This step by step woodworking project is about free 12×24 lean to shed plans. If you want to build a cheap and large shed with a lean to roof, this is the right design for you. In addition, the outdoor shed has a lean to roof with a 3:12 pitch. The plans are PDF downloadable and come with full Cut / Shopping lists. Remember that you need to read the local building codes before selecting the right location for the shed and before building the shed. See my other DIY projects HERE. See all my shed plans HERE.
This lean to shed is sturdy and it features lots of storage space, so if you have garden tools and you like to do small home improvement projects, this is the plan to choose. This shed features a metal sheets roofing, to keep costs down and to promote a design that is simple to build.
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. See all my Premium Plans HERE.
Made from this plan
It’s that simple to build a large lean to shed!
12×24 Lean to Shed Plans – PDF Download
Building-a-12×24-lean-to-shed
Materials
- A – 2 pieces of 2×6 lumber – 12 ft long, 10 pieces – 141″ long 2xFLOOR
- B – 8 pieces of 4×4 lumber – 12 ft long SKIDS
- C – 7 pieces of 3/4″ plywood – 48″x96″ long, 4 pieces – 48″x48″ long FLOORING
- D – 2 pieces of 2×4 lumber – 24 ft long, 1 piece – 281 long, 21 pieces – 79 1/2″ long BACK WALL
- E – 2 pieces of 2×4 lumber – 96″ long, 1 piece – 24 ft long, 1 piece – 281″ long, 15 pieces – 79 1/2″ long, 2 pieces – 72″ long, 3 pieces – 16″ long, 2 pieces – 32″ long, 3 pieces – 24 1/2″ long, 4 pieces – 35″ long, 2 pieces of 2×6 lumber – 99″ long FRONT WALL
- F – 2 pieces of 2×4 lumber – 137″ long, 1 piece – 12 ft long, 10 pieces – 79 1/2″ long 2xSIDE WALL
- G – 2 pieces of 2×4 lumber – 24 ft long, 8 pieces – 91 1/2″ long, 21 pieces – 21″ long TOP WALL FRAME
- 8 pieces of 4×4 lumber – 12 ft
- 24 pieces of 2×6 lumber – 12 ft
- 2 pieces of 2×6 lumber – 10 ft
- 9 pieces of 3/4″ plywood – 4’x8′
- 1 piece of 1/2″ plywood – 4’x4′
- 5 pieces of 2×4 lumber – 24 ft
- 6 pieces of 2×4 lumber – 12 ft
- 70 pieces of 2×4 lumber – 8 ft
- 250 pieces of 2 1/2″ screws
- 1000 pieces of 3 1/2″ screws
- 1000 pieces of 1 5/8″ screws
- 500 pieces of 6d nails
- 16 rafter ties
- 1 box of 1 1/2″ structural screws
- wood filler , wood glue, stain/paint
Tools
- Safety gloves, glasses
- Miter saw, jigsaw
- Chalk line, tape measure, spirit level, carpentry pencil
- Drill machinery and drill bits
Time
- One week
Step 1: How to build a 12×24 lean to shed floor
Floor-frame—12×24-shed
The first step of the project is to assemble the frame for the shed floor. Since it’s a large shed, you can split the frame in half and thus keep the costs down.
Therefore, just cut all 2×6 joists at the dimensions shown in the diagram and lay them on a level surface. Drill pilot holes through the rim joists and insert 3 1/2″ screws into the perpendicular components. Place the joists every 16″ on center. Measure the diagonals for the floor frame and make adjustments until they are perfectly equal.
Assembling-the-12×24-shed-floor
Next, assemble the two frames together tightly as shown in the diagram. Drill pilot holes and insert 2 1/2″ screws to lock the frames together tightly.
Fitting-the-skids—large-shed
Next, fit 4×4 skids under the frame, as shown in the diagram. Use rafter ties and 1 1/2″ structural screws to lock the skids to the floor frame. The skids will lift the floor frame from the ground and thus protect the components from moisture. I also recommend you to remove the vegetation layer under the shed. Level the surface and apply a 2″ layer of gravel, to help with drainage.
Attaching-the-floor-sheets
Also, attach the 3/4″ plywood sheets to the floor frame. Align the edges flush and leave no gaps between them. Insert 1 5/8″ screws every 8″ along the framing.
Step 2: How to build the shed wall frames
Front-wall-frame
Continue the project by building the front wall frame for the storage shed. Cut the components at the right dimensions from 2×4 lumber and then lay them on a level surface. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Place the studs every 16″ on center.
Also, use 2×6 lumber for the double header. Sandwich a piece of 1/2″ plywood between the headers, add glue and insert 2 1/2″ screws from both sides. You can adjust the size of the openings to suit your needs.
Use 2×4 lumber for the window double headers. Notice the door opening and the king studs. The opening is for double 8 ft shed doors, but you can adjust it to suit your needs. In addition, if you want more light inside the shed you can even frame another window to the front wall frame.
Assembling-the-back-wall-frame
Furthermore, build the back wall frame from 2×4 lumber. Drill pilot through the plates and insert 3 1/2″ screws into the studs. Place the studs every 16″ on center, as shown in the diagram. Notice the double studs at both ends of the wall. In addition, place 1/2″ plywood pieces between the double studs. You can also place the studs every 16″ OC, if you need sturdier frames.
Side-wall-frames—diy-shed
Build the side wall frame for the shed in the same manner described above. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. If you want more light inside the shed, you can add windows to the frames.
Step 3: Assembling the shed frame
Assembling-the-frame-of-the-large-shed
Continue the project by fitting the wall frames to the floor frame of the shed. Align the edges flush and plumb them with a spirit level. Drill pilot holes through the bottom plates and insert 3 1/2″ screws into the floor. In addition, lock the adjacent wall frames together tightly with 2 1/2″ screws.
Top-wall-frame—large-shed
Continue the project by framing the top back wall. Use 2×4 lumber for the top back wall. This frame will help you create the lean to for the garden shed. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. You can adjust the size of the studs and thus influence the slope of the shed.
This shed has a roof pitch of 3:12, but you can change that by making these studs taller or shorter. For example, if you want a 4:12 lean tom just add 12″ to the studs (this will also change the shape and size of the rafters).
Fitting-the-top-back-wall-frame
Next, fit the frame to the back of the shed. Align the edges flush, drill pilot holes and insert 3 1/2″ screws to lock it into place tightly. Also, you have to plumb the frames with a spirit level.
Step 4: Finishing touches
12×24-Lean-to-shed-Plans—front-view
You need to take a look over PART 2 of the plans, so you learn how to frame the roof and how to build the double shed doors. The roof will be covered with metal sheets, to keep things light and budget friendly.
12×24-Lean-to-shed-Plans—dimensions
The estimated cost for this storage shed is 3000+ usd. You can build this shed in one week if you take your time and have a friend to help you when assembling the shed and building the roof. This shed design is done with a clear purpose in mind: to simplify everything and to help you get the job done with a low budget. This shed has a full height of over 10 ft.
If you want a slightly smaller shed, you should check out the free plans for this 10×12 lean to shed.
12×24-Lean-to-shed-Plans—front-view
12×20 Lean to shed – free DIY Plans
Last but not least, see how to frame the roof for this 10×16 garden shed, in PART 2 of the project. If you like my project, don’t forget to SHARE it on Facebook and Pinterest. If you want to get this plans as 1 PDF file with full cut list and full shopping list, check out the GET PDF PLANS button bellow.
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