Full bathrooms: 1

Foundation Type

    • Standard Foundations: Slab
    • Optional Foundations: Walkout, Monolithic Slab, Daylight, Crawl, Basement

Exterior Walls

  • Standard Type(s): 2x4
  • Optional Type(s): 2x6

Ceiling Heights

  • Floor / Height: First Floor / 8' 1"

Roof

  • Primary Pitch: 6 on 12
  • Secondary Pitch: 2 on 12
  • Framing Type: Stick And Truss
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400 Square Foot New American Backyard ADU

  • 400

    Heated s.f.

  • 1

    Beds

  • 1

    Baths

  • 1

    Floors

400 Square Foot New American Backyard ADU

  • 400

    Heated s.f.

  • 1

    Beds

  • 1

    Baths

  • 1

    Floors

Plan Details

Square Footage Breakdown

  • Total: 400 sq. ft.
  • 1st Floor: 400 sq. ft.

Dimensions

  • Width: 20' 0"
  • Depth: 20' 0"
  • Max ridge height: 14' 6"

Beds/Baths

  • Bedrooms: 1
  • Full bathrooms: 1

Foundation Type

    • Standard Foundations: Slab
    • Optional Foundations: Walkout, Monolithic Slab, Daylight, Crawl, Basement

Exterior Walls

  • Standard Type(s): 2x4
  • Optional Type(s): 2x6

Ceiling Heights

  • Floor / Height: First Floor / 8' 1"

Roof

  • Primary Pitch: 6 on 12
  • Secondary Pitch: 2 on 12
  • Framing Type: Stick And Truss

    Main Level