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Free shed plan

12x24 Shed Plans: Gable Roof

The largest plan here. The 24 ft sides are spliced over studs, joists and rafters, so nothing needs a special-order board. Check permits and setbacks before you buy lumber.

sq ft
288
boards
189
sheets
41
offcut
4.9%
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12 ft wide by 24 ft deep, 6/12 gable roof, about 11' 9-3/8" to the peak.

Specifications

Footprint12' wide x 24' deep (288 sq ft)
RoofGable, 6/12 pitch, 6" eaves
Wall height7' 4-3/4" to top of plates
Overall heightabout 11' 9-3/8" from grade to peak
Framing2x4 walls at 16" OC, 2x6 rafters at 16" OC, 2x6 joists at 16" OC
Foundation4 pressure-treated 4x6 skids on a gravel pad
Doordouble door, 48" x 78" on the front wall (rough opening)
Windows3 x 24" x 24" rough opening
Longest board16 ft, longer members spliced over supports
Design snow load30 psf

Notes on this design

Where the long members are spliced

  • Left side wall: plates spliced over a stud at 129-3/4", cap plate at 192" from the left end.
  • Right side wall: plates spliced over a stud at 129-3/4", cap plate at 192" from the left end.
  • Ridge board: joint centered on a rafter pair at 144" from the front.
  • Skids: butt joints at 144", 192" from the front, staggered from skid to skid, each with a 4 ft 2x6 splice plate on both faces.
  • Rim joists: joint centered on a joist at 144" from the front; double that joist.
  • Fascia: butt joints centered on a rafter tail at 144", with a 3/16" gap, sealed, and two nails each side of the joint.

Foundation and floor

4 pressure-treated 4x6 skids run front to back on a compacted gravel pad. The floor joists run across them, so no joist spans more than 46-13/16". See the foundation guide for leveling and squaring.

12' wide24' deepFRONT
Floor framing from above: 19 joists at 16" on center between two rim joists. Skids dashed.

Wall framing

Walls are drawn from the outside. The side walls run the full depth and carry the rafters; the front and back gable walls fit between them. The wall framing guide walks through layout and raising.

DOOR48" x 78"Header 2-2x644-1/2"92-1/2"41-1/2"0"11-3/4"27-3/4"107-3/4"123-3/4"135-1/2"11' 5" long, studs 84-1/4"7' 4-3/4"door head 78"
Front wall: 11' 5" long, 8 full studs at 84-1/4". Tick marks under the wall are stud positions from the left end.

Front wall: layout marks

Marked from the left end of the bottom plate as drawn, heights from the subfloor.
Studs, left edge0", 11-3/4", 27-3/4", 41-1/2", 43", 92-1/2", 94", 107-3/4", 123-3/4", 135-1/2"
Door rough opening44-1/2" to 92-1/2" from the left end (48" wide)
Door header2-2x6, bottom at 78", top at 83-1/2" above the subfloor
WINDOW24" x 24"Header 2-2x656-1/2"80-1/2"53-1/2"0"11-3/4"27-3/4"43-3/4"91-3/4"107-3/4"123-3/4"135-1/2"11' 5" long, studs 84-1/4"7' 4-3/4"sill 54"window head 78"
Back wall: 11' 5" long, 10 full studs at 84-1/4". Tick marks under the wall are stud positions from the left end.

Back wall: layout marks

Marked from the left end of the bottom plate as drawn, heights from the subfloor.
Studs, left edge0", 11-3/4", 27-3/4", 43-3/4", 53-1/2", 55", 80-1/2", 82", 91-3/4", 107-3/4", 123-3/4", 135-1/2"
Window rough opening56-1/2" to 80-1/2" from the left end (24" wide)
Window silltop of the rough sill at 54" above the subfloor
Window header2-2x6, bottom at 78", top at 83-1/2" above the subfloor
WINDOW24"x 24"2-2x6132"156"0"15-1/4"31-1/4"47-1/4"63-1/4"79-1/4"95-1/4"111-1/4"175-1/4"191-1/4"207-1/4"223-1/4"239-1/4"255-1/4"271-1/4"286-1/2"24' long, studs 84-1/4"7' 4-3/4"sill 54"window head 78"
Left side wall: 24' long, 22 full studs at 84-1/4". Tick marks under the wall are stud positions from the left end.

Left side wall: layout marks

Marked from the left end of the bottom plate as drawn, heights from the subfloor.
Studs, left edge0", 1-1/2", 15-1/4", 31-1/4", 47-1/4", 63-1/4", 79-1/4", 95-1/4", 111-1/4", 127-1/4", 129", 130-1/2", 156", 157-1/2", 159-1/4", 175-1/4", 191-1/4", 207-1/4", 223-1/4", 239-1/4", 255-1/4", 271-1/4", 285", 286-1/2"
Window rough opening132" to 156" from the left end (24" wide)
Window silltop of the rough sill at 54" above the subfloor
Window header2-2x6, bottom at 78", top at 83-1/2" above the subfloor
WINDOW24"x 24"2-2x6132"156"0"15-1/4"31-1/4"47-1/4"63-1/4"79-1/4"95-1/4"111-1/4"175-1/4"191-1/4"207-1/4"223-1/4"239-1/4"255-1/4"271-1/4"286-1/2"24' long, studs 84-1/4"7' 4-3/4"sill 54"window head 78"
Right side wall: 24' long, 22 full studs at 84-1/4". Tick marks under the wall are stud positions from the left end.

Right side wall: layout marks

Marked from the left end of the bottom plate as drawn, heights from the subfloor.
Studs, left edge0", 1-1/2", 15-1/4", 31-1/4", 47-1/4", 63-1/4", 79-1/4", 95-1/4", 111-1/4", 127-1/4", 129", 130-1/2", 156", 157-1/2", 159-1/4", 175-1/4", 191-1/4", 207-1/4", 223-1/4", 239-1/4", 255-1/4", 271-1/4", 285", 286-1/2"
Window rough opening132" to 156" from the left end (24" wide)
Window silltop of the rough sill at 54" above the subfloor
Window header2-2x6, bottom at 78", top at 83-1/2" above the subfloor

Roof framing

38 2x6 rafters at 16" on center, 6/12 pitch with a 6" eave. A 2x8 ridge board and a 2x4 rafter tie at every pair keep the walls from spreading. The rafter guide shows how to lay out the pattern.

86-3/8" along the edge, plumb cut to plumb cut77-1/4" horizontal run6" tailseat 3-1/2", heel 1-3/4"6/12 plumb cuts (26.6°)
Pattern rafter: 2x6 x 89-1/8" stock, 86-3/8" plumb cut to plumb cut, birdsmouth seat 3-1/2" with a 1-3/4" heel.

Span checks

MemberSizeSpanAllowedResult
Rafters2x65' 11-1/4"11' 11-1/8"bendingOK, 101% spare
Floor joists2x63' 10-13/16"8' 7-13/16"deflectionOK, 122% spare
Window header, left side wall2-2x62' 3"7' 1-1/2"bendingOK, 217% spare
Window header, right side wall2-2x62' 3"7' 1-1/2"bendingOK, 217% spare

Checked for Spruce-Pine-Fir No. 2 with NDS design values, 30 psf snow plus 10 psf dead load, L/180 deflection for rafters. Use a heavier snow load in the designer if your area needs it.

Shopping list

Lumber to buyQty
4x6 pressure-treated (ground contact)
8 ft2
12 ft4
16 ft2
2x6 pressure-treated (ground contact)
12 ft16
16 ft8
2x4 framing lumber
8 ft58
12 ft27
16 ft16
2x6 framing lumber
8 ft33
12 ft5
2x8 framing lumber
12 ft2
1x4 exterior trim board
8 ft12
1x6 exterior trim board
12 ft4
Sheets, roofing and hardwareBuy
Sheet goods
3/4" tongue-and-groove plywood subfloor, 4x8long edge across the joists, end joints staggered9 sheets
Panel siding (T1-11 or engineered wood), 4x8one panel covers the floor frame and the wall, no horizontal joint18 sheets
Panel siding for the gable ends, 4x8triangles nest; includes 15% for angled cuts2 sheets
7/16" OSB roof sheathing, 4x8use H-clips between rafters at unsupported edges12 sheets
Z-flashing for the horizontal siding joints, 10 ft pieces24' of horizontal joint at the top plate under the gables; leave a 3/8" gap above it3 pieces
Roofing
Asphalt shingles, 3 bundles per square3.49 squares plus 10% waste12 bundles
Starter strip shingles48 lin ft along the eaves, counted at 100 lin ft per bundle; check the label1 bundle
Hip and ridge cap shingles24 lin ft of ridge, counted at 20 lin ft per bundle; check the label2 bundles
Synthetic roof underlayment, 10-square roll4.0 squares with laps1 roll
Drip edge, 10 ft pieceseaves and rakes9 pieces
Fasteners and hardware
Framing nails, 16d common, 3-1/2" x 0.162"about 1,050 nails at about 47 per lb; counted joint by joint to the IRC fastening schedule (2 per stud end, 3 per joist end), 15% spare included23 lb
Toenail nails, 10d box, 3" x 0.128"about 900 nails at about 94 per lb; for the toenailed joints: rafters to plates and ridge, joists to skids, gable studs; 15% spare included10 lb
Galvanized siding nails, 2-1/2" (8d)about 1,500 nails at about 90 per lb; 6" on edges, 12" in the field17 lb
Roof sheathing nails, 2-1/2" (8d)about 750 nails at about 90 per lb; 6" on edges, 12" in the field9 lb
Exterior screws for the subfloor, 2"about 450 screws at about 100 per lb; about 50 per sheet5 lb
Rafter-to-plate connectors (hurricane ties)one at every rafter bearing, fixed with the nails its label calls for38
Roofing nails, 1-1/4"about 1,250 nails at about 140 per lb; 4 per shingle, about 320 per square9 lb
Exterior screws for splice plates, 3"64 screws in boxes of 100, 8 per plate1 box
Construction adhesive (subfloor)one tube per 2 sheets5 tubes
Shed ground anchorsone near each corner; check local wind rules4

Lumber-yard takeoff

The whole shopping list on one printed page, with a box to tick for each line at the yard.

12x24 Gable Shed plan: lumber-yard takeoff

12' x 24' gable, 6/12 roof. Tick each line as it goes on the cart. theshedplanner.com

Lumber

  • 24x6 pressure-treated (ground contact), 8 ft
  • 44x6 pressure-treated (ground contact), 12 ft
  • 24x6 pressure-treated (ground contact), 16 ft
  • 162x6 pressure-treated (ground contact), 12 ft
  • 82x6 pressure-treated (ground contact), 16 ft
  • 582x4 framing lumber, 8 ft
  • 272x4 framing lumber, 12 ft
  • 162x4 framing lumber, 16 ft
  • 332x6 framing lumber, 8 ft
  • 52x6 framing lumber, 12 ft
  • 22x8 framing lumber, 12 ft
  • 121x4 exterior trim board, 8 ft
  • 41x6 exterior trim board, 12 ft

Sheet goods

  • 9 sheets3/4" tongue-and-groove plywood subfloor, 4x8
  • 18 sheetsPanel siding (T1-11 or engineered wood), 4x8
  • 2 sheetsPanel siding for the gable ends, 4x8
  • 12 sheets7/16" OSB roof sheathing, 4x8
  • 3 piecesZ-flashing for the horizontal siding joints, 10 ft pieces

Roofing

  • 12 bundlesAsphalt shingles, 3 bundles per square
  • 1 bundleStarter strip shingles
  • 2 bundlesHip and ridge cap shingles
  • 1 rollSynthetic roof underlayment, 10-square roll
  • 9 piecesDrip edge, 10 ft pieces

Fasteners and hardware

  • 23 lbFraming nails, 16d common, 3-1/2" x 0.162"
  • 10 lbToenail nails, 10d box, 3" x 0.128"
  • 17 lbGalvanized siding nails, 2-1/2" (8d)
  • 9 lbRoof sheathing nails, 2-1/2" (8d)
  • 5 lbExterior screws for the subfloor, 2"
  • 38Rafter-to-plate connectors (hurricane ties)
  • 9 lbRoofing nails, 1-1/4"
  • 1 boxExterior screws for splice plates, 3"
  • 5 tubesConstruction adhesive (subfloor)
  • 4Shed ground anchors

Foundation

  • 1 rollLandscape fabric, enough to cover 14' x 26'

Site prep

  • 4.5 cu ydGravel base: compactable crushed stone, 4" pad 1 ft wider than the shed on every side, before compactionBagged at Home Depot, Hamilton Mill store (ZIP 30011), Sep 30, 2026: $1,572.21 (243 bags of 0.5 cu ft at $6.47). Bulk from a landscape or building supplier is typically cheaper: East Coast Lumber & Building Supply (East Hampstead, NH) listed 3/4 in crushed stone at $69.95 per cubic yard on Sep 30, 2026, delivered in loads of 3 to 8 yards. Site prep, not in the shed materials total.

Cut list

QtySizeLengthPiece
Front wall
22x476-1/2"Jack stud, door
22x651"Header ply, door (48" opening)
22x42-1/4"Cripple above door header
82x484-1/4"Stud
22x4137"Bottom and top plate
12x4144"Cap plate (second top plate)
22x46-5/8"Gable stud (long point)
22x414-5/8"Gable stud (long point)
22x422-5/8"Gable stud (long point)
22x430-5/8"Gable stud (long point)
Back wall
22x476-1/2"Jack stud, window
22x627"Header ply, window (24" opening)
22x42-1/4"Cripple above window header
12x424"Rough sill, window
22x451"Cripple below window sill
102x484-1/4"Stud
22x4137"Bottom and top plate
12x4144"Cap plate (second top plate)
22x46-5/8"Gable stud (long point)
22x414-5/8"Gable stud (long point)
22x422-5/8"Gable stud (long point)
22x430-5/8"Gable stud (long point)
Left side wall
22x476-1/2"Jack stud, window
22x627"Header ply, window (24" opening)
12x42-1/4"Cripple above window header
12x424"Rough sill, window
12x451"Cripple below window sill
222x484-1/4"Studincludes 2 corner backer studs
22x4129-3/4"Bottom and top platespliced: joints centered on a stud
22x4158-1/4"Bottom and top platespliced: joints centered on a stud
12x4188-1/2"Cap plate (second top plate)joints at least 4 ft from the top plate joints
12x492-1/2"Cap plate (second top plate)joints at least 4 ft from the top plate joints
Right side wall
22x476-1/2"Jack stud, window
22x627"Header ply, window (24" opening)
12x42-1/4"Cripple above window header
12x424"Rough sill, window
12x451"Cripple below window sill
222x484-1/4"Studincludes 2 corner backer studs
22x4129-3/4"Bottom and top platespliced: joints centered on a stud
22x4158-1/4"Bottom and top platespliced: joints centered on a stud
12x4188-1/2"Cap plate (second top plate)joints at least 4 ft from the top plate joints
12x492-1/2"Cap plate (second top plate)joints at least 4 ft from the top plate joints
Roof
382x689-1/8"Common rafter
22x8144"Ridge boardspliced: joint centered on a rafter pair
192x4144"Rafter tie (ends cut to roof slope)
Floor
44x6 PT144"Skid (runs front to back)spliced: joints staggered from skid to skid
82x6 PT48"Skid splice plate (one each side of a joint)
24x6 PT192"Skid (runs front to back)spliced: joints staggered from skid to skid
24x6 PT96"Skid (runs front to back)spliced: joints staggered from skid to skid
192x6 PT141"Floor joist
42x6 PT144"Rim joist (sides)spliced: joint centered on a doubled joist
12x6 PT141"Doubled joist at a rim joint
Trim
81x496"Corner trim board
41x6144"Fascia board (eaves)spliced: butt joint over a rafter tail, 3/16" gap, sealed
41x487-3/16"Rake trim board

Build it in 7 steps

  1. 1

    Check permits and pick the site

    Confirm what your building department and zoning rules require for a 288 sq ft shed, then call 811 before you dig. Read the guide

  2. 2

    Build the foundation

    Level a gravel pad 1 ft wider than the shed and set 4 pressure-treated 4x6 skids 46-13/16" on center. Read the guide

  3. 3

    Frame the floor

    Two 24' rim joists and 19 joists at 141", 16" on center, squared by the diagonals and covered with 3/4" tongue-and-groove plywood.

  4. 4

    Frame and raise the walls

    Build each wall flat with 84-1/4" studs, headers over the openings and a double top plate. Raise, plumb and brace. Read the guide

  5. 5

    Cut and set the rafters

    Make one pattern 2x6 rafter, 86-3/8" plumb cut to plumb cut, test it, then cut 37 more. Set the 2x8 ridge and add a 2x4 rafter tie at every pair. Read the guide

  6. 6

    Sheathe and roof

    Nail 12 sheets of 7/16" OSB, add drip edge and underlayment, then shingles.

  7. 7

    Side and trim

    Hang the panel siding, then the corner boards, fascia and rake trim. Fit the doors and windows and seal every cut edge.

Guides for this build

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