How to Build a Backyard Shed - step by step process guide

How to Build a Backyard Shed

6 steps 48h 0min Advanced

Pre-fab kit shed: 1-2 days assembly, $1500-3000. Stick-built from scratch: 2-4 weekends, $2000-4000 in materials. Both cheaper than $6000+ installed.

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Step-by-Step Instructions

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Step 1: Check permits (size threshold)

Most cities allow sheds under 120 sq ft without permit. Over that = permit + drawings + inspection.

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If permit required: plans + setbacks

Same permit process as deck.

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10x12 = 120 sq ft (often permit-free)

Check local code. May be exempt.

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Step 2: Pick foundation type

Concrete slab: permanent, best. Skid foundation: 4x4 timbers, can be moved. Gravel pad: cheapest, decent.

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Concrete slab (permanent, best)

Skid pad or full slab. ~$300-500 in concrete.

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Skid foundation (movable)

Pressure-treated 4x4s on gravel. ~$100.

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Gravel pad (cheapest)

Just leveled gravel + treated joists. ~$50-100.

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Step 3: Frame the floor

2x6 joists 16" OC over the foundation. 3/4" plywood subfloor. Standard residential framing.

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Pressure-treated 2x6 joists

For ground-contact applications. ~$10 each.

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3/4" plywood deck

OSB or plywood. Plywood lasts longer. ~$40/sheet.

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Step 4: Build walls + raise

Build walls flat on the floor. Standard 2x4 studs 16" OC, header for door + windows. Raise into place, plumb, brace.

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2x4 studs 16" on center

Standard framing.

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Pre-hung shed door + window (kit)

Skip cutting custom openings. ~$300.

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5

Step 5: Roof framing + sheathing

Simple gable roof — rafters meet at ridge. 4/12 pitch for snow-free climates, 8/12 for snow. OSB sheathing + felt + shingles.

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Pre-cut rafters from lumber yard

Skip the math. ~$30 each.

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Architectural shingles (lifetime)

Better than 3-tab. ~$100/square (100 sq ft).

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Step 6: Siding + trim + paint

T1-11 plywood siding: cheap and quick. LP SmartSide: better, longer lasting. Trim + paint = finished shed.

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T1-11 plywood siding (cheap)

Vertical grooves look traditional. ~$50/sheet.

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LP SmartSide engineered siding

Pre-primed, 50-year warranty. ~$80/sheet.

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