How to Build a Chicken Coop for 4 Chickens | DIY Plans That Work

A well-built coop means healthy, safe birds and easier morning chores. Here’s exactly what you need—the dimensions, materials list, and build sequence that works for four standard-breed chickens.

What Size Coop Do Four Chickens Need?

Four standard chickens need a minimum of 16 square feet of indoor floor space (4 square feet per bird). A 4×4-foot footprint is compact enough to build in a weekend, yet large enough that your hens won’t feather-peck each other. The attached outdoor run should be at least 40 square feet (10 square feet per bird). Inside, plan for 32 to 48 inches of total roosting bar space (8–12 inches per bird). One or two nesting boxes, each at least 12×12×12 inches, will cover four hens. Minimum wall height is 2 to 3 feet; a 4-foot front wall with a sloped roof is a common budget-friendly design.

Materials and Tools You’ll Need

The total build runs $150 to $300 in materials if you DIY—prefab coops for four chickens range from $400 to $800. Here’s what to gather:

• Lumber: Pressure-treated 2×4s for skids (foundation), wall framing, and roof supports. 3/8-inch or 1/2-inch plywood for siding. 2×2s for ventilation framing.
• Roofing: Corrugated metal panels, two pieces 3 feet wide by 6 feet long. Cut one in half for two 4-foot sections.
• Hardware: 1/2-inch hardware cloth (never chicken wire—raccoons tear through it). Exterior hinges (four for pop door and maintenance panel). Carabiners or padlocks for raccoon-proof latches.
• Fasteners: 3-inch deck screws for framing, 1½-inch finishing nails for siding, carriage bolts for floor assembly.
• Tools: Circular saw, drill with a hole saw for vents, level, square, safety glasses, work gloves, hearing protection.

Building the Coop: Step-by-Step

These steps assume a 4×4-foot coop with an awning-style roof. Work on level ground—use concrete blocks or skids to keep the bottom off damp soil.

1. Prepare the foundation. Level the ground with a 4-foot level. Place concrete blocks in two parallel rows, 4 feet apart. Set two pressure-treated 2×4 skids on the blocks. Check diagonal measurements for square.
2. Build the base frame. Cut four 2×4s to 48 inches. Assemble a rectangle with 3-inch deck screws, pre-drilling to prevent splitting. Attach the floor platform with nails, screws, and carriage bolts.
3. Frame the walls. Front and back walls get three studs each; side walls get two. Cut a 24-inch-wide door opening in one wall. Assemble each wall flat, then raise and attach to the base frame.
4. Install ventilation. Cut openings 2 inches below the roof line on each end wall—minimum 6×12 inches each. Frame with 2×2 lumber. Cover with hardware cloth on the inside.
5. Attach siding and doors. Cut plywood panels and screw to the frame. Build the maintenance door with crossing plywood pieces; attach with two hinges. Install the pop door with its secure latch.
6. Build the roof. Add an extra 2×4 to the front wall to create a slope. Install corrugated metal panels with a 2-inch overhang on sides and 3/4 inch front and back to prevent water rot.
7. Finalize. Install the ramp. Cover all vents, windows, and gaps with hardware cloth. Bury fencing 12 inches underground to stop diggers.

If you’d rather buy than build, we’ve tested and compared the best ready-made options in our review of top chicken coops for four birds—including setup time, durability, and predator resistance.

How to Avoid the Three Most Common Coop Mistakes

These errors show up every season. Skip them and your coop lasts years longer.

• Undersizing. Less than 4 square feet per bird causes stress, feather pecking, and respiratory issues. Stick with the 4×4 footprint.
• Using chicken wire. Raccoons rip through standard chicken wire in minutes. Always use 1/2-inch hardware cloth on every opening, buried 12 inches deep.
• Poor ventilation. Low vents trap ammonia fumes, causing respiratory disease. Place vents high (2 inches below the roof) with at least 1 square foot per 10 square feet of floor. In winter, cover with clear plastic to hold heat while allowing airflow.