How to Build A Mobile Workbench

I asked ChatGPT to help me design a workbench for my shop!

I had a few problems in my shop that I wanted to find a solution for. First, I needed a new workbench/work table for an area in my shop, but I also have a fairly large scrap pile of plywood that has been accumulating against the wall in my shop for the last several years.

I decided to build a workbench and utilize some of that plywood, but I wanted to try something new…

I asked ChatGPT to help me design it! I gave a few prompts about what I was looking for, said I’d like an area where I have room to sit, and voila! Once it created the image for me, I got to work designing the plans.

To see how I built this workbench, watch the full YouTube tutorial.

There you can get the full step by step tutorial as well as see all of the tools that I used.

I was able to pare down my plywood stack a little bit and it was so satisfying. I was actually going to cut most of this up into small pieces and throw it away!

Materials & Tools (Quick List)

• 2×4 lumber (frame + supports)
• 3/4″ plywood (top + shelves; mix of red oak/birch is fine)
• Wood glue
• 2 1/2″ pocket hole screws (frame)
• 1 1/4″ pocket hole screws (attach top)
• 2″ locking casters
• Pocket hole jig + drill/driver
• Miter saw
• Track saw or circular saw (for plywood cuts)
• Jigsaw (for notches)
• Sander
• Measuring/marking tools (Multi-Mark or speed square)
• Clamps

This project can be completed in just a few hours and can be used for a number of things in your garage or shop. You can use it as a workbench, use it as a miter saw table, or even a work table in a craft room. The shelves make it easy to store extra items out of the way and keep things organized, and the open seating area allows you to sit comfortably on a stool to work on things.

Step-by-Step Tutorial

1) Prep the Lumber

• Sand all 2x4s before cutting.
  • This is faster than sanding a bunch of smaller pieces later.

2) Cut the Frame Parts

• Use a miter saw to cut all 2×4 components to size based on your plan/cut list.

3) Drill Pocket Holes

• Set your pocket hole jig for 1 1/2″ material (for 2x4s).
• Drill pocket holes:
  • In both ends of each stretcher
  • Along the length of the stretchers (these will be used later to attach the top)
• If you’re attaching a 3/4″ plywood top, adjust your jig/screw setup accordingly for the top-fastening holes.

4) Assemble the Top Frame

• Build the top rectangle first:
  • Apply wood glue at joints
  • Fasten with 2 1/2″ pocket screws

5) Assemble the Bottom Frame

• Flip the assembly on its side and build the bottom frame the same way:
  • Wood glue + 2 1/2″ pocket screws

6) Add Divider Studs for Shelves + Seating Area

• Measure 24″ from one end to establish the divider location for the shelf section vs. open seating section.
• Attach divider studs using 2 1/2″ pocket screws.

7) Install Casters

• While the frame is easy to access, install the 2″ locking casters on the bottom.

8) Add Shelf Supports

• Cut and install horizontal supports for the upper shelf.
• Use a spacer block (example: 13″ scrap 2×4) to keep shelf supports level and consistent from side to side.

9) Cut Plywood for the Top + Shelves

• Break down your plywood sheet:

• Cut the plywood for the workbench top
• Trim remaining pieces to create the lower shelf
• Cut a separate piece for the upper shelf if needed

10) Mark Notches for Legs & Supports

• Dry fit and mark where the plywood needs notches to fit around:

• The 2×4 legs
• Center supports/dividers

• Use a marking tool (like a Multi-Mark) to outline notch cuts clearly.

11) Cut Notches

• Cut the notches with a jigsaw and clean up edges if needed.

12) Install Shelves

• Slide shelves into place.

• If they fit snugly around the framing, they may not need fasteners.

13) Attach the Workbench Top

• Place the top with a 1″ overhang on all sides.
• Clamp in place.
• Secure from underneath using 1 1/4″ pocket screws.

14) Final Sanding & Cleanup

• Sand the top surface and ease the plywood edges.

• If your plywood has sun fading or rough spots, spend extra time smoothing it out for a cleaner finish.

Download the build plans to get started

I already have plans on how I’ll be using this workbench, but I can’t share that with you just yet, so stay tuned! In the meantime, how would you use a workbench like this? Have you ever thought to have ChatGPT help you design something? Or even visualize something in a room?