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10×12 Lean-To Shed Plans with Mini-Carport

Pro 10×12 enclosed lean-to shed with 16″ on-center wall studs, framed side window rough opening, front double doors, and outdoor covered carport roof extension.

192″ W × 120″ D × 106″ H96 pieces177 screwsGardenPRO PLAN
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3D model of the 10×12 lean-to shed with mini-carport
10′ × 12′ fully enclosed backyard shed with 16″ on-center wall studs, framed side window opening, 60″ front double door, gable and roof gap infill panels, and outdoor 4-ft covered carport roof extension.

Cut list

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

QtyMaterialSizeCutsPieces
2×2x6144″Square (90°)Rim Joists
9×2x6117″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
20×2x469″Square (90°)Stud (″ OC)s
4×2x4111.5″Square (90°)2× Sill Plates2× Plates
1×2x415.7″Square (90°)Sill
3×2x485″Square (90°)Stud (″ OC)2× Window King Studs
2×2x486.5″Square (90°)Door King Studs
1×2x660″Square (90°)Double Door Header
1×2x458.3″Square (90°)Sill
2×2x459″Square (90°)Window Jack Studs
1×2x635″Square (90°)Window Header (Double 2x6 Beam)
1×2x432″Square (90°)Window Rough Sill
1×2x427″Square (90°)Window Sill Cripple Stud
1×2x420.5″Square (90°)Window Header Cripple Stud
1×plywood144″ × 72″ (0.75″ thick)Square (90°)Wall Sheathing
2×plywood118.5″ × 72″ (0.75″ thick)Square (90°)Wall Sheathings
1×plywood20″ × 88″ (0.75″ thick)Square (90°)Wall Panel ( Of Door)
2×plywood16″ × 88″ (0.75″ thick)Square (90°)Wall Panel (Between Door & Window)Wall Panel ( Of Window)
1×plywood32″ × 30″ (0.75″ thick)Square (90°)Wall Panel (Under Window)
1×plywood32″ × 22″ (0.75″ thick)Square (90°)Wall Panel (Over Window)
1×plywood60″ × 7″ (0.75″ thick)Square (90°)Doorway Transom Panel
12×2x4125″Square (90°)End Rafter6× Roof RaftersRafterShed Rafter (Carport Tie)2× Carport RaftersCarport End Rafter
2×2x4144″Square (90°)Roof Fascias
2×plywood64″ × 144″ (0.75″ thick)Square (90°)Roof Decks
1×4x478.9″Square (90°)Carport Support Post ()
1×4x494.8″Square (90°)Carport Support Post ()
1×2x6125″Square (90°)Carport Support Header Beam
2×2x448″Square (90°)Carport Fascias
2×plywood64″ × 48″ (0.75″ thick)Square (90°)Carport Roof Canopy ()s
2×plywood118.5″ × 20.4″ (0.75″ thick)7.92° miter (Start)Gable Infill 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
2×2x41.5″Square (90°)Carport Header Ties

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″) 9× 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″) 1× Front Sill Left (2x4, 15.7″) 1× Front Sill Right (2x4, 58.3″)
  4. Back Wall Framing (16in OC)
    1× Back Top Plate (2x4, 135.5″) 1× Back Stud 1 (16″ OC) (2x4, 69″) 1× Back Stud 2 (16″ OC) (2x4, 69″) 1× Back Stud 3 (16″ OC) (2x4, 69″) 1× Back Stud 4 (16″ OC) (2x4, 69″) 1× Back Stud 5 (16″ OC) (2x4, 69″) 1× Back Stud 6 (16″ OC) (2x4, 69″) 1× Back Stud 7 (16″ OC) (2x4, 69″) 1× Back Stud 8 (16″ OC) (2x4, 69″)
  5. Left Wall Framing (16in OC)
    1× Left Top Plate (2x4, 111.5″) 1× Left Stud 1 (16″ OC) (2x4, 69″) 1× Left Stud 2 (16″ OC) (2x4, 69″) 1× Left Stud 3 (16″ OC) (2x4, 69″) 1× Left Stud 4 (16″ OC) (2x4, 69″) 1× Left Stud 5 (16″ OC) (2x4, 69″) 1× Left Stud 6 (16″ OC) (2x4, 69″)
  6. Right Wall Framing (16in OC)
    1× Right Top Plate (2x4, 111.5″) 1× Right Stud 1 (16″ OC) (2x4, 69″) 1× Right Stud 2 (16″ OC) (2x4, 69″) 1× Right Stud 3 (16″ OC) (2x4, 69″) 1× Right Stud 4 (16″ OC) (2x4, 69″) 1× Right Stud 5 (16″ OC) (2x4, 69″) 1× Right Stud 6 (16″ OC) (2x4, 69″)
  7. Front Doorway & Window Framing
    1× Front Top Plate (2x4, 135.5″) 1× Front Left Stud (16″ OC) (2x4, 85″) 2× Door King Stud (2x4, 86.5″) 1× Double Door Header (2x6, 60″) 2× Window King Stud (2x4, 85″) 2× Window Jack Stud (2x4, 59″) 1× Window Header (Double 2x6 Beam) (2x6, 35″) 1× Window Rough Sill (2x4, 32″) 1× Window Sill Cripple Stud (2x4, 27″) 1× Window Header Cripple Stud (2x4, 20.5″)
  8. Exterior Wall Sheathing
    1× Back Wall Sheathing (plywood, 144″ × 72″) 2× Wall Sheathing (plywood, 118.5″ × 72″) 1× Front Wall Panel (Left of Door) (plywood, 20″ × 88″) 1× Front Wall Panel (Between Door & Window) (plywood, 16″ × 88″) 1× Front Wall Panel (Right of Window) (plywood, 16″ × 88″) 1× Front Wall Panel (Under Window) (plywood, 32″ × 30″) 1× Front Wall Panel (Over Window) (plywood, 32″ × 22″) 1× Front Doorway Transom Panel (plywood, 60″ × 7″) 2× Gable Infill 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″)
  9. Angled Roof Rafters & Fascia
    2× Rafter (2x4, 125″) 6× Roof Rafter (2x4, 125″) 1× Shed Right Rafter (Carport Tie) (2x4, 125″) 2× Roof Fascia (2x4, 144″)
  10. Plywood Roof Deck
    2× Roof Deck (plywood, 64″ × 144″)
  11. Outdoor Carport & Covered Extension
    1× Carport Support Post (Back) (4x4, 78.9″) 1× Carport Support Post (Front) (4x4, 94.8″) 1× Carport Support Header Beam (2x6, 125″) 2× Carport Rafter (2x4, 125″) 1× Carport Outer End Rafter (2x4, 125″) 2× Carport Fascia (2x4, 48″) 2× Carport Roof Canopy () (plywood, 64″ × 48″) 2× Carport Header Tie (2x4, 1.5″)
Want 3D diagrams for every step, board cutting layouts and screw placements? Open this plan in BenchBuild with Pro 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 with mini-carport?

3× 2x6 × 12′, 9× 2x6 × 10′, 1× 2x6 × 8′, 6× 4x4 × 8′, 17× 2x4 × 12′, 4× 2x4 × 10′, 30× 2x4 × 8′, 19 plywood / sheet panels (sizes in the cut list). That is 70 boards in total, optimized from standard stock lengths with a 1/8″ saw kerf.

What screws should I use?

The plan uses 177 wood screws (2-1/2″, 3″, 6″, 2″). Use exterior-rated screws for outdoor builds.

Can I customize or modify this plan?

Yes. The complete cut list and materials are viewable here for free. To open, customize and resize this 3D model in the BenchBuild Studio, a Pro subscription is required.

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