12×18 Run In Shed Plans

This step by step woodworking project is about free run in shed plans. This shelter is roomy enough for you to store a lot of items and keep them protected against the bad weather. With minimal adjustments you can even use this shed for storing firewood. My plans come with step by step instructions and you can easily adjust all the dimensions to suit your needs. See my other DIY projects HERE.

We recommend you to invest in the best materials you could afford. Therefore, you should buy weather-resistant lumber, such as pine or cedar. Always take accurate measurements before adjusting the size of the components at the proper size. Drill pilot holes trough the components before inserting the wood screws, to prevent the wood from splitting.



Made from this plan




12×18 Run In Shed Plans





  • A – 2 pieces of 4×4 lumber – 216″ long SKIDS
  • B – 1 pieces of 2×4 lumber – 134 3/4″ long, 1 piece – 139″ long, 1 piece – 33″ long, 1 piece – 27″ long, 1 piece – 21″ long, 1 piece – 14 3/4″ long, 1 piece – 8 1/2″ long, 1 piece – 2 1/2″ long 2xSIDE WALL
  • C – 1 piece of 3/4″ plywood – 48″x96″ long 2xTOP WALL
  • D – 2 piece of 2×4 lumber – 200″ long, 12 pieces – 81″ long BACK WALL
  • F – 1 piece of 2×10 lumber – 216″ long SUPPORT



  • One Day


Building the run in shed frame



Start the project by assembling the wall frames for the run in shed. As you can see in the free plans, you have to assemble the back wall from 2×4 lumber. Cut the components with a sharp saw and then drill pilot holes through the plates. Insert 3 1/2″ screws to secure the studs to the plates. Fit the 2×4 studs every 24″ on center and make sure the corners are perfectly square.



Next, frame the side walls for the run in shed. Drill the pilot holes through the plates and insert 3 1/2″ screws to lock everything together tightly. Work with attention and with great care so you get the job done in a professional manner.



Last, but not least, you also need to frame these triangular frames that will go on top of the side walls. Cut the components with attention, paying attention to the diagram. Use 3 1/2″ screws to lock everything together tightly.



Fit the triangular frames into place and secure them to the side walls with 2 1/2″ screws. Drill pilot holes after aligning the edges flush and insert 2 1/2″ screws. Add glue to the joints and make sure there are no gaps between the components. Assemble the frame of the shed tightly, using 3 1/2″ screws.



Fit 4×4 skids to the frame of the shed. Drill pilot holes through the bottom plates and insert 3 1/2″ screws into the skids.



Attach the 2×8 or 2×10 support beam to the top of the front wall. Clamp the beam to the walls after making sure it is perfectly horizontal. Drill pilot holes and insert 3″ lag screws to lock them into place tightly.



If you want build this run in shed you should check out PART 2 of the project, where I show you how to frame the roof. As you can see this shelter is ideal if you want to store a few agricultural tools or even a horse. In addition, you might even dry out firewood in this roomy shed. If you like my project, don’t forget to SHARE it on Facebook and Pinterest.

Smart Tip: Don’t forget to share your projects with me, as I love seeing what you guys are working on. Send me the pics HERE. In addition, take a look over the rest of my DIY projects HERE.



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