
Building a chicken coop in an old barn is a great way to repurpose the structure and provide shelter for chickens. It can be a simple DIY project, but there are some key considerations to keep in mind. First, ensure the barn is sealed to protect the chickens from predators. Next, decide on the flooring—dirt, concrete, or another material—and prepare it accordingly. You may also want to add windows for natural light and ventilation, especially in warmer months. Using recycled or repurposed materials can add character and save costs. Finally, consider adding nesting boxes, perches, and a secure door to create a comfortable and functional space for your chickens.
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What You'll Learn

Building a coop in a barn stall
Building a chicken coop in a barn stall is a great way to repurpose an old barn and provide a safe space for your chickens. Here's a step-by-step guide to building a coop in a barn stall:
Planning and Preparation:
Before you begin construction, it's important to assess the condition of your barn and plan the layout of your coop. Ensure the barn is structurally sound and take care of any necessary repairs, such as fixing leaky roofs or rotten areas. Decide on the size and location of your coop within the barn stall, considering factors such as ventilation, storage, and access to natural light.
Cleaning and Sanitation:
Thoroughly clean and sanitise the chosen stall to create a healthy environment for your chickens. Muck out any old debris, dirt, or animal waste, and treat the floor with a disinfectant like activated Oxine, ensuring it dries completely. This step is crucial to prevent bacteria, viruses, and pests like rodents.
Constructing the Coop:
If your barn doesn't have a concrete floor, consider installing a solid foundation to predator-proof your coop. Dig a trench for concrete blocks, leaving 1-2 inches exposed above ground level. Build walls and a roof for the coop, using plywood for enclosure and insulation, especially if the barn doors are missing or open. Consider repurposing old wood, doors, or fencing to save costs and create a unique look.
Ventilation and Lighting:
Barns can get warm during summer, so ensure your coop has adequate ventilation. Leave some space between the top of the coop and the roof trusses to allow for cross-ventilation when the barn doors are open. Install windows on opposite sides of the coop to maximise natural light, benefiting both your chickens and any plants inside the barn.
Flooring and Nesting:
Decide on the type of flooring for your coop. While dirt floors are an option, they may attract rodents and predators. Consider throwing down fresh dirt, straw, or wood shavings, or installing a concrete floor. Create nesting boxes for your chickens using simple plastic storage tubs filled with bedding, placed near the entryway and inside the roosting area.
Final Touches:
Add any necessary locks or latches to the coop door for security. Install an automatic opening and closing mechanism if desired, especially if you're often away during dusk. Ensure the coop is well-lit, and consider using an automatic timer for the lights if needed.
By following these steps, you can create a comfortable and safe chicken coop within your barn stall, providing your chickens with a happy home.
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Preparing the floor
Firstly, assess the existing floor of the barn. If it is a dirt floor, you will need to muck out any old debris, such as cow or horse dung, and treat the floor with a disinfectant like activated Oxine to eliminate bacteria and viruses. This step will ensure your chickens have a clean and safe environment. Ensure the disinfectant dries out thoroughly before proceeding.
If you prefer a concrete floor, you will need to install a solid foundation to build upon. Dig a trench along the perimeter of your planned chicken coop, deep enough for your concrete blocks to sit with 1-2 inches exposed above ground level. This step will help prevent rodents from digging their way into the coop. Alternatively, you can use gravel in some areas for added protection against rodents.
If you opt for a dirt floor, consider adding a layer of fresh dirt or soil before spreading straw, shavings, or wood chips to create a comfortable and natural environment for your chickens. Wood chips are an excellent option for chicken coops as they provide a pleasant scratching and dust-bathing area for the chickens, help control odours, and deter flies. Ensure the bedding material is at least 3-4 inches deep and periodically add more as it breaks down.
For added protection, consider lining the perimeter of your coop with broken concrete or large rocks, and use chicken wire or hardware cloth to dissuade digging by predators. A French drain behind the barn is also recommended to prevent water from collecting under the coop and creating a muddy mess.
Lastly, ensure the floor is level. An uneven floor can create uncomfortable living conditions for your chickens and make cleaning more challenging. By following these steps, you will have a safe, comfortable, and functional floor for your chicken coop in your old barn.
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Ventilation and temperature control
When building a chicken coop in an old barn, ventilation and temperature control are important considerations for the health and comfort of your chickens. Here are some detailed instructions and tips to help you with this project:
Firstly, assess the existing ventilation in the barn. Most barns have large doors that can be opened up to provide cross-ventilation, which is crucial for keeping the coop comfortable during hot summer months as barns can quickly become warm. If your barn has built-in ventilation in the roof, ensure that it is clear of any obstructions and consider adding additional ventilation if needed.
Next, consider the placement of the coop within the barn. Leaving some space between the top of the coop and the roof trusses allows for air circulation and provides extra storage room. Ensure that the ceiling of the coop is sturdy enough to support weight and line it with plywood to seal it off from predators. This dual-purpose design provides practical benefits and efficient use of space.
Additionally, pay attention to the flooring of the coop. A concrete foundation is ideal for predator-proofing, as rodents may dig underneath. If a concrete floor is not an option, consider using gravel, deep litter, or wood chips on the ground to a depth of 3-4 inches. This provides a comfortable scratching and dust-bathing area for chickens and helps control odours and flies.
Temperature control is also essential for chicken health. In hot climates, pairing shaded areas with hanging fans can help keep chickens comfortable. Ensure that the chosen space within the barn is well-ventilated and does not receive direct sunlight for extended periods. Conversely, in colder months, insulation may be necessary to retain heat within the coop.
Lastly, consider adding windows to the coop to increase natural light. This not only provides illumination for your chickens but also helps regulate temperature by allowing warm air to escape during hotter periods. Remember to secure windows with chicken wire or similar materials to prevent unwanted visitors from entering.
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Using recycled materials
Building a chicken coop in an old barn using recycled materials is a cost-effective and environmentally friendly way to provide shelter for your chickens. Here are some tips and ideas to get you started:
First, take inventory of the recycled materials you already have on hand. Do you have any old barns, sheds, or other structures that could be a source of lumber? Reclaimed wood, pallets, and scrap wood can all be used to build the frame, walls, and floor of your chicken coop. Even things like old doors, roofing materials, and hardware can be reused or repurposed.
If you're short on recycled materials, don't be afraid to get creative and think outside the box. Visit local construction sites or lumber stores and ask if they have any scrap lumber, cut-offs, or imperfect wood that they're planning to discard. You can also keep an eye out for discarded items like black safety nets for trampolines, which can be used for fencing or enclosures. Remember to avoid using lumber that has been treated with lead paint or chemicals.
When designing your chicken coop, it's important to consider the basic needs of your chickens. A coop should be structurally sound and include nesting boxes, roosting bars, space for feeders and waterers, and vents for air circulation. You can use recycled wood or scrap materials to build these features into your coop. For example, you can create nesting boxes out of old dresser drawers reinforced with wooden boards.
In addition to using recycled materials for the structure of the coop, you can also repurpose items for other chicken needs. For example, you can use branches instead of boards for roosts, hang feeders with bungee cords, and create a predator-proof door using a wooden screen door frame.
By combining recycled materials, creativity, and a bit of elbow grease, you can build a functional and unique chicken coop in your old barn while reducing your carbon footprint and keeping materials out of landfills.
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Building a roost
Firstly, decide on the type of material you want to use. Wood is the ideal material for a chicken roost, as metal gets too cold and plastic is difficult for chickens to manoeuvre on. If you want to use wood, ensure it is splinter-free to reduce the chances of infections, and ease any sharp edges with a router, planer, or sandpaper. You can use scrap wood, old pieces of furniture, or pallets. If you want to use branches, select smooth tree branches without sharp corners or protruding knots.
Next, you need to decide on the design of your roost. The most common design is the ladder-style roost, which has two side rails with rungs in between for the chickens to sit on. This type of roost simply leans against the wall of the coop and does not need to be secured. Alternatively, you can build a freestanding roost by adding legs to each corner or building an A-frame. As a rule of thumb, one average-sized chicken will require about 12” of roosting bar space, so plan your roost accordingly.
Once you have your materials and design, it's time to start building. If you're using branches, prepare the two larger branches that will serve as the side rails. Cut about four feet of rope for each side of each rung, and secure the rungs to the side rails by wrapping the rope around the branches and tying tightly with square knots. You can also use screws and a power drill to secure the rungs, but this requires more skill and tools.
Finally, place your completed roost in the coop and lean it against the wall. You may need to encourage your chickens to use the new roost by moving them to it by hand after dusk for a few nights. It can take a while for chickens to break old roosting habits, but they will eventually adjust to the new accommodations.
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Frequently asked questions
Building a chicken coop inside a barn is like having an extra layer of protection from predators. Most barns are already equipped with a water supply and an electrical supply, and you can easily add a place to store food.
You’ll need to install a solid foundation to build on. Dig a trench in line with your walls deep enough for your concrete blocks to sit, leaving 1-2” of the block exposed above ground level.
Muck the stall out well, and then use a product such as activated Oxine to thoroughly treat the dirt floor to get rid of any lingering bacteria and viruses. The cons of a dirt floor are rodents digging up through and potential predators.
Repurposed materials are great for building a chicken coop. You can use old wood, an old door, or even a ladder-shaped object for the chickens to roost on.
You'll need to think about ventilation, especially in the summer months when barns can get warm. You may want to leave a couple of feet between the top of the coop and the roof trusses to allow for storage.










































