How to Build a Built-In Bunk Bed

How to Build a Built-In Bunk Bed

We decided to build a built-in bunk bed so that we could optimize every inch of space! This room was small but now it is so functional. Knocking down the old closet and making space to put these bunk beds opened up the whole room! The bunk bed was so simple to build!! I know you all can do this one! In materials it cost around $200 when I built this. Wood prices have finally dropped lower, so it is even cheaper now! Here is a step-by-step tutorial. 


1X10 mdf finish board
screws (3 inch and 2 1/2 inch)
1/4 inch plywood

Step 1

I made a frame for the ground, because I needed a piece to screw the finish board onto. This is the  dimensions of a twin mattress with an added 2 inches for some wiggle room. I just made this out of 2X4s and screwed it together. 

Step 2

Then I made a frame for the top bunk. I made this out of 2X4s as well but had them standing up instead of down. This was measured the same, 2 inches longer than a twin mattress. Make sure you pre-drill the ends of the boards so it doesn’t split. I used 3 inch screws. 

Step 3

I then needed to secure the top bunk to the wall. You will need to use 3 inch screws and secure them into the studs. We used a 2X4 as a temporary support to help us hold it up. Make sure you level before you screw it in. 

Step 4

I then build out the end wall. I used 2X4s that I planed smooth. You can also just sand them smooth. These are the height of our wall minus a place for a 2X4 to go on the top and the bottom. Then I cut about 5 inches with a 2X4 and placed two of those in between each piece. This is just to add the spacing I needed. I used a brad nailer to connect them together, however, you can just use screws if needed. 

Step 5

Using three inch screws I secured the wall into the ceiling joist. I also attached both bunk beds to the wall. 

Step 6

The next step is to attach a 1X10 mdf finish board to the fronts. Pre-drill the holes. I used 2 1/2 inch screws. 

Step 7

I then painted the front of the finish board with Behr Polar Behr. 

Step 8

Making the ladder is pretty simple. I used planed 2X4 boards. Space out the steps evenly. Pre-drilled them and screwed them together with 2 1/2 inch screws. You will need to cut the top of the ladder at a slight angle so it is a smooth fit against the finish board. I sanded the holes down and filled them in with wood filler.  

Step 9

Put a 1/4 inch plywood on the top bunk, this is so the mattress does not bend through the spaces. 

Step 10

I wanted some sort of guard rail to block the top bunk person from falling off in the night. So I used 2X1 and cut them at a 25 degree angle on each side. I measured from the bottom of the bunk to the ceiling with them angled, we used 5 pieces. Hopefully the picture can explain this one a bit more. It is easy, just hard to explain. I predrilled the holes and screwed them in with 2 1/2 inch screws. Also, I added a 2X4 to the ceiling to secure the top of these pieces. 

I am so happy with how it turned out! I know you can do this. Just so you know, we used Varathane antique white stain and we love it. 

If you love it, you can pin it!

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