2x4 Outdoor Sofa

Submitted by Ana White on Sat, 03/16/2019 - 13:11
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Build your own outdoor sofa with just 11 2x4s.  Ana White plans include step by step diagrams and shopping and cut list.

We also have a plans to convert this sofa to an outdoor sectional, a matching outdoor coffee table plan, and outdoor wood finishing secrets.

outdoor sofa sectional made from 2x4s with blue cushions
outdoor sofa stained chocolate brown with white cushions and matching coffee table

Build your own outdoor sofa!  You'll just need some 2x4s and screws!  

Turn your outdoor sofa into a sectional with these plans:

We also share our outdoor wood finishing secrets in this post.

dimensions diagram for outdoor sofa
Dimensions shown above. Recommend: Build to suit cushions


Shopping List

11 - 2x4x10’ (prefer cedar boards)

150 - 2-1/2” to 3" long, self-tapping exterior decking screws  (#8, #9 or #10 will all work) 

Cut List

RECOMMEND: Build to suit cushions.  

9 - 2x4 @ 72”  (or cushion width x times 3)

13 - 2x4 @ 25-1/2” (or cushion depth plus 1-1/2")

2 - 2x4 @ 28-1/2” (or cushion depth plus 4-1/2")

Tape Measure
Speed Square
Miter Saw


Step 1

Cut the seat framing boards with compound miter saw or similar.

Screw together with self tapping screws.

Step 2

Now for the arms.

Cut the boards.

Attach longer 2x4 to two of the shorter 2x4s with screws.

Step 3

Screw together with screws.

Step 4

Screw together with screws, also attach to board from step 3.

Step 5

Step 6

Attach seat boards to top of seat frame with 2-3/4" screws.

Step 7

Screw back piece at an angle into the arms with 2-3/4" screws.  You can also use pocket holes.

Step 8

Some builders add a middle row to the back/sides to help keep cushions in line.

Help Improve This Plan

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Sat, 04/18/2020 - 20:13

Loved this plan! Super easy to follow and easy on the wallet. Only complaint is the amount of waste, but not really much could be done about that.


Sun, 04/19/2020 - 16:49

Hi Ana,
I am getting ready to build this. I bought all the wood today. I have a couple questions though. For some reason I thought this planned called for pocket holes. (I have the Kreg kit). I guess I'm confusing it with another plan. So my question is it says to screw pieces together with the self tapping screws....but don't you see those after it's complete? I'm confused on why you wouldn't use pocket holes.
My next question is how hard would it be to make the back slanted? I saw a plan for a sofa that had a slanted back but I went this this plan because I am making a U shaped sectional. I would really like the back to be slanted though...but I don't think I could just wing it. I would need step by step directions and exact cuts. I'm a beginner!

Thanks for the help!


Fri, 05/01/2020 - 14:36

Can anyone tell me why the sofa and the one arm sofa that you put together to make the sectional are 2 different lengths? The cushions would be the same size so wouldn't you need the same length. One is 72" and one is 70 1/2". Unless I'm reading it wrong.


Thu, 05/21/2020 - 22:06

If you look closely at the diagrams for each sofa, on the sectional piece without the arm on one end, the back corner wood piece is turned differently since there is "no arm" attached on that end. It's turned sideways. So, that probably explains the slight difference in length.


Thu, 05/14/2020 - 10:13

Hi there. Just building this for our garden.
Having an issue with the arms. The 28 1/2” cut seems to be an inch too short for the frame and to get the 25 1/2” support in also.
As 25 1/2”+ 2”x 2 for both legs is 29 1/2”. Does this make sense? Has anyone else had this issue please?