Quantities follow the Builders Supply standard shed package for a rectangular gable-roof shed on a skid platform with 8-ft walls (92-5/8" precut studs), calculated from your dimensions with typical waste included on sheet goods and roofing. The Snow Country Roof Package upgrades framing for heavy-snow performance; the Standard roof meets typical code minimums for these sizes. This is not an engineered design — confirm quantities with us before final purchase. Detached sheds are exempt from a building permit in many Washington jurisdictions when under about 200 sq ft, but setback and zoning rules still apply — confirm with your local building department before you build.