Shed Cost & Materials Calculator

Floor, walls, roof and sheathing takeoff for a backyard shed.

Shed — project drawing PROJECT DRAWING DECKS & STRUCTURES Shed FOOTPRINT 10 × 12 ft · 120 sq ft WALLS 8 ft · studs @ 16" OC ROOF Gable 4:12 SIDING T1-11 plywood DIFFICULTY Advanced BUILD TIME 12.5–21 days EST. MATERIALS $2,396–$3,241 MyBuildPlanner
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Shed

Advanced optionsframing, footings, finishing…
Roof
Framing
Openings
Estimating

Estimates are planning aids, not an engineered design. Confirm spans, footings and setbacks against your local code and permit before buying.

Estimated materials$2,396–$3,241
Shopping list ↓
PROJECT SUMMARY

Shed

Footprint10 × 12 ft · 120 sq ft
Walls
8 ft · studs @ 16" OC
Roof
Gable 4:12
Siding
T1-11 plywood
Foundation
Skid on gravel
Openings
4 ft door · 1 window
Difficulty
Advanced
Build time
12.5–21 days
Estimated materials
$2,396–$3,241

Cost breakdown

Material only · national-average rates
Lumber & Decking$830–$1,123
Siding & Trim$610–$826
Roofing$371–$503
Doors & Windows$281–$380
Fasteners & Hardware$116–$156
Finishing & Sealant$97–$131
Soil & Fill$54–$72
Connectors & Brackets$37–$51
Total$2,396–$3,241

Excludes tools, delivery, tax and permit fees. Labor not included — this is a DIY materials estimate.

Materials

ItemQty
Skids — 4×6 PTrunners on a gravel pad3 × 12 ft
Gravel pad4" leveled and tamped1.5 × cu yd
Floor joists — 2×6 PT16" on-center10 × 10 ft
Rim joists — 2×6 PT2 × 12 ft
Floor sheathing — 3/4" T&G plywood5 × 4×8 sheet
Wall studs — 2×4 (8 ft)16" OC + corners & openings57 × 8 ft
Plates — 2×4 (bottom + double top)3 plate runs17 × 8 ft
Header stock — 2×8 (doors/windows)3 × 8 ft
Siding — T1-11 plywoodstructural siding (no separate sheathing)13 × 4×8 sheet
Corner & opening trim — 1×46 × 8 ft
Rafters — 2×6 (5.3 ft)4:12 gable20 × 12 ft
Ridge board — 2×81 × 12 ft
Roof sheathing — 7/16 OSB5 × 4×8 sheet
Roofing underlayment2 × roll
Asphalt shingles≈ 1.4 squares5 × bundles
Drip edge5 × 10 ft
Ridge cap shingles12 lin ft ridge1 × bundle
Pre-hung shed door4 ft wide opening1 × ea
Shed windows1 × ea
Primer + exterior paintT1-11/LP needs sealing at the cut edges3 × gal

Hardware & fasteners

ItemQty
Joist hangers — 2×620 × ea
Framing nails (or screws)framing throughout2 × boxes
Hurricane ties (rafter-to-plate)20 × ea
Exterior screws (siding/roof)9 × lb
Roofing nails1 × 5 lb box

Shopping list

Grouped by store section

Lumber & Decking

Siding & Trim

Roofing

Doors & Windows

Connectors & Brackets

Fasteners & Hardware

Soil & Fill

Finishing & Sealant

Tools

✓ required · ○ helpful

Project notes

  • Estimates are a planning aid, not engineered drawings. Confirm your local shed size limit, setbacks and whether a permit or frost footing is required before building.
  • Build the floor (or mark the slab) dead-square first — measure the diagonals — then frame, sheath and stand each wall. Square framing makes every later step easier.
  • Wrap and side the walls before the roof goes on where you can, and always sheathe, dry-in with underlayment, then shingle the same day you open the roof up to weather.
  • Cut-edge sealing matters: prime and paint T1-11/LP edges and ends, and flash above the door and windows so water sheds outward.

About this planner

How the Shed Builder works

Tell the Shed Builder the footprint, wall height, siding and roof style and it produces a complete framing takeoff: the floor or slab, every stud and plate, rafters and ridge, wall and roof sheathing, shingles and drip edge, the door and windows, and all the fasteners and connectors — plus tools, a cost range and a build time.

Switch between a skid-on-gravel floor and a concrete slab, gable or lean-to roof, and 16" or 24" stud spacing, and the materials list rebuilds itself. Open advanced options for roof pitch, door width, windows and waste.

Step by step

How to build a shed

A high-level walkthrough of the build. Pair it with your plan above and always confirm spans, footings and setbacks against your local code.

  1. 1

    Prep the base

    For skids, level and tamp a 4" gravel pad slightly larger than the shed and set the pressure-treated runners dead level. For a slab, form, add gravel and rebar, pour and float it, then set anchor bolts before it cures.

  2. 2

    Frame and sheathe the floor

    If you're on skids, build the joist frame, check it for square by measuring the diagonals, and screw down the T&G plywood. A square, solid floor is the deck everything else is built on.

  3. 3

    Build the walls flat

    Frame each wall on the floor with its plates, studs, and door/window openings, then stand it up, brace it plumb, and nail the corners together. Add the second top plate to tie the walls into one ring.

  4. 4

    Set the rafters

    Cut one rafter as a pattern (birdsmouth and plumb cuts), test-fit it, then cut the rest. Set the ridge for a gable or a high wall for a lean-to, hang the rafters at your spacing, and tie each one down with a hurricane tie.

  5. 5

    Sheathe and dry-in the roof

    Screw OSB to the rafters, run drip edge on the eaves, roll out underlayment, then drip edge on the rakes. Get the roof watertight the same day you open it up.

  6. 6

    Shingle

    Start with a starter course at the eave and work up, overlapping each course and nailing in the manufacturer's strip. Cap the ridge last with ridge-cap shingles.

  7. 7

    Side, trim and hang the door

    Wrap the walls (for vinyl) or hang structural siding directly, add corner and opening trim, then set the windows and hang the door. Shim the door until it swings and latches cleanly.

  8. 8

    Seal and paint

    Caulk the joints, prime and paint the cut edges and faces of wood siding, and add a ramp or threshold at the door. Walk the shed and touch up anywhere water could get behind the cladding.

Equip the job

Recommended gear for this build

Hand-picked categories that match the shopping list above. Links open a current selection so you can compare brands and prices.

Connectors & BracketsHurricane tie connectorsTie every rafter to the top plate — cheap insurance against wind uplift.
$1–2 ea
Doors & WindowsPre-hung shed door kitSaves a frustrating afternoon building and squaring a door from scratch.
$180–350
RoofingArchitectural asphalt shinglesHeavier, longer-lasting and better looking than 3-tab for a few dollars more per square.
$35–45/bundle
Finishing & SealantSelf-adhered flashing tapeFlash the door and window heads so water sheds out, not into the wall.
$12–20/roll
ToolsCordless framing nailerTurns wall and roof framing from a day of swinging into a couple of hours.
$200–350

Keep planning

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Answers

Frequently asked questions

Do I need a permit to build a shed?

It depends on size and where you live. Many areas exempt sheds under a threshold — often 100–200 sq ft — but still enforce setbacks from property lines. Larger sheds, anything on a permanent foundation, or anything with electricity usually needs a permit. Check with your local building department and HOA before you start.

Skids or a concrete slab?

A skid foundation — pressure-treated runners on a level, drained gravel pad — is cheaper, faster, and can keep the shed classified as movable (sometimes permit-exempt). A slab is permanent, rodent-proof and rock-solid but costs more and commits you to the spot. The planner adjusts the whole materials list to your choice.

What roof pitch should a shed have?

A 3:12 to 4:12 gable sheds water and snow well and keeps the ridge low; steeper 6:12 gives more headroom and a more house-like look but uses more material. A lean-to (single slope) is the simplest to frame and ideal against a fence or wall. Pick the style and pitch and the rafter and shingle quantities update.

How accurate is the materials list?

Quantities follow standard framing rules — studs and rafters at your chosen spacing, sheathing by the sheet, shingles by the square — with an adjustable waste allowance. It's an excellent shopping baseline; do a final cut-list against your exact door and window sizes before buying, since openings change the framing slightly.