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10×12 Enclosed Lean-To Storage Shed Plans

The fully enclosed version of the 10×12 lean-to shed, including wall infill and roof gap covers. Every framing member is listed with its exact length and roof angle cuts.

144″ W × 120″ D × 106″ H48 pieces99 screwsGarden
Open & customize in 3D (free)→Sample PDF plan
3D model of the 10×12 lean-to shed (enclosed)
12′ × 10′ backyard storage shed with fully enclosed walls: 2x6 floor framing, 4x4 corner posts, 2x4 wall studs, 60″ double-door opening, sloped rafters, and full roof gap infill covers.

Cut list

Identical pieces are grouped. Lengths are finished lengths in inches.

QtyMaterialSizeCutsPieces
2×2x6144″Square (90°)Rim Joists
5×2x6117″Square (90°)Floor Joists
2×plywood60″ × 144″ (0.75″ thick)Square (90°)Floor Decks
2×4x491.5″Square (90°)Corner Posts
2×4x475.5″Square (90°)Corner Posts
3×2x4135.5″Square (90°)Sill Plate2× Plates
4×2x4111.5″Square (90°)2× Sill Plates2× Plates
2×2x436.3″Square (90°)Sills
4×2x469″Square (90°)Studs
2×2x486.5″Square (90°)Door King Studs
1×2x660″Square (90°)Double Door Header
1×plywood144″ × 72″ (0.75″ thick)Square (90°)Wall Sheathing
2×plywood118.5″ × 72″ (0.75″ thick)Square (90°)Wall Sheathings
2×plywood42″ × 88″ (0.75″ thick)Square (90°)Wall Panels
1×plywood60″ × 7″ (0.75″ thick)Square (90°)Transom Panel
5×2x4125″7.9° miter (both ends)2× End Rafters3× Rafters
2×2x4144″Square (90°)Roof Fascias
2×plywood64″ × 144″ (0.75″ thick)Square (90°)Roof Decks
2×plywood118.5″ × 20.4″ (0.75″ thick)7.92° miter (Start)Gable Sheathings
1×plywood144″ × 4.4″ (0.75″ thick)Square (90°)Clerestory Infill Panel
1×plywood144″ × 3.8″ (0.75″ thick)Square (90°)Eave Infill Panel

Lumber shopping list

Board counts are optimized from standard stock lengths and include a 1/8″ saw kerf per cut.

Tools you need

Assembly steps

  1. Floor Joist Frame
    2× Rim Joist (2x6, 144″) 5× Floor Joist (2x6, 117″)
  2. Plywood Floor Deck
    2× Floor Deck (plywood, 60″ × 144″)
  3. Corner Posts & Sill Plates
    2× Corner Post (4x4, 91.5″) 2× Corner Post (4x4, 75.5″) 1× Back Sill Plate (2x4, 135.5″) 2× Sill Plate (2x4, 111.5″) 2× Sill (2x4, 36.3″)
  4. Back & Side Wall Framing
    1× Back Top Plate (2x4, 135.5″) 4× Stud (2x4, 69″) 2× Top Plate (2x4, 111.5″)
  5. Front Doorway Framing
    1× Front Top Plate (2x4, 135.5″) 2× Door King Stud (2x4, 86.5″) 1× Double Door Header (2x6, 60″)
  6. Exterior Wall Sheathing
    1× Back Wall Sheathing (plywood, 144″ × 72″) 2× Wall Sheathing (plywood, 118.5″ × 72″) 2× Wall Panel (plywood, 42″ × 88″) 1× Front Transom Panel (plywood, 60″ × 7″) 2× Gable Sheathing (plywood, 118.5″ × 20.4″, 7.92° miter (Start)) 1× Front Clerestory Infill Panel (plywood, 144″ × 4.4″) 1× Back Eave Infill Panel (plywood, 144″ × 3.8″)
  7. Angled Roof Rafters & Fascia
    5× Rafter (2x4, 125″, 7.9° miter (both ends)) 2× Roof Fascia (2x4, 144″)
  8. Plywood Roof Deck
    2× Roof Deck (plywood, 64″ × 144″)
Want 3D diagrams for every step, board cutting layouts and screw placements? Open this plan in BenchBuild to modify the 3D model, change any dimensions or add pieces, and your cut list updates instantly.

FAQ

How much lumber do I need for this 10×12 lean-to shed (enclosed)?

2× 2x6 × 12′, 5× 2x6 × 10′, 1× 2x6 × 8′, 4× 4x4 × 8′, 10× 2x4 × 12′, 4× 2x4 × 10′, 7× 2x4 × 8′, 14 plywood / sheet panels (sizes in the cut list). That is 33 boards in total, optimized from standard stock lengths with a 1/8″ saw kerf.

What screws should I use?

The plan uses 99 wood screws (2-1/2″, 2″). Use exterior-rated screws for outdoor builds.

Can I customize or modify this plan?

Yes. Open it in the free BenchBuild 3D studio to freely modify the model, resize parts, add pieces, or change lumber dimensions. Your cut list, board count and cost estimate update automatically.

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