A straightforward door keeps predators out and chickens in

A chicken coop door is a hinged or sliding panel that closes off the entrance to protect your flock at night and during bad weather. The easiest design for a first-time builder is a sliding door — it requires no hinges, moves smoothly on a wooden track, and closes with a straightforward hook-and-eye latch. A hinged door takes more carpentry but swings open like a cabinet door and is easier to walk through when you need to enter the coop.

Both styles can be built from scrap lumber and hardware you may already have. The door itself is typically 12 to 18 inches wide and 12 to 16 inches tall — sized to fit your coop's entrance hole. Most backyard builders choose a sliding door because it is faster to build, requires fewer tools, and is less likely to sag over time.

Key Takeaways

  • A sliding door is the fastest option for a beginner and requires only two pieces of wood for the track, four pieces for the frame, and a hook-and-eye latch.
  • Measure your coop's entrance hole before you cut any wood, and make the door about one-quarter inch smaller on all sides so it slides without binding.
  • Use exterior-grade wood or treat regular lumber with a non-toxic sealant to prevent rot from rain and chicken moisture.
  • A hinged door takes more time but works better if you need to step inside the coop regularly to collect eggs or clean.

Measure your entrance hole and plan the door size

Before you buy or cut any wood, measure the opening in your coop where the door will go. Use a tape measure to find the width and height of the hole. Write down both numbers — you will subtract one-quarter inch from each measurement to give the door room to slide or swing without jamming.

For example, if your hole is 14 inches wide and 16 inches tall, your door frame should be 13.75 inches wide and 15.75 inches tall. This small gap prevents the door from sticking when wood swells from moisture or temperature changes. Check that the hole is square by measuring corner to corner diagonally — both diagonal measurements should be the same. If they are not, your coop frame is out of square, and you may need to shim the door track to make it work.

Build a sliding door with a wooden track

A sliding door moves on two wooden rails — one at the top and one at the bottom of the opening. Start by cutting two pieces of 1-by-2 lumber to the width of your entrance hole. These are your top and bottom tracks. Screw them to the coop frame so they are level and parallel to each other, with the bottom track about 16 inches below the top track (or whatever your door height is).

Next, build the door frame itself. Cut four pieces of 1-by-2 lumber: two for the sides (the height of your door) and two for the top and bottom (the width of your door). Lay them flat on a workbench in a rectangle and screw the corners together with 1.5-inch exterior-grade screws — two screws per corner. Check that the frame is square by measuring corner to corner; both diagonals should be equal. Attach a piece of hardware cloth or plywood to one side of the frame to create a solid panel. If you use plywood, drill a few small holes in it so air can flow through the coop.

Slide the finished door into the top track first, then lower it into the bottom track. It should move smoothly with light pressure. If it binds, check that both tracks are level and parallel. Sand any rough spots on the door edges or inside the tracks. Once the door slides freely, install a hook-and-eye latch on the outside of the coop to hold it closed at night.

Build a hinged door if you need to enter the coop

A hinged door swings open like a regular door and is better if you need to step inside regularly. You will need two exterior-grade hinges rated for outdoor use — 2-inch hinges work well for a small coop door. Build the door frame the same way as the sliding door: four pieces of 1-by-2 lumber screwed at the corners, with plywood or hardware cloth attached to one side.

Decide which side of the opening the door will swing from. Screw one hinge to the door frame about 2 inches from the top and another about 2 inches from the bottom. Then hold the door in the opening and mark where the hinge screws will go on the coop frame. Remove the door, screw the hinges to the coop frame, and rehang the door. It should swing freely without rubbing the frame. Install a hook-and-eye latch or a barrel bolt on the opposite side to hold it closed.

Seal the wood to prevent rot and weather damage

Chicken coops are wet environments — moisture from droppings, spilled water, and rain will rot untreated wood within a year or two. Before you install the door, brush or spray all exposed wood with a non-toxic exterior sealant or paint. Do not use pressure-treated lumber that contains arsenic or other chemicals; chickens peck and scratch wood surfaces, and those chemicals can poison them.

Good options include linseed oil, exterior latex paint, or a clear polyurethane sealer rated for outdoor use. explore at least two coats, letting each coat dry completely before adding the next. Pay special attention to the bottom edge of the door and the inside of the tracks — these areas stay wet longest and rot first. Reapply sealant every two to three years, or whenever you notice bare wood showing through.

Install a latch that is straightforward to use in the dark

Your latch needs to be strong enough to hold against a determined raccoon or fox, but straightforward enough to operate by feel when you are closing the coop at dusk. A hook-and-eye latch is the standard choice — the hook slides into an eye bolt screwed to the coop frame. Install it on the outside of the door so predators cannot reach it from inside the coop.

Screw the eye bolt to the coop frame at about shoulder height (so you do not have to bend down to reach it). Screw the hook to the door so it lines up with the eye when the door is closed. Test it several times to make sure it catches smoothly and holds tight. Some builders add a second hook lower down for extra security, or use a barrel bolt instead, which is a sliding metal rod that locks into a catch. Either way, practice closing it in daylight so you can do it by touch at night.

Common mistakes to avoid

The most common error is making the door too large — it will jam in the tracks or bind on the frame. Always subtract one-quarter inch from each measurement. The second mistake is using untreated wood indoors; it will rot within months. Treat all wood before installation, even if it looks dry.

A third mistake is installing the tracks or hinges out of level or square. Take time to check with a level and a tape measure before you screw anything down. If the tracks are not parallel, the door will bind halfway through its travel. Finally, do not rely on a latch that requires two hands to close — you may be carrying feed or eggs when you close the coop, and a one-handed latch is much more likely to actually get used every night.

Frequently Asked Questions

What size should the door be?

The door should be 12 to 18 inches wide and 12 to 16 inches tall — large enough for a chicken to pass through easily, but small enough to close off the entrance completely. Measure your coop's entrance hole and subtract one-quarter inch from both the width and height so the door slides or swings without jamming.

Can I use regular indoor wood for the door?

No. Indoor wood will rot within a year in a chicken coop because of moisture from rain, droppings, and spilled water. Use exterior-grade lumber or treat regular wood with a non-toxic outdoor sealant before installation. Never use pressure-treated wood containing arsenic — chickens peck wood surfaces and can ingest the chemicals.

How do I keep the door from sagging over time?

A sliding door does not sag because it is supported by the tracks on both sides. A hinged door can sag if the hinges are too small or the door is too heavy. Use two hinges rated for outdoor use, and check that the door hangs straight a few weeks after installation. If it sags, you may need larger hinges or a support brace underneath.

What if my coop entrance is not square?

If the diagonal measurements of your entrance hole are not equal, the frame is out of square. You can still install a sliding door by shimming the tracks — slip thin wooden shims under the bottom track until both diagonals are equal. For a hinged door, shim the hinge side of the frame so the door hangs straight.

Do I need to oil or maintain the door after I build it?

Reapply sealant or paint every two to three years, or whenever bare wood shows through. Check the tracks or hinges once a year for rust or damage, and clean out any debris that might jam the door. A little maintenance now prevents rot and keeps the door working smoothly for years.