How Much Does It Cost to Build a 12×20 Gable Shed?
Pricing assumptions
- Pricing basis:our engine's baseline materials price table, built from Charlotte, NC–area retail estimates (spot-checked against Home Depot listings) — the region we operate in, not a location-specific quote for your ZIP code. Lumber and materials prices vary by region and week; treat the total as a planning baseline and check your local supplier.
- Price effective date: 2026-08-18. This date moves whenever the underlying price table is updated.
- Waste factors: included — a 10% waste allowance on framing lumber and sheet goods (higher on hip roofs and around openings), matching what the engine assumes for every quote it generates.
- Excluded: sales tax, delivery/freight, tools, permits, and site work (grading, foundation excavation). Labor is shown separately below only when an estimate is available — it is never folded into the materials number above.
Materials Cost Breakdown
| Category | Estimated Cost | % of Materials Total |
|---|---|---|
| Doors & Windows | $1,628 | 20% |
| Sheathing | $1,088 | 14% |
| Framing Lumber | $932 | 12% |
| Exterior Trim, Soffit & Paint | $894 | 11% |
| Roofing (Shingle) | $774 | 10% |
| Foundation | $764 | 10% |
| Siding | $666 | 8% |
| Fasteners | $461 | 6% |
| Housewrap & Rain Screen | $339 | 4% |
| Caulk, Flashing & Consumables | $267 | 3% |
| Hardware & Connectors | $152 | 2% |
| Materials Total | $7,964 | 100% |
DIY vs. Hiring the Framing Out
- DIY (materials only): $7,964 — you supply the labor.
- If you hire out the framing: add an estimated $5,000 in crew labor (roughly 8 build days for a 2-person crew), for a materials-plus-labor total of $12,964. This is crew labor only — it excludes contractor markup, permits, and site work, so a real contractor quote will run higher.
Frequently Asked Questions
- How much does it cost to build a 12×20 gable shed?
- Based on our engine's default materials bill of materials for the 12×20 Gable Large Shed plan, the computed materials cost is $7,964. A 12×20 gable shed runs approximately $6,400–$7,450 in materials for a DIY build, or $26,050–$30,400 installed if you hire a contractor. Siding, roofing material, and regional lumber prices drive most of the spread within each range.
- What's included in this materials estimate?
- The estimate covers every material line in the plan's bill of materials — framing lumber, sheathing, roofing, siding, doors & windows, fasteners, and hardware — priced at the engine's default rates. It excludes taxes, delivery, tools, and (unless shown below) labor. See the assumptions block on this page for the full list.
- Does this include labor to build it?
- No — the number above is materials only. If you hire out the framing, our engine also computes a separate crew-labor estimate of $5,000 (about 8 build days for a 2-person crew), for a materials-plus-labor total of $12,964. That figure excludes contractor markup, permits, and site work — it is not a contractor quote.
- What's the biggest cost driver for a 12×20 shed?
- Doors & Windows is the largest line item at $1,628, roughly 20% of the total materials cost. The full category breakdown is on this page.