8×20 Lean to Shed Plans

This step by step diy project is about 8×20 lean to shed plans. I have designed this lean to shed so you can store outdoor furniture and tools. This shed is built on a 2×4 framing and it features a lean to roof, making this shelter the ideal choice if you have limited space in your backyard. 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. If you have all the materials and tools required for the project, you could get the job done in about a day. See all my Premium Plans HERE.

Projects made from these plans

8×20 Lean to Shed Plan

Building-a-8×20-lean-to-shed

Cut List

• A – 2 pieces of 2×6 lumber – 240″ long, 16 pieces – 93″ long FRAME
• B – 6 pieces of 4×4 lumber – 120″ long SKIDS
• C – 4 pieces of 3/4″ plywood – 48″x96″ long, 2 pieces – 48″x48″ long FLOOR
• D – 1 piece of 2×4 lumber – 240″ long, 1 piece – 233″ long, 1 piece – 12″ long, 1 piece – 198″ long, 18 pieces – 86 1/2″ long, 2 pieces – 36″ long, 3 pieces – 37″ long, 2 pieces – 78 1/2″ long, 4 pieces of 2×6 lumber – 27″ long, 2 pieces – 33″ long SIDE WALL
• E – 2 pieces of 2×4 lumber – 240″ long, 1 piece – 233″ long, 18 pieces – 86 1/2″ long SIDE WALL
• F – 2 pieces of 2×4 lumber – 8 1/2″ long, 1 piece – 96″ long, 1 piece – 89″ long, 4 pieces – 86 1/2″ long, 2 pieces – 81″ long, 2 pieces of 2×6 lumber – 75″ long FRONT WALL
• G – 2 pieces of 2×4 lumber – 89″ long, 1 piece – 96″ long, 7 pieces – 86 1/2″ long BACK WALL
• H – 2 pieces of 2×4 lumber – 240″ long, 16 pieces – 35 1/4″ long TOP FRONT WALL
• F – 4 pieces of T1-11 siding – 48″x92 1/2″ long, 10 pieces – 48″x94″ long, 5 pieces – 48″x38 1/4″ long SIDING

Shopping List

• 2 pieces of 2×6 lumber – 20′
• 20 pieces of 2×6 lumber – 8′
• 6 pieces of 4×4 lumber – 10′
• 5 pieces of 3/4″ plywood – 4’x8′
• 8 pieces of 2×4 lumber – 20′
• 68 pieces of 2×4 lumber – 8′
• 17 pieces of T1-11 siding – 4’x8′
• 8d galvanized screws
• 3 1/2″ screws
• 1 5/8″ screws
• rafter ties
• wood glue, stain/paint, wood filler

Tools

 Hammer, Tape measure, Framing square, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses

Time

One week

Related

• PART 1: 8×20 Lean to Shed Plans
• PART 2: 8×20 Lean to Shed Roof Plans

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Building a 8×20 lean to shed

Building-the-floor-frame-for-the-8×20-shed

First of all you have to assemble the floor frame for the lean to shed. Use 2×6 boards for the joists and cut them at the dimensions shown in the diagram. Place the joists every 16″ on center and make sure the corners are square. Drill pilot holes and insert 3 1/2″ screws to assemble the frame of the floor. Measure the diagonals and make adjustments until they are perfectly equal.

Fitting the skids to the floor frame

Use 4×4 lumber for the skids. Place the skids under the floor frame and use rafter ties to lock them into place. The skids will lift the floor frame from the ground and protect the joists from moisture.

You need to select the location for the shed and remove the vegetation layer. Lay a thick layer of gravel and level the surface thoroughly. The gravel will help with the water drainage and thus protect the wooden components from the moisture.

Floor sheets – 8×20 lean to shed

Use 3/4″ tongue and groove plywood sheets for the floor of the lean to shed. Cut the sheets at the dimensions shown in the diagram and lay them to the floor frame of the shed. Align the edges flush and insert 1 5/8″ screws to lock them into place tightly. Insert the screws every 8″ along the framing.

Building the shed wall frames

Plain-side-wall-frame—large-lean-to-shed

Use 2×4 lumber for the side wall frame. Cut the studs at 85 1/2″ and then secure them to the plates with 3 1/2″ screws or nails. Place the studs every 16″ on center and make sure the corners are square. Notice the double studs that are placed at both ends of the wall frame.

Side-wall-with-window-and-door-frame

Next, we need to assemble the side wall that has a window and a door. You 2×4 lumber for the frame, as well. Drill pilot holes through the plates and insert 3 1/2″ screws / nails into the studs. Frame the window with the double headers (sandwich 1/2″ plywood between the 2x6s beams). Remember that you can adjust the size of the windows to suit your needs.

Front-wall-frame—8×20-shed

The front door features an opening for the double doors. In addition, you need to fit the double header to the top of the opening. Build the header from 2 pieces of 2×6 lumber and 1/2″ plywood. Glue the components of the header together and insert screws to lock everything tightly. You can adjust the size of the double doors to suit your needs.

Back-wall-frame—8×20-lean-to

Build the back wall for the lean to shed, as shown in the diagram. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs.

Assembling the shed structure

Assembling the frame of the 8×20 lean to shed

Fit the wall frames to the floor of the shed. Align the edges flush and make sure the corners are square. In addition, use a spirit level to make sure the walls are plumb. Drill pilot holes through the bottom plates and insert 3 1/2″ screws into the floor of the lean to garden shed. Don’t forget to lock the adjacent walls together, as well. Check if the corners are square, before inserting the screws.

Top front wall frame – 8×20 lean to shed

Use 2×4 lumber for the top front wall, as well. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs, as well. Place the studs every 16″ on center. Make sure the corners are square.

Fitting the top front wall frame – shed diy

Fit the wall frame to the front of the shed. Align the edges flush, drill pilot holes and insert 3 1/2″ screws to assemble the frame of the shed.

Fitting the shed siding sheets

Side wall siding – 8×20 lean to shed

Use T1-11 siding sheets for the side wall panels of the shed. Align the edges flush and leave no gaps between the sheets. Insert 6d nails, every 8″ along the framing.

Front wall siding sheets – lean to shed

Fit the siding sheets to the front of the lean to shed. Use a saw to make the cuts around the double door opening.

Side tall wall siding sheets – 8×20 shed

Use 5/8″ T1-11 siding sheets for the side walls. Align the edges flush and leave no gaps between the sheets. Insert 6d nails, every along the framing. Maker the cuts around the window and door opening.

Back wall siding sheets

Attach the siding sheets to the other side of the shed. Align the edges flush and insert 6d galvanized nails to secure the sheets to the wall frames. Align everything with attention and insert the nails every 8″ along the studs.

8×20 Lean to Shed Plans – back view

8×20-lean-to-shed-plans

Don’t forget to take a look over PART 2 of the project, so you learn how to build the roof for the shed. If you build this, I would love to see your project. I have lots of lean to shed plans on the blog, so make sure you check them out before deciding a shed size.

If you want to get this project as a PDF file, with 1 single Cut list and 1 single Shopping list, please check out the GET PDF PLANS button bellow.

This woodworking project was about 8×20 shed plans. 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.

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