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Here is how to build a shed: choose a plan, check local rules, level a base, build a floor on treated skids, frame and raise four walls, set the rafters and dry in the roof, then add siding, a door and trim.

Every stage below uses real numbers from a 10×12 gable shed (10 ft deep, 12 ft wide) drawn by the 3DSHEDPLANS plan generator, with a link to our deeper guide.

Before you build: plan, rules and tools

Pick the size and roof first. Start with what size shed you need, then pick a roof: a gable shed for headroom and loft space, a lean-to shed for the simplest framing, or a hip roof shed for a low roofline, though it takes the most angled cuts.

Check the rules. Size limits, height, distance from property lines and HOA rules vary a lot by town, so check your local permit office before you buy anything. Our shed permit checklist lists what to ask. Contact 811 before you dig so buried lines get marked.

Safety: wear eye and hearing protection, keep your finger off a nailer’s trigger until the tip is on the wood, and stay off a wet or frosty roof. Frame the roof from stepladders inside the shed, never standing on the wall plates.

Tools: circular saw, speed and framing squares, tape, chalk line, 4 ft level, an 8 ft straight board, hammer or framing nailer, drill driver, two stepladders, utility knife, tin snips and a caulk gun.

How to build a shed: the stages at a glance

The table lists what the 3DSHEDPLANS generator buys for a 10×12 gable shed with 2×4 walls at 16 in on center and a 6/12 roof. Shop from your own plan’s list.

Stage Main parts (10×12 gable) Deeper guide
1. Base Compacted gravel pad or blocks under the skids Shed foundation options
2. Floor 4 skids (4×4 x 12 ft), 2 rims (2×6 x 12 ft), 10 joists (2×6 cut 9 ft 9 in), 4 sheets 3/4 in T&G plywood How to build a shed floor
3. Walls 39 full-height studs cut to 90 in, three plate courses, a doubled 2×8 door header, a doubled 2×6 window header This article, Step 3
4. Roof frame 20 rafters cut from 6 ft 5 in 2×4 boards, 4 fly rafters, a 2×6 ridge 12 ft 8 in, 8 rafter ties, 4 collar ties, gable studs, 20 hurricane ties How to build a shed roof
5. Roofing 7 sheets 7/16 in OSB, 6 drip edge pieces, 1 roll of felt, 7 bundles of 3-tab shingles How to build a shed roof
6. Siding, door, trim 16 sheets of 5/8 in T1-11 (walls, gables, door leaves), 2 Z-flashing, 1×6 fascia, 1×4 trim, a window for a 36 x 36 in opening, 2 gable vents How to build shed doors

The 10×12 gable uses 93 2×4 boards for framing, as our count of 2x4s by shed size explains, plus 8 more 12 ft boards as temporary wall braces you can reuse. See what a shed costs to build for rough price ranges and build or buy a shed if you are still weighing a kit.

Step 1: Lay out the site and build the base

Pick a well-drained spot with about 3 ft of working room on every side. Drive four stakes, run string lines for the pad, and square them with a 3-4-5 triangle or by matching the diagonals. For a skid shed, make the pad about 1 ft bigger than the shed on each side, so a 10×12 shed gets a 12×14 pad.

Strip the sod and dark topsoil down to firm soil, often 4 to 6 in. Set a ground-contact treated border, lay landscape fabric, then spread 4 to 6 in of angular crushed stone in layers, compacting each one with a hand tamper or a rented plate compactor. Round pea gravel rolls and shifts, so skip it under skids.

Check the pad with the level on your straight board. Slopes, frost and large sheds can call for blocks, piers or a slab; shed foundation options compares them and covers anchoring.

Step 2: Build the floor frame and deck

Set the four skids level with each other, crown up. Mark 16 in centers on both 2×6 rims, nail the 2×6 joists between them with three 16d galvanized nails at each end, then square the frame: on a 10×12 floor both diagonals should read 187 7/16 in. Toenail each joist to every skid it crosses with two 16d nails, or use structural screws.

Glue and screw 3/4 in tongue and groove plywood with the long edge across the joists and end joints staggered. On a 10×12 the last row is a ripped 24 in strip: nail flat 2×4 blocks under its seam with the row before, and land the ripped edge on the rim.

Check the end tag: the American Wood Protection Association’s guide points ground-contact treatment (UC4A) at wood less than 6 in above the ground, which covers a low skid floor. Use fasteners rated for treated lumber. Full steps: how to build a shed floor.

Step 3: Frame and raise the walls

Use the deck as your workbench. Our plans build 94 1/2 in walls: a bottom plate, studs cut to 90 in, a top plate and a cap plate. A 2×4 really measures about 1 1/2 in by 3 1/2 in, as the American Wood Council explains, so do the math in real inches.

  1. Lay out the plates. Tack each bottom and top plate together and mark stud centers every 16 in plus the openings.
  2. Frame the long walls first. On a 10×12 the two 12 ft walls run the full length, and the 60 in double door sits centered in the front one. The two 10 ft side walls fit between them, so their plates are 7 in shorter (two wall thicknesses); one carries the 36 x 36 in window.
  3. Frame the openings. A door or window gets a king stud on each side, a trimmer (jack) stud under each end of the header, a header on edge, and short cripple studs above. On the 10×12 plan the door header is two 2x8s with a 1/2 in plywood filler on 6 ft 4 1/2 in trimmers, and the window header is two 2x6s built the same way.
  4. Nail and square each wall flat on the deck. Drive two 16d nails through each plate into each stud end, then measure both diagonals of the frame and rack it until they match.
  5. Raise and brace. Stand each wall with a helper, nail the bottom plate through the deck into the framing, plumb it and hold it with a diagonal 2×4 brace.
  6. Lock the corners. Nail the end stud of each side wall to the long wall’s end stud with 16d nails about every 16 in, add the cap plate so it overlaps the corner joints, then re-plumb every wall and reset the braces.

Cut the bottom plate out of the door opening only after the walls are up and braced.

Step 4: Frame the roof

Mark rafter positions on both long top plates. Cut one pattern rafter with a plumb cut at the ridge and a birdsmouth at the wall, test it at both ends, then trace the rest. Set the end pairs and the ridge first, propping longer ridges on a temporary 2×4 post, then fill in the pairs.

Rafter ties at the plates stop the rafters from spreading the walls, collar ties stiffen some interior pairs, and a hurricane tie at each rafter holds the roof down. Rafter size depends on span, spacing, species and snow load; you can check a span with the American Wood Council span calculator, and check your local permit office for the design snow load where you live.

Fill each gable triangle with stepped studs and a center stud under the ridge, leaving a vent bay, and side the triangles now (Step 6) while they are easy to reach. The 12 ft 8 in ridge runs 4 in past each gable to carry the fly rafters, which sit on lookout blocks nailed through that siding into the end rafter. Frieze blocks close the gaps over the eave walls.

Nail 1×6 fascia along the rafter tails and up each rake before any roofing. A lean-to roof skips the ridge and the gable triangles; how to build a lean to shed covers that version, and hip roof shed framing covers the hip.

Step 5: Sheathe and dry in the roof

Dry in the roof fast; a soaked deck swells. Lay 7/16 in OSB with the long edge across the rafters, start with a full sheet at the bottom edge, stagger the joints and land every end joint on a rafter. Gap sheets about 1/8 in and nail with 8d nails 6 in apart on edges, 12 in in the field.

Then work in this order: drip edge along the eaves, underlayment, drip edge along the rakes over the underlayment, starter strip, shingles, ridge cap. The Asphalt Roofing Manufacturers Association shows the drip edge order. On a lower-pitch roof, follow the shingle maker’s instructions for minimum slope and underlayment; our shed roof pitch guide explains the tradeoffs.

Step 6: Siding, door, window and trim

T1-11 or engineered wood panels go on vertically, with every vertical seam landing on a stud, nailed with 8d hot-dip galvanized siding nails per the maker’s guide. Run the panels down over the floor frame so the deck-to-wall joint is covered, with Z-flashing where they meet the gable panels; on the eave walls the frieze blocks and soffit close the top. Check the siding maker’s ground clearance: if 4×4 skids on gravel sit too low, raise them on solid blocks.

Hang the door and set the window plumb, with drip cap over both heads. Add 1×4 corner and casing trim and the eave soffit, then caulk and paint all bare wood, cut edges included. Fit screened vents in the gable bays; see shed ventilation. Building and hanging a double door is covered step by step in how to build shed doors.

How long does it take to build a shed?

Our 10×12 gable shed plan page estimates about 48 hours of work for a team of two, over 19 step-by-step sections. A small lean-to takes less, a 12×16 more. Try to frame and dry in the roof within one dry spell.

Common mistakes when building a shed

  • Skipping the level check on the base. A skid 1/2 in low shows up as a door that rubs and a wall that will not plumb.
  • Not squaring the floor. If the diagonals differ, every wall and every sheet of OSB after it fights you.
  • Leaving the deck open to rain. Tarp it if the roof is not on by nightfall.
  • Skipping the overhangs. Eave and rake overhangs keep water off the siding and the door. Keep the fly rafters and lookouts your plan shows.

What we checked: part counts, wall height and diagonals come from the 3DSHEDPLANS plan generator; build time and step count from our live 10×12 plan page; lumber sizes from AWC; treated-wood ratings from AWPA; drip edge order from ARMA.

Plans that fit

Every 3DSHEDPLANS plan is a PDF with a material list, step-by-step sections and 3D images, built on the skid floor and framing order shown here, with cut lengths for each part.

Browse every size on our shed plans page.

Frequently asked questions

What is the first step in building a shed?

Pick the size and the plan, then check your local permit office about size, height and placement before you buy lumber. Contact 811 before you dig, with the notice your state asks for. Only then clear and level the site for the base.

What order do you build a shed in?

Base, floor, walls, roof framing, roof sheathing and roofing, then siding, door, window and trim. Get the roof dried in as soon as the framing is up, so rain never sits on the floor deck.

What is the easiest shed to build from scratch?

A small lean-to shed is usually the easiest: one roof slope, no ridge, and every rafter the same. A small gable shed is a close second and gives more headroom and overhead storage.

Can one person build a shed alone?

Much of it, yes: the base, floor, wall framing, siding and trim. Raising long walls, setting the ridge and lifting OSB onto the roof go faster and safer with a helper, so book a second person for those days.

Do I need a foundation to build a shed?

Every shed needs a firm, level, well-drained base. For most wood sheds that means pressure-treated skids on a compacted gravel pad or on concrete blocks. Larger sheds or sloped sites may need piers or a slab, so check your local permit office.

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