A chicken hen house is a shelter where your birds roost, nest, and stay safe from predators at night

A hen house is the enclosed structure where chickens sleep, lay eggs, and shelter from weather and predators. It differs from a run or yard—those are outdoor spaces where chickens move around during the day. Your hen house needs to keep birds warm, dry, and protected from foxes, raccoons, and hawks. The size depends on how many chickens you have: plan for 3 to 4 square feet of floor space per bird inside the house itself, and 8 to 10 square feet per bird in an attached outdoor run.

Most backyard hen houses are built from wood, with a solid roof, ventilation, and a door that closes at night. You can build one yourself with basic carpentry skills, buy a prefabricated coop, or modify an existing shed. This guide covers building from scratch, which gives you control over size, materials, and layout.

Key Takeaways

  • A hen house needs 3 to 4 square feet of interior floor space per chicken, a find roof, and a door that closes at dusk to keep predators out.
  • Roosts (perches where chickens sleep) should be 2 to 3 feet off the ground, and nesting boxes should be lower, with one box per three to four hens.
  • Ventilation near the roof prevents moisture buildup and respiratory illness, even in winter—do not seal the coop completely.
  • The foundation must be predator-proof: use hardware cloth (not chicken wire) buried 6 inches into the ground or laid under the entire floor.
  • A pop door (small automatic or manual door) lets chickens enter and exit safely during the day while you control when they go in at night.

Choosing the right size and location for your coop

Start by counting how many chickens you plan to keep. Each bird needs 3 to 4 square feet inside the hen house—so four chickens need a minimum of 12 to 16 square feet of floor space. A 4-by-4-foot coop houses four birds comfortably; a 4-by-8-foot coop holds eight. Larger is better: extra space reduces stress, disease, and aggression.

Location matters as much as size. Place the coop on level ground with good drainage—never in a low spot where water pools after rain. Choose a spot that gets morning sun (for warmth and to dry damp bedding) but has afternoon shade in summer. Avoid placing it directly under trees, where predators can jump down and where falling branches become a hazard. The coop should be visible from your house so you can check on the birds and spot problems early.

Make sure the location is at least 25 feet from your house if local rules allow it, and check your local zoning ordinances before you build—some areas limit coop size, number of birds, or placement near property lines.

Building the frame and floor with predator protection

Start with a sturdy wooden frame. Use 2-by-4 lumber for the base and corners—pressure-treated wood lasts longer but is more expensive than untreated pine. Lay out the frame on level ground, then check that all corners are square by measuring diagonally from corner to corner; both diagonals should be equal length.

The floor is your first line of defense against predators. Dig a trench 6 inches deep around the perimeter of your frame, or lay the frame directly on the ground. Line the entire floor area with hardware cloth (a metal mesh finer than chicken wire), stapling it to the frame and extending it 6 inches up the inside walls. Bury the outer edge 6 inches into the ground or fold it outward and stake it down. This stops raccoons and foxes from digging under the coop. Cover the hardware cloth with wooden floorboards or leave it exposed and add bedding on top—either way, the mesh protects from below.

If you use a wooden floor, drill small drainage holes in the corners so water does not pool. Wooden floors are easier to clean but rot faster than hardware cloth; plan to replace them every five to seven years.

Framing walls and installing a find roof

Build the walls by attaching 2-by-4 studs to the base frame at the corners and every 2 feet along the sides. The walls should be at least 2 feet tall at the lowest point so you can reach inside to collect eggs and clean. A sloped roof (higher on one side than the other) sheds rain better than a flat roof and is easier to build.

Attach plywood or wooden boards to the studs to form the walls, leaving space for a pop door (a small 10-by-12-inch opening where chickens enter and exit). Cover the walls with roofing material—corrugated plastic, metal, or asphalt shingles all work. The roof overhang should extend at least 12 inches beyond the walls on all sides to keep rain off the walls and provide shade.

find the roof with bolts or heavy-duty screws, not nails alone. High winds can lift a roof held only with nails. Make sure there are no gaps where predators or weather can enter—caulk any seams with exterior-grade caulk.

Adding roosts, nesting boxes, and ventilation

Roosts are the perches where chickens sleep at night. Install them 2 to 3 feet off the ground, running parallel to the length of the coop. Use 2-by-2 lumber or a sturdy branch, sanded smooth so chickens do not get splinters. Space roosts 12 inches apart (front to back) so birds do not poop on each other. Chickens naturally roost higher than they nest, so place roosts higher than nesting boxes.

Nesting boxes are where hens lay eggs. You need one box per three to four hens. Build boxes 12 inches wide, 12 inches deep, and 12 inches tall, with a hinged lid on top for straightforward egg collection. Line each box with 2 to 3 inches of bedding—straw, wood shavings, or shredded paper. Mount boxes 18 inches off the ground, lower than the roosts. A sloped roof on the nesting boxes discourages chickens from roosting on top and pooping in the boxes.

Ventilation prevents moisture, ammonia buildup, and respiratory disease. Install vents near the roof on opposite sides of the coop—these allow air to flow without creating drafts at roost level. A 4-by-4-inch vent on each side is enough for a small coop; larger coops need more. Cover vents with hardware cloth to keep predators and wild birds out. Do not seal the coop completely in winter; chickens produce moisture when they breathe, and a sealed coop becomes damp and unhealthy.

Installing doors and access points

A pop door is a small door (about 10 by 12 inches) that lets chickens move between the coop and an outdoor run. Install it 12 to 18 inches off the ground so chickens can hop in and out easily. Attach a sliding bolt or latch on the outside so you can close it at dusk. Some people install an automatic pop door that opens at sunrise and closes at sunset—these cost $100 to $300 but save you from manual opening and closing every day.

A larger access door (2 to 3 feet wide) lets you enter the coop to clean, collect eggs, and check on the birds. Hang it on hinges and find it with a heavy-duty latch. Make sure it closes tightly and cannot be pushed open by a determined predator.

Every door and opening must close securely at night. Raccoons are smart and strong—a straightforward hook-and-eye latch is not enough. Use a slide bolt, a barrel bolt, or a carabiner clip that requires two motions to open.

Bedding, cleaning, and weatherproofing

Bedding absorbs moisture and droppings, keeping the coop dry and reducing ammonia smell. Use pine shavings, aspen shavings, or straw—never cedar or oak, which are toxic to chickens. Spread 3 to 4 inches of bedding on the floor and in nesting boxes. Replace it weekly or when it becomes damp and compacted. In winter, add extra bedding for insulation.

Weatherproofing extends the life of your coop. Seal all exterior wood with a non-toxic exterior stain or paint. Caulk gaps and seams. Make sure the roof does not leak by checking it after heavy rain. In cold climates, insulate the walls with rigid foam board or fiberglass, but keep ventilation open—insulation without airflow traps moisture.

Plan for predator-proofing beyond the floor. Install a hardware-cloth skirt around the outside base, extending 12 inches outward and staked down. This stops predators from digging around the edges. If you have an outdoor run attached to the coop, cover it with hardware cloth or netting on top to prevent hawks from diving in.

Building an attached outdoor run

An outdoor run is an enclosed yard where chickens can peck, dust-bathe, and forage during the day while staying safe from predators. Attach it directly to the pop door so chickens can move freely between the coop and run. A run needs 8 to 10 square feet per bird, so four chickens need a 32 to 40-square-foot run.

Build the run frame from 2-by-2 lumber and cover it completely with hardware cloth—top, sides, and bottom. Bury the bottom 6 inches into the ground or lay it flat and stake it down. A covered run protects from hawks and rain. If the run is portable (on wheels or light enough to move), you can move it to fresh grass every few days, which reduces parasites and gives chickens new foraging area.

Provide shade in the run with a tarp or shade cloth in summer. Add a waterer and feeder inside the run so chickens can eat and drink without going back to the coop during the day.

Frequently Asked Questions

How much does it cost to build a hen house?

A basic 4-by-4-foot coop for four chickens costs $200 to $400 in materials if you use untreated pine and standard hardware. Larger coops, insulation, automatic doors, and pressure-treated wood increase the cost. A prefabricated coop costs $300 to $1,000 depending on size and quality.

Can I use chicken wire instead of hardware cloth?

No. Chicken wire keeps chickens in but does not keep predators out—raccoons and foxes can tear through it easily. Use hardware cloth (1/2-inch or smaller mesh) for all predator-facing surfaces, especially the floor and buried perimeter.

Do I need to heat the coop in winter?

Most chicken breeds tolerate cold well if the coop is dry and draft-free. Heat lamps are a fire hazard in wooden coops and are not necessary for healthy adult chickens. Focus on ventilation, dry bedding, and insulation instead. Provide extra bedding for nesting and roosting.

How often should I clean the coop?

Remove wet or soiled bedding daily and replace it with fresh bedding. Do a full bedding change weekly or every two weeks depending on how many chickens you have and how much they poop. Nesting boxes should be cleaned out and refilled with fresh bedding weekly.

What size pop door do I need?

A standard pop door is 10 inches wide by 12 inches tall, which fits most chicken breeds. Larger breeds like Brahmas or Wyandottes may need 12 by 14 inches. Measure your largest bird and add 2 inches of clearance on all sides.