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144 sq ft · free & unbiased

12×12 Shed Material List

A 12×12 gives you a square 144 square feet with noticeably more elbow room than a 10×10. The wider span makes it a favorite for anyone who wants the shed to double as a hobby space or she-shed rather than pure storage.

How much lumber for a 12×12 shed?

Here's a shopping-ready estimate for a standard 12×12 build — 8 ft walls, studs 16" on-centre, 3-stud corners, one door and a 4/12 gable roof — with a 10% waste factor already included.

2×4 boards

94

4×8 sheets

20

Roof area

152 sq ft

Wall & roof framing

  • 2×4 wall studs (8 ft)

    36 field studs (perimeter ÷ 16" spacing) + 12 corner studs (3-stud corners) + 4 for 1 door & 0 windows

    58 boards

  • 2×4 plates (12 ft)

    144 linear ft (bottom + double top plate) ÷ 12 ft

    14 boards

  • 2×4 roof rafters (8 ft)

    20 rafters (2 planes × rows at 16" spacing)

    22 boards

Sheet goods

  • Siding / wall sheathing (4×8)

    384 sq ft of wall ÷ 32 sq ft per sheet

    14 sheets

  • Roof sheathing (4×8)

    152 sq ft of roof ÷ 32 sq ft per sheet

    6 sheets

Roofing

  • Roof area

    footprint 144 sq ft × 1.054 slope factor

    152 sq ft

  • Shingle bundles (~3 / square)

    1.52 squares × 3 bundles

    6 bundles

How these numbers are worked out

  • Perimeter of 48 ft with studs at 16" on-centre.
  • 3-stud (California) corners at all 4 corners.
  • Openings framed explicitly: +4 studs per door, +6 per window (1 door, 0 windows).
  • Walls: one bottom plate + a double top plate (3 × perimeter of 2×4 stock).
  • Sheet goods are 4 ft × 8 ft (32 sq ft each).
  • Gable roof at 4/12 pitch → 1.054× the flat footprint.
  • Asphalt shingles at 3 bundles per 100 sq ft "square".
  • A 10% waste factor is added, then each quantity is rounded up.

Building a different spec?

Change the wall height, stud spacing, roof pitch, corners, doors, and windows — and copy or print the list — in the full calculator.

Open the Material Calculator

What fits in a 12×12 shed

A roomy square shed for a workshop or hobby room.

  • A central workbench with room to walk all the way around
  • Wall storage on all four sides
  • A riding mower plus hand tools
  • A small hobby, craft, or potting setup

Tips for a 12×12 build

  • The wider 12-ft walls suit a window for natural light if you'll actually spend time working in there.
  • 144 sq ft is firmly in permit territory for most areas — budget time for the approval step.

Questions

12×12 shed FAQ

Straight answers on materials, capacity, permits, and cost for a 12×12 shed.

How much lumber do I need for a 12×12 shed?
For a 12×12 shed with 8 ft walls, studs at 16 inches on-centre, 3-stud corners, one door and a 4/12 roof, this calculator estimates about 58 2×4 studs, 14 boards of 2×4 plate stock and 22 roof rafters, plus roughly 14 sheets of 4×8 siding, 6 sheets of roof sheathing and 6 bundles of shingles. Those figures already include a 10% waste allowance. Adjust the spacing, pitch or openings in the calculator to match your exact design.
What can you fit in a 12×12 shed?
A 12×12 shed gives you 144 square feet. It comfortably holds a central workbench with room to walk all the way around, wall storage on all four sides, a riding mower plus hand tools, a small hobby, craft, or potting setup. A roomy square shed for a workshop or hobby room.
Do I need a permit for a 12×12 shed?
It depends on where you live. At 144 square feet, a 12×12 shed is large enough that many areas require a building permit, but the rules also consider height, foundation, and how close the shed sits to property lines. Always confirm with your local building department before you start — thresholds vary from one place to the next.
How much does a 12×12 shed cost to build?
The material cost depends on your siding, roofing, foundation, and finishes, and labour varies widely by region — so a single figure would be misleading. Use the material list here as your starting quantities, add local prices, and treat the total as a planning estimate rather than a fixed quote.

Compare other shed sizes

Material lists for more common footprints.

4×6

24 sq ft

8×8

64 sq ft

8×10

80 sq ft

8×12

96 sq ft

10×10

100 sq ft

10×12

120 sq ft

See all shed sizes