12×12 Lean to Shed Roof Plans

This step by step diy project is about 12×12 shed roof plans. This is PART 2 of the storage shed project, where I show you how to build the lean to roof for the project. Take a look over the rest of my woodworking plans, if you want to get more building inspiration. Remember that you need to select the site for the shed with attention and that you have to comply with a few legal regulations.

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




12×12 Lean to Shed Roof Plans




[tabs tab1=”Materials” tab2=”Tools” tab3=”Time” tab4=”Related Plans”] [tab id=1]

  • F – 2 pieces of T1-11 siding – 29 1/2″x48″ long, 2 pieces – 21 1/4″x48″ long, 2 pieces – 13″x48″ long SIDING
  • G – 7 pieces of 2×6 lumber – 156″ long RAFTERS
  • G – 2 pieces of 2×4 lumber – 16″ long, 2 pieces – 7 3/4″ long SUPPORTS
  • H – 3 pieces of 3/4″ plywood – 48″x96″ long, 3 pieces – 48″x48″ long, 1 piece – 12″x96″ long, 1 piece – 12″x48″ long ROOF
  • – 2 pieces of 2×8 lumber – 148 1/4″ long, 2 pieces – 156″ long TRIMS
  • J – 200 sq ft of tar paper, 200 sq ft of asphalt shingles ROOFING

  • 7 pieces of 2×6 lumber – 14′
  • 4 pieces of 2×8 lumber – 14′
  • 1 piece of 2×4 lumber – 8′
  • 6 pieces of 3/4″ plywood – 4’x8′
  • 2 pieces of T1-11 5/8″ siding – 4’x8′
  • 200 sq ft of tar paper, 200 sq ft of asphalt shingles
  • 2 1/2″ screws, 3 1/2″ screws, 1 5/8″ screws
  • 4d nails, 16d nails, 6d nails
  • wood filler , wood glue, stain/paint

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 Hammer, Tape measure, Framing square, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses

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 One day

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Building a 12×12 lean to shed roof



First, you need to build the rafters for the lean to shed from 2×6 lumber. Therefore, mark the cut lines on the beams and then get the job done with a saw.



Fit the rafters to the top of the shed. Place the rafters equally spaced, every 24″ on center. Align the edges with attention and use rafter ties to lock the rafters into place tightly.

Fitting the side supports

Fitting the side supports

Fit 2×4 supports to the sides of the shed. Cut the supports at the right dimensions and then drill pocket holes at both ends. Insert 2 1/2″ screws to lock the supports into place tightly.

Lean to side panels

Lean to side panels

Fit T1-11 siding panels to the sides of the shed. Mark the cut lines on the sheets and then get the job done with a saw. Fit the panels into place, align the edges and insert 6-8d nails every 8″ along the framing, to lock them into place tightly.

Roof sheets

Roof sheets

Fit the 3/4″ plywood sheets to the roof of the lean to shed. Align the edges with attention and insert 1 5/8″ screws, every 8″ along the rafters.

Roof trims

Roof trims

Fit 2×8 trims to the sides of the roof. Lock them into place with 3 1/2″ screws. Fit the 2×8 trims to the front and back of the roof. Insert 3 1/2″ screws to lock the trims into place tightly.

Fitting the roofing sheets

Fitting the roofing sheets

Cover the roof with tar paper and then install the asphalt shingles. Make sure you also install the appropriate drip edges, so you can seal the shed roof. Read the manufacturer’s instructions for a tight fit.

12x12 Lean to shed Plans - side view

12×12 Lean to shed Plans – side view

Make sure you check out PART 1 of the project to learn how to build the frame of the shed. Take a look over PART 3 of the shed, so you learn how to build the double front doors.

12x12 Lean to shed Plans - back view

12×12 Lean to shed Plans – back view

This shed is easy to build, sturdy and it has a nice design. The lean to design will add charm to the property and it is super sturdy.



This woodworking project was about 12×12 lean to shed roof 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.


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  1. Robert C.
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