8×12 Lean to Shed Plans – PDF Download

This step by step diy project is about diy 8×12 lean to storage shed plans. This large backyard shed comes with a base of 8 ft x 12 ft and a lean to roof, with a 3:12 pitch. In addition, this shed has double doors to the front wall. Read the local codes and make adjustments to comply with your local requirements. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.

Building an 8×12 lean-to shed is a great project that’s both affordable and manageable. You can expect to spend around $1,200 to $1,800 on materials, depending on your choices and finishes. As for the time commitment, plan on dedicating about 2 to 3 weekends to complete this project, working at a steady pace. It’s a fantastic way to add extra storage space to your property without taking too much time or money!

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.

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8×12 Lean to Storage Shed Plans – PDF Download

Building a 8×12 lean to shed

Cut List

A – 3 pieces of 4×4 lumber – 12 ft long SKIDS
B – 2 pieces of 2×6 lumber – 12 ft long, 10 pieces – 93″long JOISTS
C – 2 pieces of 3/4″ plywood – 48″x96″ long, 2 pieces – 48″x48″ long FLOOR
D – 2 pieces of 2×4 lumber – 12 ft long, 1 piece – 137″ long, 12 pieces – 91 1/2″ long BACK WALL
E – 1 piece of 2×4 lumber – 12 ft long, 1 piece – 137″ long, 2 pieces – 36″ long, 10 pieces – 91 1/2″ long, 2 pieces – 78 1/2″ long, 6 pieces – 7 1/2″ long, 2 pieces of 2×6 lumber – 75″ long FRONT WALL
F – 2 pieces of 2×4 lumber – 89″ long, 1 piece – 96″ long, 7 pieces – 91 1/2″ long 2xSIDE WALL
G – 2 pieces of 2×4 lumber – 12 ft long, 12 pieces – 20 1/4″ long TOP WALL
H – 5 pieces of 5/8″ T1-11 siding – 4’x8′ long, 1 piece – 48″x16″ long, 3 pieces – 48″x23″ long TOP WALL

Shopping List

3 pieces of 4×4 lumber – 12 ft
3 pieces of 3/4″ plywood – 48″x96″
1 piece of 1/2″ plywood – 48″x96″
6 pieces of 5/8″ T1-11 siding – 4’x8′
2 pieces of 2×6 lumber – 12 ft
12 pieces of 2×6 lumber – 8 ft
5 pieces of 2×4 lumber – 12 ft
49 pieces of 2×4 lumber – 8 ft
200 pieces of 2 1/2″ screws
700 pieces of 3 1/2″ screws
6 pieces of rafter ties
1 box of 1 1/2″ “structural screws
wood filler , wood glue, stain/paint

Tools

Hammer, Tape measure, Framing square, Level

Miter saw, Drill machinery, Screwdriver, Sander

Safety Gloves, Safety Glasses

Time

One week

PART 1: 8×12 Lean to Shed Plans
PART 2: 8×12 Lean to Shed Roof Plans

How to Build a Lean to Shed 8×12

Floor frame

First of all, we need to build the floor for the shed from lumber. Cut the joists from 2×6 lumber using a good saw. Align the beams, making sure the corners are square, drill pilot holes and insert 3 1/2″ screws to lock them together tightly.

Measure the diagonals and make adjustments until they are perfectly equal. Place the joists every 16″ on center.

Fitting-the-floor-skids

After assembling the floor frame, you need to attach the 4×4 skids. Use metal connectors to secure the skids to the joists, after aligning them or toenail them. Use 2 rafter ties and 1 1/2″ structural screws for each skid, one at a time.

Floor sheets

Continue the project by attaching the 3/4″ plywood sheets to the floor frame. Leave no gaps between the floor sheets and secure them into place with 1 5/8″ screws, every 12″ along the joists.

Building the shed wall frames

Building-the-back-shed-wall

Next, we will start assembling the back wall frame for the shed. Therefore, cut all the components at the dimensions shown in the diagram, using 2×4 boards. Drill pilot holes through the top plates and insert 3 1/2″ screws into the studs. Align the edges flush and place the studs every 16″ on center. In addition, attach a double plate to the top of the wall frame.

Front-shed-wall-frame

Continue the project by assembling the front wall with the opening for the double doors. As you can notice in the diagram, you need to leave enough space for the door opening. You can easily adjust the size of the door to suit your nails.

Use 2×6 lumber for the double header. Fit a piece of 1/2″ plywood between the double beams and then add glue to the joints. Align the edges flush and insert 2 1/2″ screws from both sides to assemble the header.

However, you should notice the double studs placed at both ends of the wall frame. Fit pieces of 1/2″ plywood between the double studs.

Building-the-shed-wall-frames

Next, assemble the side wall frames. Use the same techniques described above to assemble the wall frame.

Assembling the shed framing

Fitting the front and back wall frames

Lift the front and back walls and lay them to the floor of the shed. Align the edges with attention and use a spirit level to plumb the walls. Drill pilot holes through the bottom plates and insert 3 1/2″ screws into the floor frame, every 8″. As you can notice in the plans, you need to secure the walls into place temporarily with 2×4 braces.

Assemble the shed frame

Fit the side walls to the shed floor and lock them to the adjacent walls with 3 1/2″ screws. Make sure the corners are square and insert 3 1/2″ screws through the bottom plates into the floor, as well.

Top wall frame

Next, we need to frame the top wall that will create the lean to shape for this shed. This wall is designed in such a way that it will give this shed a 3:12 pitch. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Place the studs every 16″ on center. Notice the double studs at both ends, with 1/2″ plywood pieces between them.

Fitting the top wall frame

Fit the top wall frame to the front or back walls of the storage shed. Plumb the wall with a spirit level, drill pilot holes and insert 3 1/2″ screws.

Fitting the siding sheets – back view

Use 5/8″ T1-11 siding sheets for the exterior of the storage shed. Cut the panels and align them into place. Insert 6d nails, every 8″ along the framing, to secure the panels into place.

8×12 Shed – front wall siding

Attach the siding sheets to the front of the garden shed, as well. After securing the panels into place, make the cut outs around the double doors with a circular saw.

Finishing touches

8×12 Shed – view

Make sure you check PART 2 of the project, so you learn how to build the roof for this large lean to shed project. In addition, you could check the rest of the shed plans I have on this site for more building ideas.

8x12 Shed - Lean to shed - overall dimensions

8×12 Shed – Lean to shed – overall dimensions

Last but not least, you should take care of the finishing touches. Therefore, fill the holes with wood putty and let the compound to dry out for several hours. Smooth the surface with medium-grit sandpaper along the wood grain.

DIY 8×12 lean to shed

Top Tip: Take a look over PART 2 of the project, so you learn how to build the roof and the front double doors for this shed project. If you want to get this project as a PDF file with 1 full cut list and 1 shopping list, please take a look over the GET PDF PLANS button bellow. If you want to get this project as a PDF file with 1 cut list and 1 shopping list, please take a look over the GET PDF PLANS button bellow.

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