Built-In Twin Bunk Bed

My parents have a home in Florida that has been a great meeting place for our family. When all the grandkids are in town we have a room just for them. The only problem is that, unlit now, we’ve been living with one full bed and three twin mattresses that sat directly on the floor. I decided it was time to knock out some bunk beds for the kids and this time we went for a built-in look. We opted for a lower bed to maximize the space between. Read on to see exactly how we did it.

If you want to see the plans for the same bed but with a full size mattress on the bottom, click here.

Bunk Room Before Rogue Engineer 1
DIY Built In Bunk Beds Rogue Engineer 1 copy

Time to Complete

1 Day

Estimated Cost


Skill Level


Printable PDF


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  • (11) 2 x 4 x 8’ Lumber
  • (7) 2 x 6 x 8’ Lumber
  • (3) 2 x 2 x 8’ (for ladder and rails)
  • (4) 2 x 2 x 8’ (for supports)
  • (11) 1 x 4 x 8’ Furring Strips (Slats)
  • 3” Wood Screws
  • 2-1/2” Wood Screws
  • 1-1/4” Brad Nails or Wood Screws

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DIY Built In Twin Bunk Bed Plans Dimensions

These plans will walk you through how to build a built in twin bunk bed.

  1. Assemble Legs

    DIY Buit In Bunk Bed Step 1

  2. Attach Back

    DIY Buit In Bunk Bed Step 2

  3. Install Side Boards

    DIY Buit In Bunk Bed Step 3

  4. Assemble Frame

    We also added cove molding around the top as well as faux shiplap paneling and quarter round to the wall.

    DIY Buit In Bunk Bed Step 4

  5. Install Slat Supports

    DIY Buit In Bunk Bed Step 5

  6. Finishing

    We went with blue ceilings to fit with the coastal theme, a white frame, and natural wood finish on the railings and ladder.

    Screen Shot 2021 07 21 at 3.51.51 PM

    Screen Shot 2021 07 21 at 3.52.09 PM

  7. Install Ladder & Rails

    DIY Buit In Bunk Bed Step 6

  8. Install Bed Slats

    An upgrade here would be to swap the upper slats for a sheet of 3/4″ plywood. This will give you a more finished look from below.

    DIY Buit In Bunk Bed Step 7

DIY Built In Twin Bunk Bed Rogue Engineer 1

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