DIY 12x14 Lean-To Storage Shed Plan

The full plan is $19.99: buy the 12×14 lean-to shed plan. To see the drawing style first, open the free 12×14 lean-to shed plan PDF.

12×14 lean to shed plans: the numbers for a site check

The 14 ft wall faces front, so the door and the tall side face the yard and the low eave drips at the back. Mark the 13′ 5 1/2″ roof depth on your lot, not just the 12 ft walls, before you check fences and property lines. The back wall is low on purpose: the front wall is the same 9′ 7″ tall wall as similar sheds, and the roof is steeper so shingles work, which brings the back down to 6′ 8″.

How to build a 12×14 lean-to shed: the stages in the plan

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: set the corner stakes and move one until both diagonals read 18′ 5 1/4″. Dig 4″ deep, then frame the pad with pressure-treated 4x6s laid flat, joined at the corners with two galvanized 10″ timber spikes each and pinned with rebar stakes. Fill the frame with 4″ of 3/4″ crushed stone, so the frame and the stone finish level with the lawn and rain drains away from the shed.

Every skid is a full 14 ft board and the four run left to right, 3′ 10 13/16″ on center. The 12 floor joists are 11′ 9″ long from 12 ft boards, so nothing in the base is spliced. The nailed floor frame weighs about 370 lb, so you build it in place on the skids and square it there instead of carrying it. Six sheets of tongue and groove plywood cover it, with a 1 1/2″ filler strip ripped from a 1×4 at the back rim.

How the walls go up: the tall wall method

Each wall is framed flat on the deck and raised as a bare frame, and the siding goes on after all four stand.

• The big lift first. The 9′ 7 1/8″ front wall goes up in one piece at about 230 lb with three people: all three lift, then the two at the ends hold it against the stop posts while the third sets the braces. The back and side walls take two.
• Stop posts on the rim. Once this wall stands, its top plate is out of reach. So you cut 2 stop posts about 4 ft long from one 2×4 x 8 ft and set them on the rim, each in line with a stud, before the lift. They stop the wall at plumb.
• Braces cut to about 9′ 5″. Cut 2 braces and lay them by their spots. Once the wall stands, the third person walks each up from its stake outside, then fastens its top from the deck, so the deck stays clear for the next wall.
• Ladders. Work the tall wall from 8 ft step ladders or a rolling scaffold tower, not a 6 ft ladder.
• Sloped side walls. Each wall has 10 studs of different lengths, from 6′ 5 3/8″ to 9′ 3 3/16″, with a 14.0 degree bevel under the sloped plate.

A lean-to side wall has no level plate to lap, so a twist strap ties each of the four corners.

What is on the 12×14 lean-to shed material list

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

• Foundation and floor: four 14 ft pressure-treated 4×4 skids, two 14 ft and twelve 12 ft pressure-treated 2×6 boards for the rims and joists, 6 sheets of tongue and groove plywood and two 8 ft 1x4s for the filler strip.
• Pad and ramp: 5 pressure-treated 4×6 x 16 ft boards for the pad frame, about 4.1 cu yd of 3/4″ stone, 30 rebar stakes, and pressure-treated 2×10, 2×6 and 2×4 boards for the ramp.
• Walls: 2×4 studs and plates (the tall front studs from 10 ft boards), a doubled 2×8 door header and a doubled 2×6 window header, plus 14 sheets of 5/8″ T1-11 in 4×8, 4×9 and 4×10 sizes. Order the 4×10 sheets ahead: many stores special-order them, and the front wall needs the full 120″ with no joint.
• Roof: 14 2×6 x 14 ft boards for the rafters and fly rafters, 2×6 blocking, lookout blocks, 7 sheets of OSB, 2 rolls of 15 lb felt, 8 bundles of shingles and 8 pieces of drip edge.
• Door, window and trim: 2 new T1-11 sheets for the door leaves, 6 T-strap hinges, a handle and latch, 2 barrel bolts, a threshold cap, 2 brush sweeps, hold-open hooks, the prefabricated window, 1×8 fascia from 16 ft boards, 1×4 casing and corner trim.
• Hardware: nails by the pound, 20 hurricane ties, 4 framing angles, 4 twist straps, 6 ground anchors, construction adhesive, flashing tape, drip cap, insect screen and 5 gallons of paint.

The list also counts the temporary braces, stakes and stop posts, and a cut list and cutting plan give every part’s length and the board it comes from. The longest boards are the 16 ft fascia stock and the pad frame. The yard may need to deliver them.

What you can fit in a 12×14 lean-to shed

The plan draws the floor to scale with the gear in it. Check the fit before you buy:

• Riding mower. A 42 in deck rider (4′ 7 3/16″ wide) clears each side of the open door by 8 1/8″. A 48 in deck fits with its deflector raised. A 54 in deck does not fit.
• Aisle and shelves. There is a 3′ 6″ aisle between the mower’s nose and the back shelves. Keep the back shelves below the window sill, 2′ 11 1/2″ above the deck.
• A long front wall. With the door in the 14 ft front, there are 4′ 0″ of wall on each side of it, tall enough to stand ladders, lumber and long-handled tools.
• The ramp. It is 6′ 9″ wide and 3′ 6″ out at a 1:6 slope, and its top sits about 13/16″ below the deck.
• Height. Tall items stand at the front wall, with 9′ 4 1/8″ clear. The back wall has 6′ 5″ clear.

How the 12×14 lean-to roof is framed

A single-slope roof has no ridge and pushes nothing outward, so no rafter ties cross the shed and the full height of the front wall stays open. A hurricane tie on every rafter end holds it down, with a framing angle at each of the 4 corners.

• Why 2×6. The plan sizes the rafters as 2×6 over the 11′ 5″ clear span at 16″ on center, in #2 spruce-pine-fir or Douglas fir-larch at 30 psf ground snow. It adds that #2 Southern yellow pine spans less (about 11′ 2″ in a 2×6), so in Southern pine, go up one size. Confirm the size and your snow load with your local permit office.
• Two birdsmouths. Each rafter hooks over both walls with a 3 1/2″ level seat and a 7/8″ plumb heel, 15% of a 2×6’s depth. Never cut deeper than one third.
• Pattern first. Cut one pattern rafter from a board of 13′ 10 5/16″, test it on both walls at each end, then cut the other 11 and the 2 fly rafters.
• Blocking. 2×6 blocks, ripped to 4 3/4″ tall, fill the bays over each wall. Drilled 1″ vent holes and a 1/4″ soffit gap let air through.
• Low pitch, double felt. At 3/12 the shingle makers ask for two layers: a 19″ starter strip, then 36″ courses lapping 19″ (Asphalt Roofing Manufacturers Association). The plan then lays 33 courses at 5″ exposure, about 184 shingles, which is 8 bundles with the starter.

Anchoring the shed

The plan says an empty 12×14 on loose skids slides at about 11 psf of wind (gusts near 60 mph) and tips at about 24 psf, so it has you anchor it once the roof is on, before you fill it. It uses 6 screw-in auger anchors, 30″ or longer, galvanized, each with a steel strap: 3 along each outside skid, at 1′ 0″, 7′ 0″ and 13′ 0″ from the left end. Check your local permit office for what your area asks.

Free 12×14 lean-to plan PDF vs the full plan

The free PDF is 8 pages: the stages with views of the shed and framing previews, without measurements. The full 69-page plan adds all 19 build steps, the stud tables, the stepped stud lengths for the sloped walls, the rafter marks, the deck and sheathing piece maps, the door build, the ramp, and the shopping, cut and cutting lists. The end of the plan lists its 87 checks, all passing: that the framing closes, the roof geometry works, the sheets and shingles cover every surface and the drawings agree with the lists.

Before you build a 12×14 lean-to shed

• Permits. At 168 sq ft and 11′ 1 5/16″ at the high edge, this shed is big enough that a permit is likely worth asking about, and size, height and setback rules vary by town and HOA. Check your local permit office before you buy lumber.
• 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; ask your local permit office.
• Skids. Use ground-contact rated pressure-treated 4x4s (UC4A or higher), set crown up, and shim a low skid with gravel or treated shims only.
• Keep it dry. Leave 6″ or more between the siding and the soil or mulch, and keep the low back eave and its drip edge clear.
• 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 reciprocating saw for the door and window openings, a 3 lb sledge for the pad frame’s spikes and stakes, two 24″ bar clamps for marking the rims, a 4 ft level, string line and a 25 ft tape. Two 8 ft step ladders cover the walls, rafters and front eave, or rent a rolling scaffold tower for those. A 20 ft extension ladder handles roof work at the high edge, about 11′ 1″ up.

Related plans

• 2 ft deeper: the 14×14 lean-to shed plan.
• 2 ft longer: the 12×16 lean-to shed plan. 4 ft longer: the 12×18 lean-to shed plan.
• Same size with a gable roof: the 12×14 gable shed plan.
• Choosing a base first? Read the shed foundation guide.
• Every size on the lean-to shed plans page.