8x10 Shed Plans

Floor framing plan of an 8x10 ft gable shed seen from above: 2 skids, rim joists and 7 joists at 16 in on center, with the door opening marked on the front wall. — The floor frame exactly as the generator draws it for an 8x10 ft gable shed: 2 4x6 skids on the ground, 4 2x6 rim and band joists around the edge and 7 2x6 joists at 16 in on center, for 80 sq ft of floor. The rest of the plan follows the same numbers: 101 pieces in the cut list, 16 build steps, walls 80 in tall, a single door opening 36 in wide by 74 in high and 4 bundles of shingles for 99.5 sq ft of roof.

An 8x10 ft shed is 80 sq ft on a skid floor, adding 2 ft of depth over the 8x8 for more storage without a wider footprint. Front and back walls still run 96 in (8 ft), no splice needed; the 10 ft side walls (113 in once corner posts are accounted for) are a single 10 ft board each.

With a gable roof, each rafter runs 59.7 in, the same as the 8x8 since rafter length follows the 8 ft width, not the depth. With a lean-to roof, the back wall frames 18 in taller than the front, and each rafter runs 127.4 in, just over 10 ft, so plan on a 12 ft rafter board with offcut.

Two floor skids run the full 10 ft depth with joists on 16 in centers between them. Available with a single or double door.

See every option side by side with the free Shed Material Calculator, or buy this size directly on the Parametric Shed Plan page.

What the extra 2 feet buys

Going from 8x8 to 8x10 adds 16 sq ft without widening the footprint, which matters when the shed sits along a fence or a side passage. In practice the depth is what turns storage into usable space: a 24 in deep bench across the back wall still leaves 8 ft of clear floor in front of it, and long handled tools stand against the side wall instead of blocking the door.

What goes under it

Every plan here frames the floor on pressure treated skids, which means the shed can sit on a compacted gravel pad rather than a poured slab. The usual build is 4 in of compacted crushed stone extending about 12 in past the footprint on every side, levelled across the diagonals before the first skid goes down. Solid concrete blocks under the skids at regular intervals keep the timber off standing water. Get this stage level and square and the walls go up without fighting; get it wrong and every later cut fights the error.

Door placement

On a 8 ft wide front wall, a single door sits centred or offset to one side. Offsetting leaves an uninterrupted run of wall inside for shelving, which is usually worth more than a symmetrical elevation. A double door on this width is mostly for getting a mower or a wheelbarrow through without a tight turn: measure the widest thing you will ever roll in before choosing.

Check before you order lumber

Two local rules decide whether a size is buildable where you are, and neither is in any plan: the floor area above which your jurisdiction requires a building permit, commonly in the 100 to 200 sq ft range but set locally, and the setback distance from property lines and other structures. Both are answered by a phone call to the building department, and both are cheaper to answer before the timber is on the driveway than after the neighbour asks.

Build order that keeps the frame square

Mark the gravel pad first, not the lumber. Set four corner marks for the finished shed footprint, then check both diagonals. For a rectangular 8 ft by 10 ft layout, the diagonal is about 153.6 in. If the two diagonal measurements differ by more than 1/4 in, move one corner before any skid is placed.

Set the skids on blocks or compacted bearing points, then level them from side to side and from front to back. A 6 ft level is useful, but a straight 10 ft board with a shorter level taped to it also works. Shim under the blocks, not between the floor frame and the skid, because thin shims under framing crush and fall out over time.

Build the floor frame on the skids, tack the rim first, then set the intermediate joists. Before fixing the sheathing, measure the diagonals of the floor frame again. Pull the long diagonal shorter with a ratchet strap, then fasten the sheathing while the frame is square. The sheathing locks the rectangle more reliably than extra nails in the rim.

Frame the two long walls flat on the floor, then the front and back walls. Stand opposite walls first and brace them with temporary 2x4s fixed to stakes or to the floor rim. Do not install roof members until all four walls are plumb and the top plates are tied at the corners. If you are adapting another size, compare the sequence with the general shed layouts on shed plans.

Tools, layout marks, and working tolerances

A shed of this size can be built with common site tools, but accuracy depends on marking the same reference face on every board. Put an X on the waste side of each cut line, and keep the saw blade on that side. A typical circular saw kerf removes about 1/8 in, which is enough to make repeated short cuts visible at the corners.

Item to check	Target figure	When to check it
Floor diagonal difference	1/4 in or less	Before floor sheathing is nailed
Wall plumb tolerance	1/8 in over 4 ft is workable	Before roof framing starts
Stud layout mark	3/4 in back from the center mark	When marking plates for 16 in centers
Door rough opening clearance	About 1/2 in wider than the finished door frame	Before the header is fixed
Roof overhang match	Within 1/4 in side to side	Before fascia or trim is fixed

Keep a speed square, tape measure, chalk line, clamps, hammer or nailer, drill, circular saw, handsaw, 4 ft level, string line, and two temporary braces at the work area. A miter saw speeds repeated cuts, but it is not required if each board is marked squarely and supported near the cut.

Fastener length should suit the joint, not the shed size. Use longer structural nails or screws where framing members cross, and shorter exterior rated fasteners for sheathing and trim so points do not protrude inside. Check your local fastening rules if the shed will be inspected.

Common errors and practical recovery

If the floor is out of square after it is sheeted, do not try to hide the error in the wall framing. Remove enough sheathing fasteners to let the rim move, pull the diagonal into line with a strap, then refasten. A 1/2 in floor error often becomes a roof and door error if it is ignored.

If a wall is framed slightly long, trim the bottom and top plates together before standing it. Do not cut individual studs shorter to force the wall between the other walls, because the top plate then waves and the roof seat becomes uneven.

If the door opening is tight, correct it before siding. Plane or trim the jack studs only when the header remains fully supported. If the opening is wide by less than 1/2 in, add a full height shim behind the jamb rather than stacking small pieces at hinge points.

If a skid rocks on one block, lift the skid and reset the block on compacted stone instead of wedging scrap wood under it.
If a stud crown faces inward on one wall, turn it before sheathing so the siding plane stays flatter.
If roof framing differs from side to side, mark a single test rafter first and copy only after it fits both ends.
If rain is expected before roofing, cover the floor with a tarp that drains past the rim, not into the wall plates.

Special cases to plan before cutting

For a sloped site, treat the shed as a level structure on adjusted supports, not as a frame that follows the ground. A fall of 4 in across the 10 ft depth is enough to require taller support at one end. Keep the bearing solid, and avoid tall loose stacks of blocks.

For a mower, snow blower, or wheelbarrow, check turning space as well as door width. A machine that fits through the opening may still need a straight approach of 4 ft to 6 ft outside the shed. If that space is not available, door placement matters more than the nominal shed size.

For shelving, leave the first 24 in beside the door clear for your body and for tool handles. Shelves deeper than 18 in on both side walls make the center aisle narrow. A better layout is one deep back shelf and shallow side shelves for small containers.

For cold or damp sites, leave an air path under the floor and keep soil, mulch, and stored firewood away from the siding. For permit, setback, and inspection questions, check the local rules first, then use the answers to adjust the plan. General planning questions are covered on the FAQ.