Skip to main content

How to Build a DIY Office in Your Garage for Under $500

Dean loves to share DIY construction tips and tricks with their readers.

Building an office has never been easier.

Building an office has never been easier.

How to Build a Small Office in Your Garage

Have you always wanted a decent home office that is not shared in a bedroom or a common space? Somewhere where you can get away from distractions and be able to concentrate without being disturbed? If so, I can help you!

I constructed an office in my garage, and it is the best thing I’ve done in a while and enables me to get on with my day-to-day work in comfort. I have a standard double garage and have created an office space of 2.8m x 2.1m, which is more than ample for one person and all my requirements.

You will need to pick a corner, preferably with a window for natural light and a power point, which is not a total requirement. If you are DIY-minded, this really is a simple task, and no planning permission is needed.

Drawing I done for layout

Drawing I done for layout

Materials Needed

FYI: The material measurements are from my personal office. Yours will be different.

  • 5 sheets of MDF board (or ply board) @ 2400mm x 1200mm x 25mm thickness
  • 20 metres of 50mm x 25mm pine batten
  • 12 L brackets (25mm)
  • 60 or 65mm and 25mm screws
  • An extra pair of hands to assist with the boards

DIY Garage Office Instructions

  1. Mark on the floor with a chalk line or a straight edge the size of office space you require. Choosing a corner will mean you will only require two new walls. Most garages will be less than 2.4m in height, so it will be easier to have your boards upright.
  2. Where your boards will butt up to the existing walls, use a spirit level and mark from ceiling height down to the floor. You can check this by using a thin string with a weight on the end (plumb line).
  3. Lift your first board into place and secure the bottom with 3 L brackets with 25mm screws, which should be inside the office space.
  4. Cut a length of 50mm x 25mm to the length of the first wall you are working on (not the length of the first board) and fix it to the ceiling alongside your first board. You will need to make sure you can get a fixing to a timber inside the loft space when you screw it, don’t rely on just the ceiling board.
  5. When the 50 x 25mm batten is fixed to the ceiling, screw through the board into the batten every 400mm. Now, your board will be able to stand unassisted.
  6. You can now cut your second board to match the size of the batten which is remaining. You need to be very accurate with your cut to get a good finish.
  7. Apply a bead of wood glue down the exposed edge of the first board and butt the second board (uncut edge) up to the first board. Make sure both boards butt up tight to each other.
  8. Fix 3 more L brackets to the bottom of the board and screw through the board into a batten to secure the top. Now you are nearly halfway and not too difficult, hey?
  9. So you will now need to cut a batten to fit from the other existing wall to butt up to the side of the batten previously fitted on the ceiling, not on the end of the existing one, making it longer.
  10. Now put your third sheet into place, creating a 90-degree angle and giving it a nice clean external corner. Fix screws at 400mm intervals from top to bottom through the second board into the third board.
  11. Fix 3 more L brackets to the bottom length of the third board and through the board into a batten at the top; this is where you see the new office taking shape.
  12. Fit the fourth board the same way as board two.
  13. You will now have to cut the last board to fit the remaining piece of the jigsaw, and once that is complete, you will have to decide where the door will go and the opening size. A standard internal flush door is fine and can be purchased relatively cheap. Whatever size you decide on, you will need to allow 3mm on each side (6mm total), 3mm for the top and enough to clear the floor covering you decide on. With the size of the door, add the above measurements for clearance, and this will be the size you cut out of the final board.
  14. Once you have cut out the frame for the door, fix the last board using the same technique as the first board.
  15. Cut and fix 2 lengths of the batten to go around the boards' top edge, which will secure them in place and create a ’sandwich’ effect.
  16. Cut and fix a batten to both sides of the first and last boards where it goes from ceiling to floor.
  17. Cut and fix 3 lengths of batten to the inside of the cut-out you did for the door opening; this will create your door frame by screwing every 400mm.
  18. If you want to make it look a little more professional, fit skirting’s/trim to the bottom, inside and out, which will also serve the purpose of hiding the L brackets and any gaps that might be visible. You can also fit a glass panel if you want additional light, which should be decided before undertaking this project.

Adding Outlets in a Garage Office

I have fitted a workbench to create a desk space, which takes up less space, but it could be easier to just move a desk you already have into the space.

Once you know where your electrical items (computer, printer, etc.) will be, you will need to add a couple of power outlets. Only undertake this yourself if you are familiar with electrics.

The Finished Office in My Garage

There you have it. Hopefully, this tutorial gave you all the tips and tricks you need to build your own office. Good luck and feel to ask any questions!


Richard from Texas on February 26, 2020:

What a great idea. A neat, clean install with just the right amount of space to set up computer and filing cabinets, run cables and phone lines and you're all set. A cave within your 'man cave'.

Richard Hampton

Garage Door Mart Inc from 5800 E lake dr, apt.613, Lisle, Chicago, IL, USA 60532 on October 12, 2016:

Perfect Article for Garage Doors. Interesting!

Mike on November 27, 2015:

How do you heat and cool it inexpensively.

Window units are loud for an office...

Mike T. on March 17, 2012:

I am in need of this. Perfect for my online business. I am not a all!! But if I was to hire someone to do this what would you think the cost would be if they were to follow your strategy??

Toolsonline from Up to my Neck in it! on February 02, 2012:

Great piece of work, I am in the process of building an office in a set of rooms that I have just built into the corner of our plot.

Sarah Carlsley from Minnesota on January 19, 2012:

Very good idea! This would definitely be helpful, it's nice to work from home but it's nice to be "away" from things like that too. Good work here, it really looks nice!

Related Articles