DIY 8x16 Lean-To Storage Shed Plan

The full plan is $19.99: buy the 8×16 lean-to shed plan. To see the drawing style first, open the free 8×16 lean-to shed plan PDF.

8×16 lean to shed plans: the numbers for a site check

Square the shed footprint stakes to matching 17′ 10 11/16″ diagonals before any stone goes down. The whole roof drains to the low back edge, so keep that side away from a fence you cannot reach and think about where the water goes.

How the 8×16 lean-to shed goes together

The three skids run along the 16 ft side, 3′ 10 1/4″ on center, and none of them needs a splice: the longest board on the list is 16 ft. The nailed floor frame weighs about 290 lb and racks out of square if you lift it, so the plan has you build it in place on the skids and square it there instead of carrying it.

How the walls go up

Book a third person for the front wall. All three start at the top plate on the gravel. The two end lifters keep hold while the middle person steps up onto the deck and takes the load again. Each end lifter then steps up in turn with two people supporting the frame.

Each wall is framed flat on the deck and raised as a bare frame, and the siding goes on after all four stand. On this plan the tall front wall goes up first, while it has the whole deck to itself.

• Stop blocks first. Before you tip up the front wall, nail temporary 2×4 stop blocks to the rim joist so the bottom plate cannot slide off the deck, and have the braces cut and ready.
• Hinge it. Drive two or three nails partly through the bottom plate into the deck at the tipping edge so the wall pivots instead of sliding.
• Brace from outside. 12 ft 2×4 braces run to stakes about 5 ft out, so the deck stays clear for the next wall. The list has 12 of them.
• Side walls drop in. Their plates are 1/4″ shorter than the gap between the front and back walls, so check those two for plumb first. If one is tight, tap it down against a block.
• Twist straps. A lean-to side wall has no level plate to lap, so a metal strap ties each sloped plate to an end-wall corner backer below the top plates.

Long studs and sloped side walls

The front wall’s 12 studs are 8′ 2 5/8″ long, so they come from 2×4 x 10 ft boards: the “8 ft stud” many stores sell is a 92 5/8 in precut and comes up short. Each side wall has 7 studs of different lengths, from 6′ 5 3/8″ to 8′ 3 3/16″, every top cut at a 14.0 degree bevel so the sloped plate sits flat on it. The sloped plate itself is a long parallelogram, 7′ 7 1/2″ along either edge, with both ends beveled the same way. 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 9′ 6 5/16″.

What is on the 8×16 shed material list

The shopping list is split by section, so you can buy the floor first and the roof later, in the stock lengths that waste the least:

• Foundation and floor: 3 pressure-treated 4×4 x 16 ft skids, 2 2×6 x 16 ft rims, 13 2×6 x 8 ft joists, 4 sheets of 3/4″ tongue and groove plywood and two 1x4s ripped to a 1″ filler strip for the back rim.
• Walls: studs and plates, a doubled 2×8 door header and a doubled 2×6 window header (each with a 1/2″ plywood spacer), plus 12 sheets of 5/8″ T1-11 in 4×8 and 4×9 sizes, so there is no horizontal joint across the high front wall.
• Roof: 15 2×4 x 10 ft boards for the 13 rafters and 2 fly rafters, 2×4 blocking and lookout blocks, 7 sheets of 7/16″ OSB, 1 roll of 15 lb felt for the double layer, 6 bundles of shingles and 6 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, the prefabricated window, 1×6 fascia, soffit strips cut from the plywood rip map and 1×4 casing and corner trim.
• Hardware: nails by the pound (23 lb of 16d framing nails alone), 22 hurricane ties, 4 framing angles for the end rafters, 4 twist straps, 7 tubes of adhesive, roofing cement, flashing tape, drip cap, insect screen and 4 gallons of paint.

The plan does not price the list, since costs change by region and month. Take it to your local lumber yard for a quote before you build.

What you can fit in an 8×16 lean-to shed

• Three zones. The 6 ft door is centered in the 16 ft front wall, starting 5 ft in from each corner, so the middle is your aisle with a storage bay on each side.
• Tall at the front. Ladders, long tools and tall shelving stand against the 8′ 7″ front wall. Lower shelving fits along the 6′ 8″ back wall, beside the window.
• A bench with daylight. The window is centered in the back wall, facing the door, with its sill 2′ 10″ above the bottom plate, so measure any bench or shelves against the sill before fastening them.
• Clear headroom. A lean-to roof needs no rafter ties, so nothing crosses the shed at wall height.
• Measure the widest part of the mower. With both leaves open the doorway is about 71 1/2 inches clear. The drawing parks a 42 inch deck mower that measures 55 3/16 inches across and 70 inches long. There is 8 1/8 inches beside each side as it enters. A wider machine needs its own measurement, including the discharge chute and attachments.
• Park nose first. Leave one inch between the mower and the back wall. An 18 inch cross aisle behind its tail connects the two storage bays. The optional 12 inch deep shelves, which are outside the material list, go to either side of the mower, leaving the middle of the back wall open.
• Leave room outside, too. The detachable ramp is 81 inches wide and projects 42 inches. Keep 9 ft 6 in level and clear from the wall so the mower can line up with it. The deck sits 9 3/4 inches above grade. Under the door stop there is 77 1/4 inches of clear height.

How the 8×16 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 hold the common rafters to the plates. Framing angles connect the end rafters at the four corners.

• Why 2×4. This plan sizes the rafters as 2×4 over the 7′ 5″ clear span at 16″ on center, in #2 spruce-pine-fir or Douglas fir-larch at 30 psf ground snow. Ask your local permit office for the snow load where you live.
• Two birdsmouths. Each rafter hooks over both walls with a 3 1/2″ level seat and a 7/8″ plumb heel, 24% of the rafter’s depth. Never cut deeper than one third.
• Pattern first. Mark the cuts from the front tail on one straight 2×4 (board 9′ 10 3/8″, top edge 9′ 9 1/2″), test it on both walls at each end of the shed, then cut 12 more and the 2 fly rafters.
• Tie the rake. The end rafters sit on the sloped side-wall plates and get nailed up through them every 16″, 6 nails per side, so the roof edge and the wall are tied together.
• Blocking. 2×4 blocks, ripped to 2 5/8″ tall, fill the bays over each wall and keep the rafters upright. Insect screen goes under the tails before the soffit, which stops 1/4″ off the siding as the vent gap.
• 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 high edge. Water runs away from the front edge, so its drip edge goes on top of the felt, like a rake. The last shingle course is trimmed flush with it, nailed 1″ below the edge and sealed with roofing cement.

Free 8×16 lean-to shed plan PDF vs the full plan

The free PDF walks through the five stages (foundation, floor, walls, roof, trim) with views of the shed at each stage and a framing preview. It has no materials list, no cut list and no measurements. The full plan has 28 numbered sections, 19 of them build steps. It includes the shopping and cut lists, the cutting plan, every beveled stud length for the sloped walls, the rafter marks table, the floor and roof sheet maps and the door build. The site drawing also shows the landing beyond the 18 x 10 ft gravel pad. The six anchor straps go on before the detachable ramp ledger: one strap sits behind its center, so the ledger screws go beside it. The matching parts and fastener lists give you the screws for both jobs.

Before you build an 8×16 lean-to shed

• Permits. At 128 sq ft and just under 10 ft at the high edge, size, height and setback rules still matter, and they 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, larger rafters or additional anchorage beyond the six anchors in this plan. Check your local permit office.
• Skids. Use ground-contact rated pressure-treated 4x4s (UC4A or higher), set crown up, and raise 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 check the shingles, caulk and paint every spring.
• 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, 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, two bar clamps for marking the rims, a 3 lb sledge for the brace stakes and a hand tamper for the pad. Two 6 ft step ladders cover the walls and rafters. A 20 ft extension ladder handles roof work at the high edge, about 9′ 11 1/2″ up.

Related plans

• Same footprint with a hip roof: the 8×16 hip roof shed plan.
• 2 ft shorter with a gable roof: the 8×14 gable shed plan.
• 4 ft shorter lean-to: the 8×12 lean-to shed plan. 2 ft deeper: the 10×16 lean-to shed plan.
• Choosing a base first? Read the shed foundation guide.
• Every size on the lean-to shed plans page.