8x12 Lean-To Shed Plans

A 8x12 lean-to shed gives you 96 square feet of storage and costs from $3,551 in materials. The plans for this exact size: every cut, every board to buy, 16 build steps in 3D and printable drawings.

An 8x12 lean-to with a 12-foot front

Here width means left to right when you face the front door. Depth runs from front to back. The size label describes the footprint; it does not specify which wall faces you.

This preset is 12 feet wide and 8 feet deep: 96 square feet. Its front door is in the high wall; the roof falls toward the low back wall across the 8-foot depth. It is a freestanding shed on its own foundation, not a design for attaching to your house.

The alternate 8-foot front and 12-foot depth below uses a 2/12 pitch instead of this page’s 3/12, so its tall front wall still fits a 10-foot stud. That changes two things at once, so the difference in cost isn’t down to the orientation alone.

Open this exact configuration or try the alternate orientation. Each link recalculates its own materials; do not reuse one layout’s shopping list for the other.

Both include a framed floor, wall and roof materials, siding, roofing, door hardware, fasteners and finishing. They share treated skids on gravel, LP SmartSide siding, asphalt shingles, moderate snow setting, 6-inch overhang, a front double door (62 × 80-inch rough opening) and one 24 × 36-inch window on the right wall. No structural approval is implied.

Estimates use built-in 2025–26 US prices and exclude optional items, labor, tools, permits, tax and delivery. Check local wind/snow loads, setbacks, permits and foundation requirements with your building department or a qualified professional. For the roof-style decision, see the controlled gable versus lean-to comparison.

Materials list

The free shopping list for this 8x12 lean-to shed as shown, with LP SmartSide siding and asphalt shingles: $3,551. 49 items, 105 boards and 22 sheets.

Prices are typical US big-box estimates and vary by region and season. Check your local store.

What a 8x12 shed costs to build with each siding and roof, and where the money goes

Before you build a 8x12

• Weight: about 2,480 to 3,190 lb empty, without its foundation. How much a shed weighs, size by size
• Permit: 96 sq ft, inside both model-code exemptions (120 and 200 sq ft), though your town has the final say. Do you need a permit for a shed?
• Base: a 14' x 10' gravel pad 4 inches deep, about 2 cu yd of stone (2.7 tons), under 3 PT 4x6 skids. Shed foundation options
• Floor: PT 2x6 joists at 16" on center. Floor joist sizes, spacing and spans
• Roof: 3/12 pitch (14°). Shed roof pitch chart

Not sure a 8x12 is the right size? What size shed do I need compares all 26 sizes.

Similar sizes

• 8x12 Gable Shed plans
  96 sq ft · from $3,670
• 10x10 Lean-To Shed plans
  100 sq ft · from $3,705
• 8x10 Lean-To Shed plans
  80 sq ft · from $3,401
• 10x12 Lean-To Shed plans
  120 sq ft · from $3,895
• 8x8 Lean-To Shed plans
  64 sq ft · from $2,894
• 10x14 Lean-To Shed plans
  140 sq ft · from $4,243

Questions

How much does it cost to build a 8x12 lean-to shed?

Between $3,551 (LP SmartSide siding and asphalt shingles) and $3,995 (board and batten siding and a metal roof) in materials at typical US big-box prices, before tax and delivery. Prices vary by region.

How much lumber do I need for a 8x12 lean-to shed?

About 105 boards (762 board feet) and 22 sheets of plywood, OSB or siding, depending on the options you choose.

How tall is a 8x12 lean-to shed?

About 11' 8-1/4" overall, standing on its gravel base, with walls framed from standard precut studs (the front wall is the tall one).

Is a 12x8 shed the same as a 8x12?

Same footprint: 96 square feet whether you write it 8x12, 12x8 or 8 x 12. This plan puts the 12-foot wall at the front with the door. If you want the door on the 8-foot wall, set width 8 and depth 12 in the free calculator and the plan is calculated again for that.

Change the size or options in the free calculator.