This step by step diy project is about 8×20 shed plans. If you need a significant storage space with an easy access through wide doors, this gable shed is perfect. In addition. I have designed this shed so you can keep the costs down. This shed features double doors on the front and a gable roof with a 5:12 pitch. Make sure you check the local codes and make adjustments to the plans, if required. 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
8×20 Shed Plans
Cut + Shopping Lists
- A – 3 pieces of 4×4 lumber – 240″ long SKIDS
- B – 2 pieces of 2×6 lumber – 240″ long, 8 pieces – 93″ long FLOOR FRAME
- C – 5 pieces of 3/4″ plywood – 48″x96″ long FLOOR
- D – 2 pieces of 2×4 lumber – 8 1/2″ long, 1 piece – 89″ long, 1 piece – 96″ long, 4 pieces – 86 1/2″ long, 2 pieces – 81″ long, 2 pieces of 2×6 lumber – 75″ long FRONT WALL
- E – 2 pieces of 2×4 lumber – 89″ long, 1 piece – 96″ long, 5 pieces – 86 1/2″ long BACK WALL
- F – 2 pieces of 2×4 lumber – 72″ long, 1 piece – 233″ long, 1 piece – 240″ long, 10 pieces of 2×4 lumber – 86 1/2″ long, 2 pieces – 81″ long, 2 pieces of 2×6 lumber – 99″ long SIDE WALL
- G – 2 pieces of 2×4 lumber – 240″ long, 1 piece – 233″ long, 13 pieces of 2×4 lumber – 86 1/2″ long SIDE WALL
- H – 9 pieces of T1-11 siding – 48″x94″ long, 4 pieces – 48″x92 1/2 long, 1 piece – 8 1/2″x48″ long SIDING
- 3 pieces of 4×4 lumber – 20′
- 2 pieces of 2×6 lumber – 20′
- 13 pieces of 2×6 lumber – 8′
- 2 pieces of 2×6 lumber – 10′
- 1/2″ plywood
- 5 pieces of 3/4″ plywood – 4’x8′
- 5 pieces 2×4 lumber – 20′
- 41 pieces of 2×4 lumber – 8′
- 13 pieces of T1-11 siding – 4’x8′
- 6d nails, 2 1/2″ screws, 3 1/2″ screws
- wood filler , wood glue, stain/paint
How to build a 8×20 shed
The first step of the project is to build the floor frame. Cut the components from 2×6 lumber at the right dimensions. Place the joists every 16″ or 24″ on center, for a professional result. The 16″ spacing will allow you to store heavy items, while the 24″ spacing will help you save money. Check if the corners are are square, drill pilot holes through the rim joists and insert 3 1/2″ screws.
Select the location for the shed and level the surface thoroughly. Remove the vegetation layer and make sure the location complies with the local codes. Fit the skids on the location. Place the floor frame and then use rafter ties to lock the skids to the frame.
Fit the 3/4″ plywood sheets to the floor frame and align the edges with attention. Insert 1 5/8″ screws every 8″ along the joists. Leave no gaps between the sheets for a professional result.
Build the plain side wall of the shed from 2×4 lumber. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Align the edges and make sure the corners are square.
Build the opposite side wall for the shed, using the information from the diagram. As you can see in the image, the wall has an opening for 8′ double doors. Use 2×6 lumber and 1/2″ plywood for the double header. Lock the double header into place with screws. Make sure the corners are square for a professional result.
Continue the project by assembling the front wall frame. Use 2×4 lumber for the front wall frame. Use 2×6 lumber 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. Build a double header for the door from 2×4 lumber and 1/2″ plywood. You can adjust the size of the door opening to suit your needs.
Build the back wall for the shed using the same techniques described above and the information from the diagram.
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 the T1-11 siding sheets to the side of the storage shed. As you can see in the diagram, you need to make cuts so you can fit the panels around the large side opening.
Fit the T1-11 siding sheets to the opposite side of the shed. Use 2″ nails to secure the sheets into place, every 8″ along the frame.
Fit the sheets to the front of the shed. As you can see in the diagram, you need to make the cuts so you create the door opening.
Fit the T1-11 siding panels to the back of the shed. Align the edges with attention and leave no gaps between the sheets. Insert 6-8d nails every 8″ along the framing.
Make sure you check out PART 2 of the shed, where I show you how to build the gable roof.
Take a look over PART 2 and PART 3 of the project, so you learn how to build the double doors and the roof. 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 plan 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 8×20 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.