DIY Shed Cost Calculator
Calculate building costs for storage sheds with foundation, wall, and roofing materials
Calculate Shed Building Cost
Roof extension beyond walls
Calculated Areas
Material Costs per Area
Cost Breakdown
Cost Analysis
Example Calculation
Garden Shed Example
Slanted roof shed: 2.0m × 1.5m × 2.4m
Roof rise: 0.6m
Overhang: 0.4m
Material costs: Foundation $50/m², Walls $75/m², Roof $60/m²
Calculation
Floor area: 2.0 × 1.5 = 3.0 m²
Wall area: 2 × (2.0 + 1.5) × 2.4 + (1.5 × 0.6 × 1) = 17.7 m²
Rafter span: √[(2.3)² + (0.92)²] = 2.477 m
Roof area: 2.477 × 1 × (2.0 + 2 × 0.4) = 6.94 m²
Total cost: 3.0 × $50 + 17.7 × $75 + 6.94 × $60 = $1,898.40
Roof Type Guide
Flat Roof
Simple design, minimal materials
Best for: Basic storage sheds
Slanted Roof
Single slope, good drainage
Best for: Lean-to sheds
Gable Roof
Two slopes, traditional design
Best for: Standalone sheds
Building Tips
Check local building codes before starting
Level foundation is crucial for stability
Use pressure-treated lumber for foundation
Plan for proper ventilation
Consider adding 10% extra material for waste
Understanding DIY Shed Cost Calculation
Main Cost Components
- •Foundation: Concrete slab or wooden flooring with floor joist system
- •Walls: Framing materials, siding, and any finishing materials
- •Roofing: Rafters, sheathing, shingles, and weatherproofing
- •Hardware: Nails, screws, hinges, and door/window hardware
Cost Factors
- •Material quality and type (wood, metal, composite)
- •Local material prices and availability
- •Shed size and complexity
- •Foundation type and site preparation
Calculation Formulas
Floor Area: Af = L × W
Wall Area: Aw = 2 × (L + W) × H + (W × R × c)
Rafter Span: S = √[(W + 2O)² + (cRt(1 + 2O/W))²] / t
Roof Area: Ar = S × t × (L + 2O)
Total Cost: Af×Pf + Aw×Pw + Ar×Pr
Variables:
L = Length, W = Width, H = Wall Height
R = Roof Rise, O = Overhang
c = Roof constant (0 for flat, 1 for others)
t = Rafter constant (1 for flat/slanted, 2 for gable)
Pf, Pw, Pr = Price per area for foundation, walls, roof