Free 12 x 8 Wood Shed Plan With Illustrations, Blueprints & Step By Step Details

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Basic 12’ x 8’ Wood Shed Plan

This 8 × 12-ft. shed features a simple gable roof, double doors, and side and rear windows for natural lighting. With full-height walls and doors, there’s ample room for storing large items or creating a comfortable work space. An optional wood ramp helps in moving lawn mowers and other heavy equipment.

The shed’s simple construction makes it especially adaptable for different uses. For example, you can easily frame in additional windows—to use the shed as a workshop or potting shed—or omit all of the windows and devote the space entirely to secure storage.

The finish materials for the basic shed also are true to its name: asphalt roof shingles, plywood siding, and simple trim details are appropriately practical for this classic outbuilding design. You can purchase prehung doors or build your own using the project plans.

Free 12 x 8 Wood Shed Plan

MATERIALS & CUTTING LISTS:

Materials 
Description Quantity/Size Material
Foundation 
Drainage  material 1.4 cu. yd. Compactible  gravel 
Skids 3 @ 12′-0″ 4 × 4 treated  timbers 
Floor Framing 
Rim joists 2 @ 12′-0″ 2 × 6 pressure treated 
joists 10 @ 8′-0″ 2 × 6 pressure treated 
Floor  sheathing 3 sheets, 4 ×  8′ 3/4″ tongue-&- groove ext.-grade  plywood 
Joist clip  angles 20 3″ × 3″ × 3″ ×  16-gauge  galvanized 
Wall Framing 
Bottom  plates 2 @ 12′-0″, 1  @ 8′-0″ 2 × 4 
Top plates 4 @ 12′-0″, 4  @ 8′-0″ 2 × 4 
Studs 40 @ 92 5/8″ 2 × 4 
Headers 2 @ 10′-0”, 2  @ 6′-0″ 2 × 6 
Header  spacers 1 @ 9′-0″, 1 @  6′-0″ 1/2″ plywood—5″  wide 
Gable Wall Framing 
Top plates 2 @ 8′-0″ 2 × 4 
Studs 2 @ 8′-0″ 2 × 4 
Roof Framing 
Rafters 22 @ 6′-0″ 2 × 6 
Metal  anchors— rafters 10, with nails Simpson H1 
Rafter ties 3 @ 8′-0″ 2 × 4 
Ridge board 1 @ 14′-0″ 2 × 8 
Lookouts 1 @ 8′-0″ 2 × 6 
Subfascia 1 @ 8′-0″, 2 @  10′-0” 2 × 6 
Soffit nailers 3 @ 8′-0″ 2 × 2 
Exterior Finishes 
Plywood  siding 10 sheets @ 4  × 9′ 5/8″ texture 1-11  plywood siding, grooves 8″ o.c. 
Z-flashing 2 pieces @ 8  ft. Galvanized—18  gauge 
Wall &  corner trim 10 @ 10′-0″ 1 × 4 S4S cedar 
Fascia 8 @ 8′-0″ 1 × 8 S4S cedar 
Plywood  soffits 2 sheets @ 4 ×  8′ 3/8″ cedar or fir  plywood 
Soffit vents 4 @ 4 × 12″ Louver with bug  screen 
Flashing  (door/window  trim) 8 linear ft. Galvanized—18  gauge 
Roofing
Roof  sheathing 6 sheets @ 4 ×  8′ 1/2″ ext.-grade  plywood 
Asphalt  shingles 150 sq. ft. 250# per square  (min.) 
15# building  paper 150 sq. ft. 
Metal drip  edge 2 @ 14′-0″, 4  @ 6′-0″ Galvanized metal 
Roof vents  (optional) 2 units 
Door 
Frame 2 @ 8′-0″, 1 @  6′-0″ 3/4 × 4 1/4″  (actual) S4S  cedar 
Stops 2 @ 8′-0″, 1 @  6′-0″ 1 × 2 S4S cedar 
Panel  material 12 @ 8′-0″ 1 × 6 T&G V-joint  S4S cedar 
Z-brace 4 @ 6′-0″ 1 × 6 S4S cedar 
Construction  adhesive 1 tube 
Exterior trim 2 @ 8′-0″, 1 @  6′-0″ 1 × 4 S4S cedar 
Interior trim  (optional) 2 @ 8′-0″, 1 @  6′-0″ 1 × 2 S4S cedar 
Strap hinges 6, with screws Exterior hinges 
Windows 
Frames 5 @ 6′-0″ 3/4 × 4 1/4″  (actual) S4S cedar 
Mullion 1 @ 3′-0″ 2 × 4 S4S cedar 
Stops 10 @ 6′-0″ 1 × 2 S4S cedar 
 Glazing tape30 linear ft.Glazing tape 
Glass 3 pieces—field  measure 1/4″ clear,  tempered 
Window  muntins  (optional) 3 @ 8′-0″ 1 × 1 S4S cedar 
Exterior trim 5 @ 8′-0″ 1 × 4 S4S cedar 
Interior trim  (optional) 5 @ 8′-0″ 1 × 2 S4S cedar 
Ramp (Optional) 
Pads 2 @ 6′-0″ 2 × 8 pressure treated 
Stringers 1 @ 8′-0″ 2 × 8 pressure treated 
Decking 7 @ 6′-0″ 2 × 4 pressure treated 
Fasteners 
16d common  nails 16 lbs. 
10d common  nails 1 lb. 
10d  galvanized  casing nails 1 lb. 
8d common  nails 1/2 lb. 
8d box nails 3 lbs. 
8d  galvanized  box nails 1 1/2 lbs. 
8d  galvanized  finish nails 7 lbs. 
3d  galvanized  box nails 1/4 lb. 
7/8″  galvanized  roofing nails 2 lbs 
1 1/2″ joist  hanger nails 80 nails 
1 1/4″ wood  screws 70 screws 
3 1/2″ deck  screws 12 screws 
3″ deck  screws 50 screws 
2 1/2″ deck  screws 40 screws 
1 1/4″ deck  screws 30 screws 
Silicone latex caulk 1 tube 

DRAWINGS, ELEVATIONS & DETAILS

FRONT And LEFT SIDE FRAMING ELEVATION:

FRONT And LEFT SIDE FRAMING ELEVATION

REAR & RIGHT SIDE FRAMING ELEVATION:

REAR & RIGHT SIDE FRAMING ELEVATION:

Building section:

Building section

Aafter Template:

rafter template

Floor Framing Plan:

Floor Framing Plan

Floor Plan:

Floor Plan

Front & Left Elevation:

Front & Left Elevation

Rear & Right Elevation:

Horizontal Trim Detail:

Horizontal Trim Detail

Door Jamb Detail:

Door Jamb Detail

Gable Overhang Detail:

Gable Overhang Detail

Eave Detail:

Eave Detail

Window Jamb Detail:


Window Jamb Detail

Ramp Detail (Optional):

Ramp Detail (Optional)

Door Elevations:

Door Elevations

12 x 8 Wood Shed Plan Step By Step Instructions

BUILDING THE BASIC SHED

Step 1: Build the Foundation & Floor Frame

1. Excavate the building site and add a 4″ layer of compactible gravel. If desired, add an extension to the base for the optional  wood ramp. Tamp the gravel thoroughly, making sure it is flat and  level.  

2. Cut three 4 × 4 treated timber skids at 144″. Arrange and level the skids on the gravel bed, following the FLOOR FRAMING PLAN.  

3. Cut two 2 × 6 rim joists at 144″ and ten joists at 93″. Mark the joist layout onto the rim joists, following the plan. Assemble frame  with 16d galv. common nails; be sure to check each joist for  crowning and install it with the crowned edge up.  

4. Set the floor frame on top of the skids and measure the diagonals to make sure it’s square. Install metal clip angles at each  joist along the two outer skids, using 1 1/2″ joist hanger nails and  16d galv. common nails, and toenail each joist to the center skid  with 16d galv. nails.  

5. Install the tongue-and-groove floor sheathing, starting with a full sheet at one corner of the frame. Use 8d galv. nails driven every 6″  along the edges and every 12″ in the field.  

Secure the joists to the outer skids with angles. Drive hanger nails  into the joists and 16d nails into the skids. Frame and raise the walls, then fasten adjacent walls together at  the corner studs. 

Step 2: Frame the Walls 

1. Snap chalk lines on the floor for the wall plates. 

2. Cut the 2 × 4 wall plates: four at 144″ for the side walls and four at 89″ for the front and back walls.  

3. Mark the stud layouts onto the plates following the FLOOR PLAN. 

4. Cut twenty-seven studs at 92 5/8″, and cut six at 81 1/2″ to serve as jack studs.  

5. Build three headers with 2 × 6s and 1/2″ plywood: one at 65″ for the door opening, one at 67″ for the right side window, and one at  35″ for the rear window.  

6. Assemble, raise, and brace the walls one at a time, then add the double top plates.  

Step 3: Frame the Roof 

1. Cut two pattern rafters, following the RAFTER TEMPLATE. Test-fit the rafters using a 2 × 8 spacer block, then cut the remaining  twelve common rafters. Cut eight rafters for the gable end  overhangs—these do not have bird’s mouth cuts.  

2. Cut the 2 × 8 ridge board at 156″. Draw the rafter layout onto the top plates and ridge board, using 16″ on-center spacing. The  outsides of the outer common rafters should be 6″ from the ends of  the ridge board.  

3. Install the rafters. Reinforce the rafter-wall connection with metal anchors—install them on all but the outer common rafters.  

4. Cut three 2 × 4 rafter ties at 96″, and clip the top outer corners so they won’t project above the rafters. Position each tie next to a  pair of rafters as shown in the FRAMING ELEVATIONS. Facenail each  tie end to the rafter with three 10d nails, then toenail each tie end  to the top wall plate with two 8d nails.  

5. Cut the gable-wall plates to reach from the ridge to the wall plates. Install the plates with their outside edges flush with the  outer common rafters. Cut and install the gable studs, following the  FRAMING ELEVATIONS. 

Fasten the bottom ends of the common rafters to the wall plates  with metal anchors.  Attach lookouts to four of the overhang rafters, then nail the  overhang rafters to the outer common rafters. 

Step 4: Build the Gable Overhangs 

1. Cut twelve 2 × 6 lookouts at 3″. Endnail the lookouts to each of the inner overhang rafters, using 16″ on-center spacing (see the  GABLE OVERHANG DETAIL).  

2. Facenail the inner overhang rafters to the outer common rafters with 10d nails.  

3. Fasten the outer overhang rafters to the ridge and lookouts, using 16d nails.  

Step 5: Install the Fascia, Sheathing & Roofing

1. Cut and install the 2 × 6 subfascia along the eaves (see the EAVE DETAIL). Keep the ends flush with the outsides of the overhang  rafters, and the bottom edges flush with the bottom rafter edges;  use 16d nails.  

2. Install the 1 × 8 fascia along the gable overhangs, then along the eaves, holding it 1/2″ above the rafters so it will be flush with the  sheathing; use 6d galv. finish nails.  

3. Install the 1/2″ plywood sheathing, starting at a lower corner of the roof; use 8d box nails driven every 6″ along the edges and  every 12″ in the field of the sheets.  

4. Attach metal drip edge along the eaves, then apply 15# building paper over the sheathing. Add dripedge along the gable ends, over  the paper.  

5. Install the asphalt shingles, starting at the eave edge. If desired, install roof vents.  

Install the plywood roof sheathing after installing the fascia. Nail  every 6″ at the edges and every 12″ in the field.  

Rip the soffit panels to fit between the wall plates and fascia. Fasten  the panels to the nailers, rafters, and subfascia. 

Step 6: Install the Soffits & Siding 

1. Cut twelve 2 × 2 nailers to fit between the rafters, as shown in the EAVE DETAIL. Fasten the nailers between the rafters with 10d  facenails or 8d toenails.  

2. Rip the 3/8″ plywood soffit panels to fit between the wall framing and the fascia. Fasten the soffits to the rafters with 3d galv. box  nails.  

3. Cut holes for four soffit vents: locate one vent in each of the two outer rafter bays, along the eave, on both sides of the building.  Install the soffit vents.  

4. Install the plywood siding, using 8d galv. finish nails. Butt the top edges of the siding against the soffits. Don’t nail the siding to the  rear-window and door headers in this step. At the gable ends,  install Z-flashing along the top edge of siding, then continue the  siding up to the soffits.  

Note: Along the side walls, 8-ft. siding will cover the floor plywood  by about 1/2″ (this is necessary); if you want the siding to cover  the floor framing, use 4 × 9-ft. sheets.  

Step 7: Build & Install the Doors 

1. Cut out the bottom plate from the door opening. 

2. Cut the door frame pieces from 3/4″ × 4 1/2″ (actual dimension) cedar: cut the head jamb at 61 1/4″ and the side jambs at 81 7/8″.  Assemble the frame by screwing through the head jamb and into  the side jambs with 2 1/2″ deck screws.  

3. Cut 1 × 2 stops and install them inside the jambs with 1 1/4″ deck screws or 3d galv. finish nails. If the doors will swing out,  install the stops 2 1/4″ from the outside edges of the frame; if  they’ll swing in, install the stops 2 1/4″ from the inside edges.  

4. Install the door frame in the rough opening, using shims and 10d galv. casing nails. Make sure the frame is square and plumb.  

5. Cut twelve pieces of 1 × 6 tongue-&-groove boards at 81 3/4″. For each door, fit together six boards with their ends flush, then  mark the two end boards for trimming so that the total width is 30″.  Trim the end boards. 

6. Cut the Z-brace boards following the DOOR ELEVATIONS. Lay the doors on a flat surface and attach the brace boards using  construction adhesive and l 1/4″ wood screws.  

7. Install the hinges and hang the door, using shims to set the gaps at the bottom and top of each door.  

8. Install flashing above the door, nail-off the siding, then install the 1 × 4 door trim, using 8d galv. finish nails.  

Use pairs of tapered shims to plumb and level the door frame in the  rough opening.  

Assemble the window frames with screws. Add a 2 × 4 mullion in  the center of the side window frame.  

Step 8: Build & Install the Windows & Trim 

Note: If you’ve bought prehung windows for the shed, install them  following the manufacturer’s directions. To build homemade  windows, use the following directions.  

1. For each window, cut the 3/4″ × 4 1/4″ frame stock to form a rectangular frame with outer dimensions that are 1/2″ shorter and 

narrower than the rough opening. Assemble the frame with 2 1/2″  deck screws. Cut and install a 2 × 4 mullion in the center of the  frame for the side-wall window.  

2. Install each window frame in its rough opening, using shims and a level to make sure the frame is plumb and level and the jambs  are straight. Fasten the frame with 10d galv. casing nails.  

3. Cut the 1 × 2 stops. Bevel the outer sill stops as shown in the WINDOW JAMB DETAIL. Attach the inner stops with 6d galv. finish  nails. Order the glass to fit.  

4. Install the glass and outer stops, applying glazing tape to the stops on both sides of the glass. Install the 1 × 4 window trim.  

5. Install the horizontal 1 × 4 trim as shown in the ELEVATIONS. Fasten the trim with 8d galv. finish nails.  

6. Install the 1 × 4 corner trim so that it butts against the horizontal trim and extends to the bottom edges of the siding.  

7. Caulk along all trim joints, where trim meets siding, and around the door and window trim.  

Step 9: Build the Ramp (Optional) 

Determining the width and length (and thus the slope) of the ramp  is up to you, but here is the basic construction procedure:  

1. Determine the best slope for the ramp using boards or plywood set on the ground and the shed floor. Mark the ground to represent  the end of the ramp.  

2. Cut two 2 × 8 pads to the full width of the ramp. 

3. Measure the distance from the ground to the shed floor; subtract 2″ from that dimension to get the height of the tapered stringers.  

4. Use the ground marking to determine the length of the stringers—be sure to account for the 1 1/2″ thickness of the  decking. Cut the tapered stringers from 2 × 8 lumber: cut one for  each end and one for every 16″ to 24″ in between.  

5. Attach the pads to the stringers with 16d galv. nails driven through the bottom faces of the pads and into the stringers. 

6. Cut 2 × 4s for the ramp decking—the number needed depends on the length of the sloping sides of the stringers. Allow for a 1/8″  gap between decking boards when calculating the number needed.  

7. Attach the decking boards to the supports with 16d galv. nails or 3″ deck screws, maintaining a 1/8″ gap between boards.  

8. Set the ramp in place against the shed and fasten it by toenailing through the end stringers and top decking board with 3 1/2″ deck  screws.  

Build the ramp with pressure-treated 2 × 8s and 2 × 4s, following  the plan’s size or building it to a custom size.

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12 x 8 Wood Shed Plan PDF

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