How to Build a Compost Bin

Take a Saturday to make this compost bin using lumber and materials available at your local hardware store.

By backyard composting, your trash will become your garden's treasure. Throw your everyday kitchen scraps like banana peels, apple cores, coffee grounds, and egg shells into this DIY compost bin to create the ultimate plant food. This pallet-style bin looks attractive in any landscape and can be personalized with your choice of paint or stain.

Download the Compost Bin Diagram

  • Working Time 6 Hours
  • Start to Finish 1 Day
  • Difficulty         Projects Hard
  • Involves Cutting Wood, Drilling, Staining

What you need

Tools

  • Tape measure and pencil
  • Table saw or circular saw
  • Carpenter's square
  • Electric drill
  • Pocket-hole jig

Materials

  • 1 inch x 4 inch x 6 foot cedar board (x5)
  • 1 inch x 6 inch x 6 foot cedar board (x8)
  • 1 inch x 2 inch x 6 foot cedar board (x4)
  • 1 inch x 2 inch x 8 foot cedar board (x3)
  • Outdoor-rated wood glue
  • 1-1/4-inch deck screws
  • 1 x 2 x 40 scrap wood
  • 2-inch narrow outdoor hinges (x2)
  • 1-1/4-inch outdoor pocket screws
  • Exterior spray paint, optional
  • Outdoor gate latches (x2)
  • 120-grit sandpaper
  • Clear spray sealer

Cuts

  • Leg slats (x4)
    1 x 4 x 42-1/4 inches
  • 1 x 6-inch short slats (x8)
    1 x 6 x 34-1/2-inches
  • 1 x 2-inch short slats (x8)
    1 x 2 x 34-1/2 inches
  • 1 x 6-inch long slats (x6)
    1 x 6 x 36 inches
  • 1 x 2-inch long slats (x6)
    1 x 2 x 36 inches
  • 1 x 6-inch front slats (x4)
    1 x 6 x 5 inches
  • 1 x 2-inch front slats (x4)
    1 x 2 x 5 inches
  • Door rails (x2)
    1 x 2 x 21-1/2 inches
  • Door stiles (x2)
    1 x 2 x 20 inches
  • 1 x 6-inch door slats (x2)
    1 x 6 x 24-1/2 inches
  • 1 x 2-inch door slats (x2)
    1 x 2 x 24-1/2 inches
  • 1 x 2-inch door stops (x2)
    1 x 2 x 5-3/4 inches

How to do it

Step 1 Cut Wood Pieces

Following the above cut list, cut the leg slats, 1 x 6 short slats, 1 x 6 long slats, 1 x 2 long slats, 1 x 6 front slats, and 1 x 2 front slats.

Step 2 Assemble Legs

Join the long sides of two leg slats to make an L shape. Use a carpenter square to be sure that the legs are at a 90-degree angle. Secure with glue and 1-1/4-inch screws. Repeat so that you have four leg assemblies total.

Step 3 Assemble Sides

To ensure all the slats in the following steps are evenly spaced, use a 1 x 2 x 40-inch spacer block made from scrap wood. Lay two leg assemblies flat on a surface. Then glue and screw on a 1 x 6 short slat across the top of the legs, making sure all edges are flush. Find the position of the next slat by placing the spacer block along the bottom edge of the first slat. Attach a 1 x 2 short slat with glue and screws. Repeat with 1 x 6 and 1 x 2 short slats. The hinge that attaches the door dictates the next space. Use the hinges as a spacer to determine the placement of a third 1 x 2 short slat. There should be about a 1/4-inch space. Attach a 1 x 2 short slat with glue and 1-1/4-inch deck screws. Then slide the hinge out. Repeat, alternating 1 x 6 and 1 x 2 short slats to bottom of legs. Repeat to build a second side assembly. 

Step 4 Assemble Back

Starting at the top, use glue and deck screws to connect the two side assemblies with 1 x 6 and 1 x 2 long slats following the pattern and spacing for the first two sections. Make sure the slats are flush with the two side assemblies. This section will be the back of the compost bin.

Step 5 Start Front

For the front, begin by attaching a 1 x 2 long slat right below the hinges and finish the pattern downward, making sure the slats align with side assembly slats. Use glue and deck screws as before.

Step 6 Attach Front Edges

Beginning with the 1 x 2 front slat just above the hinges, work upward, attaching slats with glue and deck screws. Use the spacer block and hinges as a reference to alternate 1 x 2 front slats and 1 x 6 front slats. More importantly, make sure the front slats align with their coordinating slats on the side assemblies.

Step 7 Create Door Frame

Measure the empty area between the side slats to ensure the door rail will fit there. Measure the empty space between the top and the slat at the hinge spot to ensure the door stile will fit there. Trim the rail and stile as needed so that you have a 3/4-inch gap between the stile and the front slats. Make two pocket holes at each end of the stiles and rails. Use pocket holes to join the rails and stiles. This will be the frame for your bin door.

Step 8 Attach Door Slats

Lay the bin doorframe on a flat surface. Using the spacer block and starting with a 1 x 2 door slat at the bottom edge, attach door slats with glue and deck screws. For a cleaner look, attach the slats over the pocket holes of the door frame and drive the screws from the inside of the door.

Step 9 Attach Door Stops

Attach the door stops to the inside of the front leg pieces. For the cleanest finish, make sure the door stop piece is flush in the corner of the leg. Use glue and deck screws to attach securely.

Step 10 Attach Hardware

Paint the hinges to match the gate latch, if desired. Attach two hinges to the bottom of the door, each 3 inches in from the outside edge. Then attach the door to the top side of the middle long slat. Wait to attach the gate latch until you have secured the door to the rest of the structure. Sand and seal to finish.

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