10x24 Lean-To Storage Shed Plan

The full plan is $19.99: buy the 10×24 lean-to shed plan. To see the drawing style first, open the free 10×24 lean-to shed plan PDF, a streamlined version of the five stages.

10×24 lean to shed plans: the numbers for a site check

The roof sets the space you need: 24′ 9 1/2″ long and 11′ 4 1/2″ from front to back at the fascia. Measure the drip line at the back against fences and property lines, not just the walls. The door swings out, the ramp and its landing reach 7′ 2 1/2″ out from the front wall, and the plan asks for 10′ 0″ clear and level in front of the wall if you want to line up a tractor square.

How the 10×24 lean-to shed goes together

The plan has 28 sections plus a printable checklist. Sections 9 to 27 are the 19 build steps, from preparation and ground breaking to the ramp.

The pad frame, skids and floor

Step 9 starts with the layout: stake the corners 24′ 0″ along the front and 10′ 0″ along the sides, then move one stake until both diagonals read 26′ 0″. Dig 4″ deep over a 26′ 11″ x 12′ 11″ area, plus a landing in front of the door 9′ 8″ wide that reaches 7′ 2 1/2″ out from the front wall.

Frame the pad with pressure-treated 4x6s laid flat, joined at the corners with two galvanized 10″ timber spikes each, squared until the pad diagonals both read 28′ 7 5/8″, and pinned with 34 rebar stakes. The back piece is two 13′ 5 1/2″ lengths butted end to end. The landing is 8′ 9″ wide inside the frame and reaches 5′ 9″ past the pad. Fill the 26′ 0″ x 12′ 0″ frame with 4″ of 3/4″ crushed stone, compacted in two layers with a hand tamper. On a sloped yard the plan has you find the fall with a string and line level first, then build the stone up on the low side or set solid blocks under the skids.

A 24 ft skid is longer than any 16 ft board, so each of the four is spliced from an 8 ft and a 16 ft piece butted on the gravel. Skids 1 and 3 run 8′ 0″ then 16′ 0″ from the left end, and skids 2 and 4 run 16′ 0″ then 8′ 0″, so every joint sits under a floor joist and 4 ft or more from the joint in the next skid. A 3 ft pressure-treated 2×4 scab goes on both sides of each joint. The skids sit 3′ 2 13/16″ on center and need ground-contact lumber (UC4A or higher).

The two rims are spliced too, as an 11′ 11 1/4″ piece and a 12′ 0 3/4″ piece, over a doubled joist, which is why the list has 20 floor joists of 9′ 9″ for 19 layout lines. The finished frame weighs about 530 lb and racks out of square if you lift it, so the plan has you build it on the skids, push it until both diagonals read 26′ 0″, and only then toe-nail it down and add a framing angle at each of the 80 joist-to-skid crossings. Nine sheets of tongue and groove plywood cover the deck. Two full rows cover 7′ 11″, so the last row is ripped 2′ 1″ wide.

How the walls go up on a 10 ft deck

The tall front wall goes up first, while it has the whole deck to itself. Every wall is framed flat at its own edge, tips up on its bottom plate and lands flush.

• Front wall in two sections. It is framed with the bottom plate 3 1/2″ in from the front edge, as two sections side by side: 15′ 11 1/4″ (about 230 lb) and 8′ 0 3/4″ (about 110 lb). Lying down, its top plate sits only about 8 7/8″ from the back edge of the deck, too little to stand on, so each lift starts on the gravel with three people.
• Props for the step up. The three lift the section to waist height, then rest it on two 2×4 props about 31″ long, cut from the brace offcuts. Each lifter then steps up onto the deck one at a time before they push it the rest of the way.
• Stop posts and low braces. Three stop posts, 4 ft pieces of a spare 12 ft brace, screw to the outside of the rim so the wall stops at plumb. The braces, cut to about 9′ 5″, go on where you reach them from the deck.
• Back wall in two sections. Framed flat at the back edge as 14′ 7 1/4″ (about 180 lb) and 9′ 4 3/4″ (about 100 lb) sections, each a lift for two.
• Side walls last. Each sloped side wall weighs about 100 lb, a lift for two. Its plates are 1/4″ shorter than the gap, so it tips up between the front and back walls.
• Siding after. All four walls go up as bare frames, and the T1-11 goes on once they stand.

Pick a calm day. A bare frame catches wind like a sail, and nobody stands on the ground in front of a wall while it goes up.

The front wall’s 19 studs are 8′ 8 5/8″ long, longer than a 92 5/8″ precut and longer than a full 8 ft board, so they come from 2×4 x 10 ft boards. The side walls have eight stepped studs each, beveled at 14.0 degrees on top, from 6′ 5 3/8″ to 8′ 9 3/16″, and the three longest come from 10 ft boards too. Mark the sloped plate from its own column, or the last stud ends up 3 7/16″ off plumb. A sloped wall has unequal diagonals, so the plan squares it on a rectangle instead: mark both end studs 6′ 0″ up and make the two diagonals match at 11′ 1 3/4″. No board is 24 ft long, so the second top plates are spliced too: on the front wall it runs 8′ 0″ then 16′ 0″, its joint 7′ 11 1/4″ from the section joint, and on both long walls it bridges each section joint by at least 4′ 0″. A twist strap ties each of the four corners.

Door, window and ramp: sizes and positions

The door opening is 6′ 0″ wide and 6′ 4 1/2″ tall, from 9′ 0″ to 15′ 0″ measured from the left corner of the front wall, under a header of two 2x8s at 6′ 3″ with 1/2″ plywood between them. Once the bottom plate is cut out it is 6′ 6″ framed, with 6′ 5 1/4″ clear under the head stop.

The two leaves come from two new T1-11 sheets, since the cut-out piece is only 6′ 4 1/2″ tall. Each is 2′ 11 5/8″ wide and 6′ 5 1/4″ tall, with a 1×4 frame and two Z braces. Three T-strap hinges hang each leaf on carriage bolts with the nuts inside, so nobody can unscrew the door from outside, and the leaves swing out. The left leaf carries the latch; the right one is fixed with two barrel bolts on a 1×2 astragal. A 10″ hook and eye, 36″ above the deck, holds each leaf open in wind.

The window is a prefabricated unit for a 36 x 36 in rough opening in the back wall, from 10′ 6″ to 13′ 6″ measured from the right corner, under a doubled 2×6 header 3′ 3″ long. Its sill sits 2′ 10″ above the bottom plate.

The ramp is a detachable unit of ground-contact lumber: 8 tapered 2×10 stringers 11 3/8″ on center under 8 boards of 2×6, 6′ 9″ long. Two hook-and-eyes hold it to a ledger on the rim and skid. A skid splice scab sits behind the ledger here, so a flat 2×4 filler notched over it goes on first. Grit tape on each board keeps the ramp from being slick, and the door leaf swings out over it with 1 1/4″ to spare.

What is on the 10×24 lean-to shed material list

The shopping list is split by stage, in the stock lengths that waste the least:

• Foundation and floor: four 16 ft and four 8 ft pressure-treated 4x4s for the four spliced skids, two 14 ft pressure-treated 2x4s for the eight splice scabs, twenty 10 ft pressure-treated 2x6s for the joists, two 12 ft and two 14 ft pressure-treated 2x6s for the spliced rims, and 9 sheets of tongue and groove plywood.
• Pad and ramp: six 16 ft and one 10 ft pressure-treated 4×6 for the pad frame, about 5.4 cu yd of 3/4″ stone, 34 rebar stakes, 16 timber spikes, and ground-contact 2×10, 2×6 and 2×4 boards for the ramp.
• Walls: 2×4 plates and studs (19 studs in the front wall, 21 in the back, 8 stepped studs in each side wall), a doubled 2×8 door header and a doubled 2×6 window header, plus 20 sheets of T1-11: 6 4×10 on the tall front wall, 6 4×8 on the back, 2 4×10, 2 4×8 and 2 4×9 on the sides, and 2 4×8 for the door leaves.
• Roof: twenty-one 12 ft 2x6s for the 19 rafters and 2 fly rafters, four 10 ft and one 8 ft 2×6 for the blocking, 10 sheets of OSB, 2 rolls of 15 lb felt, 11 bundles of shingles and 10 pieces of drip edge. Fascia is 1×8: two 12 footers and two 14 footers for the eaves and two 12 footers for the rakes.
• Door, window and trim: 6 T-strap hinges with 18 carriage bolts, a handle and latch, 2 barrel bolts, 2 brush sweeps, 2 hold-open hooks, a threshold cap, the prefabricated window, two sheets of 1/2″ plywood for the header fillers and soffit, and 1×4 casing and corner trim.
• Hardware: 32 lb of framing nails, 34 hurricane ties, 4 framing angles for the end rafters, 80 for the floor frame, 4 twist straps, 10 ground anchors with 60 structural screws, 11 tubes of construction adhesive, flashing tape, drip cap, insect screen, 18 temporary braces and 6 gallons of paint.

The longest boards on the list are 16 ft: the six pad frame 4x6s, four of the skid pieces and the long wall plates. No piece is cut longer than a stock board: the skids, rims and long plates are all spliced, so nothing on the list is 24 ft. The front wall needs 4×10 sheets cut to 9′ 3 3/8″ with no joint, and many stores special-order 4×9 and 4×10 sheets, so order them before you start and ask the yard to deliver. No 4×9 sheets at your store? The plan says to buy 4×10 and cut each piece to the marked height.

What you can fit in a 10×24 lean-to shed

The plan draws the floor to scale with the gear in it, 23′ 5″ wide and 9′ 5″ deep inside. Check the fit before you buy:

• A 42 inch rider. The drawing parks a 42 inch deck mower, 4′ 7 3/16″ wide and 5′ 10″ long, nose in. With both leaves open the door is about 5′ 11 1/2″ clear, so it clears each side by 8 1/8″. A 48 inch deck fits with its deflector raised, and a 54 inch deck does not.
• Room behind it. Park the nose about 1″ off the back wall, between the shelf runs, and there is about 3′ 6″ of cross aisle behind its tail.
• More gear. The drawing also fits a wheelbarrow (2′ 2″ x 5′ 0″) and two bikes with the handlebars staggered (2′ 6″ x 5′ 10″), with plenty of the 24 ft length left over.
• Shelves. There is room for 12″ deep shelves on the back wall in 2 ft runs. They are yours to add, and not on the shopping list.
• Height. Tall items stand at the front wall, with 8′ 10 1/8″ clear. The back wall has 6′ 5″ clear, so keep shelves there low.

The ramp is 6′ 9″ wide and 3′ 6″ out at a 1:6 slope. It hooks to a ledger, so you can lift it away to level or move the shed. Its top ends about 13/16″ below the deck, with an aluminum threshold cap and no threshold board, so wheels roll straight in. A slot of about 2 5/8″ stays between the top board and the siding, so keep it swept and lay a scrap of plywood across it for a small caster. Set the mower deck to its highest cut before you push it up.

10×24 lean-to vs 10×20 lean-to vs 10×24 gable

All three have a 6 ft front double door, about 5′ 11 1/2″ clear, and a wheel-in ramp. They differ in width and roof.

Pick the 10×24 lean-to for the most floor under a low, single-slope roof that drains to one side. Pick the 10×20 lean-to if 24 ft is too long for your spot. Pick the 10×24 gable if you want the same floor with a peaked roof and the back wall free of openings.

How the 10×24 lean-to roof is framed

A single-slope roof has no ridge and pushes nothing outward, so no rafter ties cross the shed. Hurricane ties on the inside face of each wall hold each rafter to both plates, with a framing angle at each of the 4 corners where the end rafters sit on the sloped side-wall plates.

• Why 2×6. The plan sizes the rafters as 2×6 over the 9′ 5″ clear span at 16″ on center, in #2 spruce-pine-fir or Douglas fir-larch at about 30 psf of ground snow. Snow loads differ from place to place, so check the rafter size with your local permit office before you buy.
• Two birdsmouths. Each rafter sits on both walls with a 3 1/2″ level seat and a 7/8″ plumb heel. Never cut deeper than one third. The front one is easy to cut backwards, and it has its own drawing.
• Pattern first. Cut one pattern rafter from a straight 2×6 (board 11′ 8 1/2″, top edge 11′ 7 1/8″, from a 12 ft board). Check that the walls measure 9′ 8 1/2″ heel to heel at both ends and in the middle, measured level, test the pattern on both walls at each end of the shed, keep it as the first rafter, then cut 18 more and the 2 fly rafters.
• Getting them up. Each board is about 30 lb and longer than the room, so it takes 2 people, one on a step ladder at each wall. You feed it in through the door, over a ledge you screw across the door trimmers first, which holds the high end while the front person climbs.
• Blocking and vents. 2×6 blocks ripped to 4 3/4″ tall fill the bays over each wall, with 1″ vent holes drilled through them. Air comes in at a screened soffit gap, rises through the holes and leaves at the high wall.
• Rakes. The end rafters are nailed up through the sloped side wall plates, and 2×4 lookout blocks 2 1/2″ long, about every 1′ 9 3/16″, hold the fly rafters at each 4″ rake.
• Low pitch, double felt. At 3/12 the shingle makers ask for two layers: a 19″ starter strip, then 36″ courses lapping 19″, with 4″ end laps (Asphalt Roofing Manufacturers Association). Ten sheets of OSB cover the 24′ 8″ x 11′ 7 1/8″ roof, and the plan lays 28 courses at 5″ exposure, about 264 shingles, which is 11 bundles with the starter.

Anchoring the shed

The plan says this shed, empty on loose skids, slides at about 9 psf of wind (gusts near 55 mph) and tips at about 18 psf. So it has you anchor the floor in step 13, before any wall goes up. It uses 10 screw-in auger anchors, 30″ or longer, galvanized, each with a steel strap: 5 along the front outside skid at 1′ 0″, 6′ 3″, 12′ 0″, 17′ 6″ and 23′ 0″ from the left end, and 5 along the back one at 1′ 0″, 6′ 6″, 12′ 0″, 17′ 9″ and 23′ 0″. An auger will not start in compacted stone, so you dig the stone back to the soil at each spot. Each strap runs up the skid and onto the rim joist, fastened with 4 screws into the skid and 2 into the rim. The front anchor at 12′ 0″ sits behind the ramp, so the ramp ledger screws go in beside its strap. Check your local permit office for what your area asks.

Free 10×24 lean-to plan PDF vs the full plan

The free streamlined version walks through the five stages (site and foundation, floor, walls, roof, trim and paint) with views from the plan. It has no material list, no cut list and no measurements in the steps.

The full 73-page plan adds all 19 build steps, each wall drawn stud by stud with a position table, the stepped stud lengths for the sloped walls, the pattern rafter marks, the deck, siding and sheathing piece maps, the door build, the ramp, and the shopping, cut and cutting lists. Its last pages list the 102 checks the measurements passed, from the framing closing to the drawings agreeing with the lists.

Before you build a 10×24 lean-to shed

• Permits. Size, height and setback rules vary by town and HOA, and at 240 sq ft and a 10′ 7 3/16″ high edge this shed is big enough that a permit is worth asking about. Call 811 before you dig, and check your local permit office before you buy lumber. The disclaimer on page 2 says this is common small-shed framing, not an engineered design.
• Placing it against a wall. This plan is a freestanding shed with four framed walls, not a lean-to that bolts to the house. If you set it beside a house or fence, the low back wall faces that wall, and so do the window and the low eave. The eave sticks out 7 1/2″ past the back wall, so leave room to reach in, paint the back wall and keep that eave clear of the house siding. Ask your local permit office whether there is a minimum distance from the house.
• Drainage. The whole 24 ft roof drains to the back. Next to a house, that water lands between the shed and your foundation, and the list has no gutter. Slope the ground away from the house, keep 6″ or more between the siding and the soil or mulch, and keep the drip edges clear.
• Snow and wind. Snow sits longer on a 3/12 roof. In heavy snow or high-wind areas you may need closer rafter spacing or larger rafters, so check your local permit office.
• Materials. Store lumber flat and covered, since wet wood decays faster (USDA Forest Products Laboratory Wood Handbook). Check the stamp on each OSB sheet for its span rating (APA: OSB).

Tools and ladders the plan lists

Beyond a circular saw with a rip guide, drill/driver and framing hammer, the list adds a miter saw for the door braces (set to 36 degrees) and trim, a reciprocating saw for flush cuts in the door and window openings, two bar clamps, 24″ or longer, a 3 lb sledge for the pad frame’s spikes and stakes, a hand tamper for the pad, and a steel bar about 3/4″ x 3 ft for turning the ground anchors. The front wall, front eave and rakes are out of reach from a 6 ft ladder, so the plan uses two 8 ft step ladders or a rolling scaffold tower. A 20 ft extension ladder handles roof work at the high edge, about 10′ 7″ up: load sheets at the low back eave, never the high front edge, and keep the ladder and yourself at least 10 ft from any overhead power line.

Related plans

• Same 10 ft depth, 4 ft narrower: the 10×20 lean-to shed plan.
• Same 10 ft depth, 6 ft narrower: the 10×18 lean-to shed plan.
• Same 24 ft width, 2 ft deeper: the 12×24 lean-to shed plan.
• The same 10×24 floor with a peaked roof: the 10×24 gable shed plan.
• Every size on the lean-to shed plans page.