A small chicken pen is a portable or fixed enclosure that holds three to six birds and takes one to two days to build with basic tools

A chicken pen (also called a run or coop) needs four things: a frame, wire mesh to keep predators out, a roof or cover for weather, and a door you can open and close. The smallest working pen is about 4 feet by 8 feet for three to four chickens, though six birds fit more comfortably in a 4-by-10 space. You can build one from lumber scraps, hardware cloth, and hinges using only a saw, drill, and staple gun—no welding or special skills required.

The pen sits on the ground or on short legs. Ground-level pens need to be moved every few weeks so chickens don't strip the grass and disease doesn't build up in the soil. Pens on legs (called tractors) are lighter and can be dragged by one person, but they take longer to build and cost more. This guide covers a fixed ground pen, which is the fastest and cheapest option for a beginner.

Key Takeaways

  • A basic pen frame is four walls made from 2-by-2 lumber, joined at the corners with bolts or lag screws so you can take it apart later.
  • Hardware cloth (not chicken wire) stops predators—chicken wire keeps birds in but lets raccoons and foxes tear through it.
  • The roof can be a straightforward A-frame covered with corrugated plastic or tarps, or a flat roof made from the same materials as the walls.
  • A hinged door on one end lets you reach inside to collect eggs and clean, and should be large enough for your arm and a bucket.
  • The whole project costs between $150 and $300 depending on whether you use new lumber or scrap, and takes 8 to 12 hours of work.

Gather your materials before you start

For a 4-by-8 pen with an A-frame roof, you need eight pieces of 2-by-2 lumber, each 8 feet long (four for the long sides, four for the short sides). You also need four pieces 4 feet long for the roof frame. If you are building a flat roof instead, add four more 8-foot pieces. Buy pressure-treated lumber so it lasts five to seven years outdoors.

For the mesh, buy a roll of hardware cloth in 1/2-inch or 1/4-inch gauge—the smaller the holes, the better it stops weasels and rats. A 4-by-8 pen needs about 50 linear feet of 3-foot-wide cloth, which costs $40 to $60. For the roof, buy either corrugated plastic panels (cheaper, lasts three to four years) or heavy tarps (lasts longer but needs replacing every two years). You will also need 1-inch bolts with washers and nuts (eight total), a hinged door frame or a piece of plywood for the door, and a gallon of wood stain or sealant to protect the lumber.

Tools you need: a circular saw or hand saw, a drill with bits, a 1-inch socket or wrench, a staple gun with 3/8-inch staples, a level, and a tape measure. If you do not own a staple gun, borrow one or rent one from a hardware store for $5 to $10 a day.

Build the frame in the location where the pen will sit

Lay out the four long 2-by-2 pieces in a rectangle on the ground where you want the pen. The two 8-foot pieces form the long sides, and the two 4-foot pieces form the short sides. Drill a hole through each corner joint (where two pieces meet), 2 inches from the end of each board. Insert a 1-inch bolt through the hole, add a washer and nut on the other side, and tighten with a wrench. Do not over-tighten—snug is enough. This frame is your base.

Stand up the four vertical pieces (the other four 8-foot 2-by-2s) at each corner of the base frame. They should stand straight up—use a level to check. Drill through the base frame into the bottom of each vertical piece and bolt them the same way. Now you have four walls standing. Brace the corners with diagonal pieces if the frame feels wobbly, or wait until you add the roof—the roof will stiffen it.

If you are building a flat roof, bolt the four remaining 8-foot pieces across the top of the vertical pieces, one on each long side and one on each short side. If you are building an A-frame roof, bolt two of the 4-foot roof pieces to the tops of the short sides, angling them up to meet in the middle. This creates the peak. The frame is now complete.

Attach hardware cloth to all sides and the roof

Unroll the hardware cloth and start at one corner of the frame. Pull it tight and staple it to the wood every 4 to 6 inches using the staple gun. Work your way around all four sides, pulling the cloth tight as you go so it does not sag. Overlap the cloth at the corners by 6 inches and staple both layers. Trim any excess cloth with tin snips or a utility knife.

Staple cloth to the roof the same way. If you are using an A-frame, start at the peak and work down both sides. If you are using a flat roof, cover the entire top. Leave the door opening uncovered—you will add the door frame next. Wear gloves while handling hardware cloth; the cut edges are sharp and will cut your hands.

Check for gaps where the cloth meets the frame. Any opening larger than 1/4 inch is an entry point for rats and weasels. Fold the cloth back on itself and staple it again if you see gaps, or patch them with a piece of cloth stapled over the hole.

Cut and hang the door

The door should be at least 12 inches wide and 18 inches tall so you can reach inside with a bucket and your arm. Cut a rectangle out of one short side of the pen using a saw. You can cut through the wood frame and cloth together. Save the piece of cloth you cut out—you will use it later.

Build a straightforward door frame from 2-by-2 lumber: four pieces forming a rectangle the same size as the opening. Attach the cloth you saved to this frame using staples. Hinge the frame to the pen using two hinges bolted or screwed to the top edge of the opening. Add a hook-and-eye latch at the bottom so the door stays closed. Test the door—it should swing open and closed smoothly and close tightly with no gaps.

Cover the roof with plastic or tarps

If you are using corrugated plastic panels, cut them to size with a circular saw and screw them to the roof frame using roofing screws (which have rubber washers that seal the holes). Overlap the panels by one ridge so water runs off and does not leak between them. If you are using tarps, stretch them tight over the roof and tie them down with rope or bungee cords at the corners and edges. Leave a small gap at the peak or one end so air can flow through—a pen with no ventilation gets hot and humid, which stresses the birds.

The roof should overhang the sides by at least 6 inches so rain does not run down the walls and soak the ground inside. If your roof does not overhang, add a gutter or a strip of plastic along the edge to direct water away.

Seal the wood and add finishing touches

Paint or stain all the wood with an outdoor sealant to slow rot. You do not need to seal the inside, only the outside and the top edges of the frame where water collects. Let the sealant dry for 24 hours before you put birds inside.

Add a small ramp or step at the door so chickens can hop in and out easily. A piece of 2-by-4 lumber with cleats nailed to it works well. You can also add a perch inside (a 2-by-2 bolted horizontally) so birds have a place to roost at night, though this is optional for a daytime pen.

Move the pen to a spot with morning sun and afternoon shade. Chickens need shade in summer and sun in winter to stay comfortable. If the ground is wet or muddy, add a layer of straw or wood shavings inside to keep the birds dry.

Frequently Asked Questions

Can I use chicken wire instead of hardware cloth?

Chicken wire keeps birds in but does not stop predators. Raccoons, foxes, and weasels tear through it easily. Hardware cloth is stronger and worth the extra cost—it is the difference between losing birds and keeping them safe.

How often do I need to move the pen?

Move it every two to four weeks, depending on how many birds are inside and how much grass is available. If the ground inside looks bare or muddy, it is time to move. Moving prevents disease buildup and gives the grass time to recover.

What if I want to make the pen portable?

Use bolts instead of nails or screws everywhere so you can take it apart. Build it lighter by using 1-by-2 lumber instead of 2-by-2, and add handles on two sides so you can drag it. A portable pen takes longer to build but is easier to move and clean.

Do I need a floor inside the pen?

No. A dirt or grass floor is fine and lets birds scratch and peck naturally. If predators dig underneath, bury the hardware cloth 6 inches into the ground around the perimeter, or lay it flat on the ground under the pen before you build.

How much does a small pen cost to build?

A basic 4-by-8 pen costs $150 to $250 if you buy new lumber, or $80 to $150 if you use scrap wood. The hardware cloth and roof covering are the biggest expenses. A portable pen costs more because it needs lighter materials and handles.