Our sunroom really needed some cute outdoor furniture, so I came up with plans to build a DIY outdoor couch! This was my first piece of DIY outdoor furniture that I’ve built and now I want to build a whole matching set!
I love how our outdoor couch turned out and I’m excited to share the step by step tutorial! The couch was designed to fit with two sets of these beautiful, outdoor cushions (the Sevilla Replacement Cushions), which I’m loving so far too! They are on mega sale right now (50% off), even less than what I bought them for on sale!
One of the best features about this DIY outdoor couch is that it only cost $30 in lumber to build!!! The exterior stain I used was an additional $15, so a total of $45 for me to build it!
Note, this post contains some affiliate links. For more info see my disclosures here.
How to build a DIY Outdoor Couch:
- (8) 2×3 @ 8ft (framing lumber)
- (2) 1×3 @ 8ft
- 2 1/2″ Deck Screws (optional – see step #2)
- 2″ brad nails
- 2 1/2″ Kreg screws (weather resistant)
- Stainable wood filler
- (2) sets of outdoor cushions (I used these Sevilla Occasional cushions)**
- Exterior wood stain (I used a quart of Valspar exterior stain in Pinebark)
**If you use different cushions, make sure to adjust the below cut measurements!
The final size of this DIY outdoor couch is 26″ tall x 62 1/2″ wide x 30 1/4″ deep.
1. Make cuts for outdoor couch frame
Use a miter saw and make the following cuts from the 2x3s:
- 4 pieces @ 24 1/2″
- 2 pieces @ 30 1/4″
- 5 pieces @ 57 1/2″
- 8 pieces @ 27 1/4″
2. Assemble DIY outdoor couch side frames
Add two pocket holes with the Kreg Jig to each end of two of the 27 1/4″ pieces.
Tip: See my how to use a Kreg Jig post for an easy, step by step tutorial and video tutorial on how to use the Kreg Jig!
Mark 10″ up from the bottom of one of the 24 1/2″ pieces (on the edge of it). Attach one of the 27 1/4″ pieces perpendicularly to the 24 1/2″ piece at the 10″ mark. Make sure to attach it so the edge of the 27 1/4″ piece is flush with the top edge of the 24 1/2″ piece as shown in the below photo. I used a scrap 1×2 and paint stick underneath of the board to help with this part!
Then attach the two together with 2 1/2″ Kreg screws. Repeat this process on the other side of the 27 1/4″ piece. Once complete your side frame piece will look like this:
Next, attach one of the 30 1/4″ boards to the top of the frame with 2 1/2″ deck screws and so they are countersunk beneath the wood surface (you will fill them with wood filler later). I forgot to get deck screws, so I just used Kreg screws instead, which works too! To do this, I used a 3/8″ drill bit and drilled a shallow hole, just deep enough to cover my screw head. Then, I drilled my pilot hole inside of that larger hole with a smaller bit for the Kreg screw. Lastly, I drilled in my Kreg screw to attach the two boards.
Repeat on the back of the side frame piece and then your side frame is complete!
Repeat the above process to create the second side frame piece for your DIY outdoor couch.
3. Add side slat boards to side frames
Now it’s time to add the horizontal slat boards to the side frames. This step is totally optional. These slats are more a decorative feature than structural. I think they make the DIY outdoor sofa look really cool and will help prevent throw pillows from falling out the sides!
Measure the exact distance between the two legs of the side frames and cut three 1x3s to this size. The measurements should be close to 27 1/4″ but since we’re working with framing lumber, they will probably be a little different. Each of my three slats were a little different in size, so make sure to measure exactly where the board is going. The boards should be spaced out 1 3/4″ from each other:
Attach the 1×3 slat boards with a brad nailer and 2″ brad nails.
Repeat the above process for the second side frame.
4. Assemble bottom frame of DIY Outdoor Sofa
Add pocket holes to both ends of the remaining 6 boards @ 27 1/4″ AND to the ends of the 5 boards @ 57 1/2″.
Then use Kreg screws and attach four of the 27 1/4″ boards perpendicularly to two of the 57 1/2″ boards as shown in the below photo. Make sure the 57 1/2″ boards pocket holes are facing the inside. Space the 27 1/4″ boards about 6″ part and attach the first and fourth board about 14 1/2″ up from the side board ends. Note, you will add the other 2 boards in soon, but not yet so you can easily fit your drill in the space and attach this bottom frame to the side frame in the next step.
5. Attach bottom frame to outdoor couch side frames
Attach the bottom frame to the side frames using 2 1/2″ Kreg screws and 10″ up from the ground (as shown in photo below). It helps to place the side frame flat on the floor and have a second person hold up the bottom frame on top of it.
Once both side frames have been attached to the bottom frame, go ahead and add the last two 27 1/4″ boards on the bottom frame (from step #4). If it’s difficult to get them in place, use a hammer to tap them in place better.
6. Add back frame boards to DIY outdoor couch
Turn the outdoor couch on its side and use Kreg screws to attach the remaining three, 57 1/2″ boards to the side frames to create the back frame of the couch (space the boards about 2 3/4″ apart).
Flip your couch back up and your DIY outdoor couch build is finished yay!!!
7. Fill holes, sand, and stain
Fill the 4 screw holes and nail holes in with stainable wood filler. If you haven’t sanded your boards yet (I like to do most of my sanding before starting), go ahead and sand them well. Finish off your project with exterior wood stain! I used Valspar semi transparent exterior stain in Pine bark. It was one of the only exterior stains I could find that came in a quart size and not a gallon size. And it only took one coat!
After staining, let your couch dry for a full 24 hours, then add the cushions, and enjoy!!!
Here’s another angle of it!
I loveeee this DIY outdoor couch so much, I’m thrilled with how it turned out and the low cost! In the spring I’d like to build a matching chair set to go with it!! How fun would that be?!
So, what do you think of this build? It fits great in small spaces and it has really helped to start transforming our sunroom into an enjoyable, cute, and functional space. Next up, I need some kind of wall art to go above it!
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