How to Build a Storage Lean-To

Written by katherine kally
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You can build a storage lean-to with recycled lumber and tin sheeting, creating a simple, covered space to store wood, equipment and other outdoor materials. The instructions here are for an 8-foot-long, 6-foot-wide and 6-foot-tall lean-to, built against one wall of an existing structure; the roof slopes to a height of 5 feet on one side. The front and the back of this storage lean-to are open, but you could enclose one or both sides. You can buy new materials for this project at a home-improvement store or check with local building-material recyclers for deals on discounted lumber and metal.

Skill level:

Things you need

  • Measuring tape
  • Two 6-inch-by-6-inch treated wood posts, 6-feet-long
  • Two 6-inch-by-6-inch treated wood posts, 5-feet-long
  • Post-hole digger
  • Quikrete cement mix
  • Gravel
  • Four wood stakes
  • Builder's string
  • Two 2-inch-by-4-inch treated wood planks, 8-feet-long
  • Screwdriver
  • Wood screws
  • Six 2-inch-by-4-inch treated wood planks, 6-feet-long
  • Three 2-inch-by-4-inch treated wood planks, 5-feet-long
  • Two 4-inch-by-4-inch treated wood posts, 6-feet-long
  • Two 4-inch-by-4-inch treated wood posts, 8-feet-long
  • Roll of metal sheeting
  • Tin snips
  • Hammer
  • Roofing nails

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  1. 1

    Begin at a corner of one side of your existing building and measure six feet out to the side. Mark the spot. On the same side of the building, measure 6-feet out from the other corner and 8-feet away from the first mark. Also mark this spot. Using the posthole digger, dig an 18-inch hole on each of the marks and also at each corner of the building.

  2. 2

    Place a handful of gravel in each hole, so the posts are not standing directly on the ground. Stand the 6-foot posts in the holes adjacent to the building and the 5-foot posts in the holes away from the building. Stake the 5-foot posts straight with wooden stakes and builder's string. Place the stakes in the ground about 12-inches on either side of the posts. Wrap the string around the post and the stakes. You do not need to stake the posts next to the building. Mix the Quikrete and fill the holes around the posts. Let it dry.

  3. 3

    Attach an 8-foot treated wood plank between the two 5-foot posts at the base with wood screws. This provides stability for the storage lean-to and gives you a place to secure the wall planks. Attach the other 8-foot treated wood plank at the base between the 6-foot posts against the building wall.

  4. 4

    Attach three 6-foot treated wood planks to the 8-foot treated wood plank at the base between the 6-foot posts against the building wall. Place a post every two feet. Repeat this step on the opposite wall with the 5-foot treated wood planks. These are your wall supports.

  5. 5

    Attach the 6-foot treated wood posts from the top of the corner posts against the building to the 5-foot corner posts. Attach the 8-foot treated wood posts between the 6-foot corner posts next to the building and between the two 5-foot corner posts.

  6. 6

    Attach one 6-foot treated wood plank between each of the wall supports at the top to create a roof structure.

  7. 7

    Cover the top and the one wall structure with metal sheeting. Cut the strips with tin snips to fit the length of the roof and the height of the side, then attach the metal to the wood structure with a hammer and roofing nails.

Tips and warnings

  • Always use treated wood for any outdoor project.
  • Wet cement can burn your skin. Wear protective clothing.

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