DIY Shed Cost Calculator

Building a standard 10x12 foot storage shed yourself typically costs between $1,800 and $3,500 in materials. Costs include $300-$500 for a gravel and pressure-treated skid foundation, $600-$900 for floor and wall framing lumber, $450-$750 for T1-11 or LP SmartSide siding, $400-$700 for roof trusses, OSB, and shingles, and $250-$400 for doors, hardware, and paint.

Building from scratch using raw lumber saves approximately 40% to 60% compared to purchasing a pre-assembled shed or pre-fabricated retail kit of identical size and specifications. A turnkey installed 10x12 shed from a dealer generally costs $4,500 to $7,000, whereas DIY raw materials total roughly $2,200 to $3,000.

A crushed gravel pad (4 inches deep) with ground-contact pressure-treated 4x4 or 4x6 timber skids is the most economical and durable DIY foundation. It costs roughly $250 to $450 in stone and lumber, provides excellent water drainage away from wood floor joists, and accommodates slightly uneven grades without pouring concrete.

Standard sheds use 2x4 framing lumber spaced 16 inches on-center (O.C.) for exterior walls and roof rafters/trusses. Floor joists should be pressure-treated 2x6 lumber spaced 16 inches on-center (or 12 inches O.C. for storing heavy lawn tractors) topped with 3/4-inch tongue-and-groove exterior-grade plywood.

In most residential jurisdictions, detached accessory storage structures under 120 square feet (such as an 8x10 or 10x12 shed) do not require a formal building permit, provided they comply with property line setback regulations (typically 3 to 5 feet from fence lines). Sheds larger than 120 or 200 sq ft almost always require municipal permits and plan reviews.