Shed plans
10x12 Lean-To Shed Plans
A 10x12 lean-to shed gives you 120 square feet of storage. Here's everything it takes to build one, calculated from our plan for this exact size.
$3,569estimated materials
120 sq ftfloor area
104boards to buy
26sheets
11' 3-7/8"overall height
Materials list
| Item | Qty | Est. |
|---|---|---|
| PT 4x6 x 10' Pressure-treated, ground-contact (UC4A) rated. |
3 boards | $78 |
| PT 2x6 x 12' Pressure-treated, ground-contact (UC4A) rated. |
9 boards | $119 |
| PT 2x6 x 10' Pressure-treated, ground-contact (UC4A) rated. |
2 boards | $22 |
| 2x8 x 14' | 2 boards | $34 |
| 2x6 x 14' | 11 boards | $131 |
| 2x6 x 12' | 2 boards | $20 |
| 2x4 x 14' | 6 boards | $49 |
| 2x4 x 12' | 5 boards | $35 |
| 2x4 x 10' | 2 boards | $12 |
| 2x4 x 116-5/8" precut stud | 10 boards | $60 |
| 2x4 x 92-5/8" precut stud | 35 boards | $139 |
| 1x4 x 14' | 2 boards | $27 |
| 1x4 x 12' | 6 boards | $68 |
| 1x4 x 10' | 2 boards | $19 |
| 1x4 x 8' | 7 boards | $53 |
| 23/32" T&G plywood subfloor (Sturd-I-Floor) 4x8 120 sq ft net |
4 sheets | $232 |
| 15/32" CDX plywood roof sheathing 4x8 148.3 sq ft net |
6 sheets | $204 |
| LP SmartSide 38 Series panel 3/8" 4x9 (8" o.c. grooves) 294.7 sq ft net |
10 sheets | $620 |
| LP SmartSide 38 Series panel 3/8" 4x8 (8" o.c. grooves) 122.1 sq ft net |
6 sheets | $312 |
| 3/4" crushed stone, bulk (delivered) 4" compacted pad, 12" past the shed on every side (+15% for compaction) |
2.5 cu yd | $138 |
| Aluminum drip edge 10 ft Eaves under the underlayment, rakes over it |
6 pieces | $57 |
| Architectural asphalt shingles (3 bundles = 1 square) 148 sq ft of roof + 10% waste |
5 bundles | $210 |
| Shingle starter strip (~100 lin ft) | 1 bundle | $48 |
| #15 felt underlayment roll (~400 sq ft) Two layers (low slope, IRC R905.2.2) |
1 roll | $30 |
| 1" plastic cap nails (box of 2,000) | 1 box | $24 |
| 1-1/4" galvanized roofing nails 5 lb 4 nails per shingle (6 in high-wind areas) |
1 box | $17 |
| 16d (3-1/2") galvanized framing nails 5 lb (~240) ~1012 nails: 6 per framing piece + 1 per 8" of plate/rim |
5 boxes | $120 |
| #9 x 2-1/2" exterior deck screws 5 lb (~450) ~60 screws per floor sheet |
1 box | $38 |
| Subfloor adhesive 28 oz | 2 tubes | $16 |
| 8d ring-shank galvanized nails 5 lb (~450), roof sheathing ~60 nails per roof sheet |
1 box | $26 |
| 8d hot-dip galvanized siding nails 5 lb (~450) ~70 nails per siding panel |
3 boxes | $81 |
| 6d galvanized casing nails 1 lb (~150) 155 lin ft of trim |
2 boxes | $16 |
| Hurricane tie (Simpson H2.5A or equal) One at every rafter-to-plate seat, plus the floor-to-beam corners |
26 each | $25 |
| 10d x 1-1/2" connector nails 1 lb (~100) Use only connector nails in metal connectors |
3 boxes | $27 |
| 8" heavy-duty T-hinge | 6 each | $54 |
| Safety hasp 4-1/2" | 1 each | $9 |
| Door pull handle | 2 each | $16 |
| Barrel bolt 6" Top and bottom of the fixed leaf |
2 each | $14 |
| Shed window for 24" x 36" rough opening Rough opening 24" x 36" on the right wall |
1 each | $123 |
| Exterior acrylic paint 2 coats over ~513 sq ft |
3 gallons | $144 |
| Exterior paintable caulk 10 oz Seal trim edges and panel joints |
11 tubes | $77 |
| Z-flashing 10 ft Over every door/window head and at horizontal siding joints |
3 pieces | $27 |
| Optional / recommended | ||
| Landscape fabric 3 ft x 50 ft Under the gravel to stop weeds |
2 rolls | $44 |
| Auger ground anchor 30" with strap Recommended in windy areas and often required by code/HOA |
4 each | $72 |
| House wrap 9 ft x 100 ft Optional weather barrier behind the siding (recommended by LP for insulated buildings) |
1 roll | $140 |
Prices are typical US big-box estimates and vary by region and season. Check your local store.
Questions
How much does it cost to build a 10x12 lean-to shed?
About $3,569 in materials at typical US big-box prices, before tax and delivery. Prices vary by region.
How much lumber do I need for a 10x12 lean-to shed?
About 104 boards (816 board feet) and 26 sheets of plywood, OSB or siding, depending on the options you choose.
How tall is a 10x12 lean-to shed?
With standard 8' walls it stands about 11' 3-7/8" tall overall.
Change the size or options in the free calculator.
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