This step by step diy project is about 10×20 lean to shed plans. This large shed with a lean to roof is a great addition to any property, if you need a lot of storage space and you value efficiency more than design. You can easily customize this shed buy adding a side man door and several windows. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.
When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. See all my Premium Plans HERE.
Projects made from these plans
10×20 Lean to Shed Plans
- A – 3 pieces of 4×4 lumber – 240″ long SKIDS
- B – 2 pieces of 2×6 lumber – 240″ long, 16 pieces – 117″ long FLOOR
- C – 4 pieces of 3/4″ plywood – 48″x96″ long, 2 pieces – 48″x48″ long, 2 pieces – 24″x96″ long, 1 piece – 24″x48″ long FLOORING
- D – 2 pieces of 2×4 lumber – 72″ long, 1 piece – 240″ long, 1 piece – 233′ long, 14 pieces – 86 1/2″ long, 2 pieces – 78 1/2″ long, 2 pieces of 2×8 lumber – 99″ long FRONT WALL
- E – 2 pieces of 2×4 lumber – 113″ long, 1 piece – 120″ long, 9 pieces – 86 1/2″ long 2xSIDE WALL
- F – 2 pieces of 2×4 lumber – 240″ long, 1 piece – 233″ long, 18 pieces – 86 1/2″ long BACK WALL
- G – 4 pieces of T1-11 siding – 48″x92 1/2″ long, 2 pieces – 24″x92 1/2″ long, 4 pieces – 48″x94″ long, 1 piece – 11″x48″ long SIDING
- 3 pieces of 4×4 lumber – 20′
- 2 pieces of 2×6 lumber – 20′
- 16 pieces of 2×6 lumber – 10′
- 7 pieces of 3/4″ plywood – 4’x8′
- 5 pieces of 2×4 lumber – 20′
- 6 pieces of 2×4 lumber – 10′
- 54 pieces of 2×4 lumber – 8′
- 2 pieces of 2×8 lumber – 10′
- 10 pieces of T1-11 siding – 4’x8′
- 6d nails, 2 1/2″ screws, 3 1/2″ screws
- wood filler , wood glue, stain/paint
Hammer, Tape measure, Framing square, Level
Miter saw, Drill machinery, Screwdriver, Sander
- PART 1: 10×20 Lean to Shed Plans
- PART 2: 10×20 Lean to Shed Roof Plans
- PART 3: 10×20 Shed Door Plans
It’s that easy to build a 10×20 shed – Video!
Building a 10×20 lean to shed
The first step of the project is to build the floor frame. Cut the components at the right dimensions and then lay them on a level surface. Drill pilot holes through the rim joists and then insert 3 1/2″ screws into the perpendicular beams. Place the joists every 16″ on center, as in the diagram. Make sure the corners are square and the edges flush, before inserting the screws.
Select the location for the shed and make sure you remove the vegetation layer. Level the ground thoroughly and then fit the 4×4 skids under the floor frame. If you want to lift the floor frame even more, use 6×6 lumber. Align the edges and use rafter ties to secure the skids to the frame of the floor. Use a spirit level to make sure the frame is horizontal in all directions. Check out the local building codes before building the shed, so you make sure you comply with the requirements.
Fit a piece of 3/4″ plywood to the floor frame. Align the edges flush and insert 1 5/8″ screws, every 8″ along the framing. Leave no gaps between the sheets for a professional result. Use the pattern shown in the diagram, for a professional result.
Building the wall frames
Continue the project by assembling the front wall frame. Use 2×4 lumber for the front wall frame. Use 2×8 lumber and 1/2″ plywood for the double header. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Make sure the corners are square and align the edges flush. You can adjust the size of the door opening to suit your needs. You can adjust the size of the opening to suit your needs.
Build the frame for the back wall from 2×4 lumber. Cut the components from 2×4 lumber at the right dimensions. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Make sure the corners are square and place the studs every 16″ on center.
Build the side walls for the shed using the same techniques described above and the information from the diagram. Place the studs every 16″ on center. You can fit a window to the side walls, so make sure you make the appropriate modifications to the wall frames.
Assembling the shed frame
Fit the wall frames to the floor of the shed. Align the edges with attention and plumb the walls with a spirit level. Drill pilot holes through the bottom plates and insert 3 1/2″ screws into the floor. Lock the adjacent walls together tightly using 3 1/2″ screws.
Fit T1-11 siding panels to the sides of the shed. Leave 1 1/2″ from the top of the wall and insert 2″ nails, every 8″ along the framing. Leave no gaps between the sheets for a professional result.
In order to attach the siding sheets to the front of the shed you need to make a few cuts. Mark the cut lines and then get the job done with a circular saw. Insert 2″ nails, every 8″ along the framing. You will use the cutout panel for the door.
This large storage shed is easy to build and if you choose to build it by yourself using my plans, you will save a lot of money. You can adjust the plans by adding more doors or windows. according to your needs. If you add a ramp, this shed will be even more versatile.
Make sure you take a look over PART 2 and PART 3 of the project, so you learn how to build the lean to roof and how to build the decorative trims. I have lots of other shed projects on the site so I recommend you to browse through all alternatives before starting the building project. See all my shed projects HERE. If you want to get this project as a PDF file with 1 full Cut list and 1 full Shopping list, please take a look over the GET PDF PLANS button bellow.
This woodworking project was about 10×20 lean to shed plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.
For the plywood flooring it should say 48×48 2 pc. Not 24×48 2 pc. There is only one of this size needed for the front right corner ,which is already listed😊
Thank you. I have updated the list.
Where do you recommending finding the 20 ft long pieces?
Menards, Lowes etc
Should the flooring be constructed with treated lumber?
Yes, that would be advisable.
Yes, I recommend that.
For leveling the skids, how far apart should the supports or block or what ever be? Or how many should I use to support the floor? I have uneven ground so it can sit more or less on the ground at one end but it’ll be off the ground at the other end.
Is that a complete material list under the shed portion of the plans?
Yes, the second list is the materials list.
For this shed, could the top of the back wall be extended to 48″ to allow room for storage? If so, would the front need to be raised some too?
Thank you so much for the plans! We are building a very large shed right now with your plans.
But I need another copy of our plans. I cant copy my original, because it s all modified and written on.
How do I print the plans? In the FAQs it says there is a “floating widget” to print, but there is not.
Again, than you. This is awesome!
For the time being the print function is disabled, due to some issues with people selling my free plans on other platforms. I will solve this legally and then make the print function available again.