Free Woodworking Plans to Build a Mod Sectional Corner Unit

06.21.11 By //

Project Image

This is the Corner unit and is used for the outside edges as well. In fact this entire modular seating can be made using only the corner and single units arranged in different groupings. It can also be used alone as singular seating!

With 2 corner units and a single unit:



Tape Measure






1 – 2×3 @ 10'

1 – 2×3 @ 8'

5 – 1×3 @ 10'

1 – 1×2 @ 6' (you only need a small amount of this, so check the scrap pile first)


3″ Screws – Galvanized or Stainless is best for outdoor use

2″ Screws – Galvanized or Stainless is best for outdoor use

Wood Glue

Wood Filler or a Paintable Silicone if you prefer


Finishing Supplies

Cut List 

4 – 2×3 @ 27 1/2″ (Back Legs)

2 – 2×3 @ 14 1/4″ (Front Legs)

1 – 2×3 @ 31″ (Back Rest)

1 – 2×3 @ 28 1/2″ (Back Rest)

1 – 1×2 @ 14 1/4″ (Center Legs)

4 – 1×3 @ 27″ (Side Rails and Front and Back of Frame)

3 – 1×3 @ 25 1/2″ (Supports)

2 – 1×3 @ 27″ ( Dark Blue Side Slats)

1 – 1×3 @ 25 1/2″ (Red Back Seat Slat)

1 – 1×3 @ 28 1/2″ (Light Blue)

11 – 1×3 @ 26″ (Light Green Perimeter and Seat Slats)


**Always Pre-Drill and Counter Sink for the most professional appearance. Check for Square after EACH step. It will really matter in this project.

**For outdoor use, choose rot resistant and weather tolerable wood such as Cedar, Redwood, and Teak. You would be well suited to pre-drill, sand, and finish each board before assembling to ensure complete protection and a lasting finish.

Before beginning to build, always check in on my site to make sure you have the most up to date set of plans, I occasionally update and change the plans to make the building process easier or to allow for less expensive purchasing of materials!

Read through the entire set of instructions and all comments before beginning this project. If you print out or save plans, be sure to check in on my site to be sure you have the most up to date set of plans, as I occasionally update things for ease of building or buying. If you are new to building, read through the GETTING STARTED section and other articles found under the BUILD tab in the menu on my site, it has valuable information about how to get started, tools and techniques. If you are unfamiliar with the finishing process, visit my Finishing school for some tips and tricks for painting like a pro and for special finishing practices.

Use glue to secure your joints and Consider Painting or Staining individual sections prior to assembling. This makes the paint application virtually flawless. Coat with a spray on Poly or Wipe on Poly to protect your finish and your piece and it will last for ages. Adhere to all safety standards and guidelines, and be sure you follow safety protocol throughout your build. If you are unsure about whether you are building safely, run a quick online search for the tool or technique you are using, or contact me via email or post to the forum before you move ahead. My contact info can be found in the menu of my site.

Step 1

Step 1 

Attach the Center Legs to each other: Use 2″ Screws and Wood Glue

Step 2

Step 2 

Build the Frame: Use 2″ Screws

Step 3

Step 3 

Attach the Frame to the Legs: Use 2″ Screws

Step 4

Step 4 

Attach the Seat Perimeter: Use 2″ Screws

Step 5

Step 5 

Attach the Slats to the Frame: Use 2″ Screws

Step 6

Step 6 

Attach the Back Rests: Use 3″ Screws

Fill any Screw, Nail or Pocket Holes, Sand and Finish as Desired. For Finishing Tips and Tricks visit my Finishing School


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**Disclaimer: Some rights reserved. Private use only. Feel Free to link to any of my plans so long as you provide an adequate link back to the appropriate post! Plans from this page are not to be used for commercial purposes or republished without the express written consent of Rayan Turner, The Design Confidential I hope to provide accurate plans, however, I cannot guarantee each plan for accuracy. Not every plan that I post has been built and tested, so you are building at your own risk. It is recommended that you have a clear understanding of how the project works before beginning any project. Please contact me if you find an error or inaccuracy so that I might fix it.

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