A chicken coop door is a frame with hinges, a latch, and a way to seal it against predators

A working coop door has four parts: a wooden frame that fits your opening, hinges to swing it, a latch to hold it closed, and weatherstripping to block gaps. You can build one in an afternoon with basic tools—a drill, saw, measuring tape, and screwdriver. The door itself is usually plywood or boards, sized to fit snugly in the opening you've already cut in your coop wall, with an overlap of at least 2 inches on all sides so it covers the hole completely.

The most common design is a straightforward hinged door that swings outward or inward, with a hook-and-eye latch or a sliding bolt on the outside. Some people add a pop door—a smaller automatic door that opens at dawn and closes at dusk—but that's a separate system. This guide covers the manual hinged door, which is what most backyard coops use.

Key Takeaways

  • Measure your coop opening and build a frame 2 inches larger on all sides so the door overlaps and blocks the hole completely.
  • Use exterior-grade plywood or cedar boards, hinges rated for outdoor use, and a latch that can be operated from outside without reaching into the coop.
  • Weatherstripping around the frame stops drafts and gaps that predators can exploit.
  • Hang the door so it swings away from the coop interior, making it easier to open and harder for a predator to force inward.
  • Test the door weekly and oil the hinges every few months to keep it moving smoothly in cold or damp weather.

Measure the opening and plan your frame size

Start by measuring the hole you've cut in your coop wall. Write down the width and height in inches. Your door frame should be 2 inches wider and 2 inches taller than that opening—so if your hole is 12 inches wide by 18 inches tall, your frame will be 16 inches wide by 22 inches tall. That 2-inch overlap on all sides is what seals the coop and keeps predators from squeezing through gaps.

Decide which way the door will swing. Most people hang it to swing outward and away from the coop, so you're not reaching into the chicken space every time you open it. Mark which side will be the hinge side and which will be the latch side before you cut any wood.

Cut and assemble the frame

Use 2-by-2 inch lumber for the frame—it's strong enough and straightforward to work with. Cut four pieces: two for the top and bottom (the width of your frame), and two for the sides (the height of your frame). Lay them flat on a work surface in a rectangle and check that the corners are square by measuring diagonally from corner to corner—both measurements should be the same.

Drill pilot holes (small holes to guide the screw) at each corner, then drive 2.5-inch exterior-grade wood screws through the top and bottom pieces into the ends of the side pieces. Use at least two screws per corner. Exterior-grade screws won't rust in damp conditions the way regular screws will.

Once the frame is assembled, cut your door panel from exterior-grade plywood (3/8 inch thick is standard) or from cedar boards. Plywood is faster; boards look nicer and shed water better. Screw or nail the panel to the frame so it covers the entire frame and sits flush. Leave no gaps between the panel and the frame.

Install hinges on the frame

Buy two heavy-duty outdoor hinges—3-inch hinges are standard for a coop door. Position the first hinge 3 inches from the top of the door, and the second 3 inches from the bottom. Mark the screw holes with a pencil, drill pilot holes, and screw the hinges to the frame. Use the screws that come with the hinges; they're sized to fit.

Before you hang the door on the coop, test-fit it by holding it in place against the opening. The door should sit flat against the coop wall with no twists or gaps. If one corner is higher or lower than it should be, the frame may not be square—take it back to the work surface and check the diagonal measurements again.

Hang the door and attach the latch

Position the door in the opening so it overlaps evenly on all sides. Have a helper hold it steady, or prop it with shims (thin wedges of wood). Mark the screw holes from the hinges onto the coop wall with a pencil. Drill pilot holes into the coop frame, then screw the hinges to the coop. Use exterior-grade screws that are long enough to bite into solid wood—usually 2.5 inches.

Swing the door open and closed a few times. It should move smoothly without binding or dragging. If it sticks, the frame may be slightly twisted; loosen one hinge screw, adjust the door, and retighten.

Install a latch on the outside of the door, positioned so you can operate it without reaching into the coop. A hook-and-eye latch is the cheapest option and works well. Screw the hook to the door frame (the fixed part of the coop), and the eye to the door itself. A sliding bolt is stronger and faster to operate—screw the bolt to the door, and the strike plate to the frame. Position the latch about 4 feet high, or wherever you naturally reach when standing in front of the coop.

Seal gaps with weatherstripping

Measure around the inside edge of the door frame where it meets the coop wall. Buy adhesive-backed weatherstripping tape (the kind with foam or rubber) in that length. Clean the surface with a dry cloth, peel the backing, and press the tape firmly into place. This stops cold air, moisture, and small predators from finding their way through gaps.

Pay special attention to the bottom of the door, where the largest gaps usually form. If your coop sits on the ground, you may need to add a threshold—a strip of wood screwed to the bottom of the opening—so the door closes against something solid instead of settling unevenly.

Maintain the door through the seasons

Check the door every week to make sure the latch is holding and the hinges aren't loose. Tighten any screws that have backed out. In fall and winter, hinges can stiffen in cold or damp weather; oil them with a light machine oil or 3-in-1 oil every few months. Wipe off excess oil so it doesn't attract dirt.

If the door begins to sag—the bottom corner drifts away from the frame—the hinges may be wearing out or the frame may be twisting. Tighten the hinge screws first. If that doesn't help, you may need to replace the hinges or add a diagonal brace inside the frame to keep it square. A sagging door leaves gaps that predators can exploit, so don't ignore it.

Frequently Asked Questions

What size should the door opening be?

Most people cut an opening 12 to 14 inches wide by 16 to 18 inches tall—large enough for a chicken to pass through without squeezing, but small enough that you can build a sturdy door. Bantams need less space; standard breeds need more. Measure your birds and add 2 inches in each direction.

Can I use regular interior hinges instead of outdoor hinges?

No. Interior hinges rust quickly in damp conditions and won't hold up to the weight of a wet wooden door. Buy hinges labeled for outdoor or exterior use; they're zinc-plated or stainless steel and cost only a few dollars more.

What if my coop door won't close all the way?

The frame is probably twisted or the hinges are bent. Check that the door sits square in the opening by measuring the gaps on all sides—they should be even. If one corner is higher, loosen the top hinge screw slightly, adjust the door, and retighten. If the problem persists, the frame may need to be rebuilt.

Do I need a pop door if I already have a manual door?

No. A manual door is sufficient if you're home to open and close it every day. A pop door is useful if you travel or want to let chickens out at dawn without getting up early, but it's an extra expense and another thing to maintain. Many coops use only a manual door.

How do I winterize the door?

Make sure the weatherstripping is intact and the latch holds tight so cold air doesn't leak in. If your coop is in a very cold climate, you may want to add a second layer of plywood on the inside to increase insulation, but this is optional for most backyard setups. The main thing is keeping the door sealed and the hinges oiled so it operates smoothly in cold weather.