what coop size do i need for my chickens

When embarking on the rewarding journey of keeping chickens, one of the most crucial decisions you’ll make is determining the appropriate size for their coop. The question, “What coop size do I need for my chickens?” is not just about ensuring that your feathered friends have a roof over their heads.

It’s about providing them with a habitat that ensures their safety, comfort, and health. A properly sized coop is fundamental to their well-being and your success as a chicken keeper.

Whether you’re planning a small backyard flock or a larger, free-ranging brood, understanding the space requirements for your chickens is key to creating an optimal living environment for them. Let’s begin

 Chicken Coop Size Guidelines

Number of Chickens Minimum Outside Space per Chicken (Sq Ft) Total Minimum Outside Space (Sq Ft)
1 8-10 8-10
2 8-10 16-20
3 8-10 24-30
4 8-10 32-40
5 8-10 40-50
6 8-10 48-60
7 8-10 56-70
8 8-10 64-80
9 8-10 72-90
10 8-10 80-100



  • These are minimum space requirements. Providing more space is always better for the health and welfare of the chickens.
  • For flocks larger than 10, continue to add 8-10 square feet per additional chicken.
  • The space requirements can vary based on breed and the type of environment you want to provide. Some breeds, especially larger ones, may require more space.
  • Ensure that the outdoor space is secure from predators and provides shelter from the elements.

chicken coop size for 20 chickens

Examples of Chicken Coop Sizes and Capacity 

When considering chicken coop sizes, it’s essential to ensure enough space for each chicken to live comfortably and healthily. Here are some examples of chicken coop sizes and their respective capacities. Keep in mind these are general guidelines, and the actual size can vary based on breed and the amount of time chickens spend inside the coop:

Small Coop

  • Dimensions: 4′ x 4′ (16 sq ft)
  • Capacity: 3-4 chickens
  • Ideal for: Backyard flocks, urban settings
  • Notes: Suitable for smaller breeds or bantams.

Medium Coop

  • Dimensions: 8′ x 6′ (48 sq ft)
  • Capacity: 8-12 chickens
  • Ideal for: Moderate backyard flocks
  • Notes: Offers more space for nesting boxes and roosting bars.

Large Coop

  • Dimensions: 10′ x 10′ (100 sq ft)
  • Capacity: 15-20 chickens
  • Ideal for: Larger flocks, rural areas
  • Notes: Ample space for multiple feeding and water stations.

Extra-Large Coop

  • Dimensions: 12′ x 12′ (144 sq ft)
  • Capacity: 20-25 chickens
  • Ideal for: Extensive flocks, farming purposes
  • Notes: Ideal for breeds requiring more space, allows for efficient movement inside the coop.

Custom Coop

  • Dimensions: Variable, often larger than 12′ x 12′
  • Capacity: 25+ chickens
  • Ideal for: Large scale poultry keeping, specific needs
  • Notes: Customized to include specific features like larger nesting areas, more roosting space, and enhanced security features.

Pro Tip

  • The coop should have adequate ventilation, nesting boxes (typically one box per 3-4 hens), and roosting bars.
  • Space for food and water should be easily accessible.
  • The coop must be predator-proof and have provisions for easy cleaning and maintenance.
  • Providing an outdoor run or allowing free-ranging can significantly improve the quality of life for the chickens.


  • 3-4 Chickens: A coop of about 6×6 feet with an attached run of at least 8×8 feet.
  • 5-6 Chickens: A coop of 8×6 feet with an attached run of at least 10×8 feet.
  • 10 Chickens: A coop of 10×10 feet with a run of at least 10×20 feet.

The needs can vary based on the specific breed and individual chickens’ behavior. If space allows, providing more than the minimum recommended space can contribute to healthier, happier chickens. Also, consider future expansion in case you decide to add more chickens to your flock.

What Size Chicken Coop I Need?

The size of the chicken coop you need depends on several factors, including the number of chickens you plan to keep, their breed, and whether they’ll have additional outdoor space. Here are some general guidelines to determine the right size for your chicken coop:

chicken coop size for 4 chickens

Space per Chicken Inside the Coop

The interior space of the coop is crucial for the well-being of your chickens. Each chicken requires about 2-3 square feet of space inside the coop if they will have access to an outdoor run. 

This space is necessary to prevent overcrowding, which can lead to health issues and aggressive behaviors. If the chickens are going to be confined to the coop full-time, without access to an outdoor run, they’ll need at least 10 square feet each. 

This extra space helps to compensate for the lack of outdoor activity and ensures that the chickens have enough room to move around, stretch, and engage in natural behaviors.

 Outdoor Run

Providing an outdoor run for your chickens greatly improves their quality of life. In the run, each chicken should have 8-10 square feet of space.

 This outdoor area allows the chickens to exercise, forage, take dust baths, and receive sunlight, all of which are essential for their physical and mental health. The run should be secure to protect the chickens from predators and should provide shelter from the elements.

Nesting Boxes

Nesting boxes are where your hens will lay their eggs. Generally, you need one nesting box for every 3-4 hens. The boxes should be about 12×12 inches to accommodate the hen comfortably. 

They should be placed in a quiet, darker part of the coop to provide a sense of security and privacy, which encourages egg-laying.

 Roosting Bars

Chickens naturally seek high places to sleep at night, away from potential threats. Roosting bars satisfy this instinct. Each chicken needs about 8-10 inches of roosting bar space

The bars should be positioned higher than the nesting boxes to prevent the chickens from sleeping in the boxes, which can lead to soiled eggs. If you have multiple bars, they should be staggered at different heights to accommodate the pecking order within the flock.

Ventilation and Windows

Proper ventilation is critical in a chicken coop to keep the air fresh and to reduce moisture and ammonia levels. Good airflow helps prevent respiratory issues in chickens and keeps the coop environment healthy.

Chicken coop size for 2 chickens

 Windows not only provide ventilation but also natural light, which is beneficial for the chickens’ circadian rhythms and egg production.


The coop should be designed for easy maintenance. This includes accessibility for cleaning, feeding, and egg collection. A coop that is easy to maintain ensures a clean and healthy environment for the chickens and simplifies the caretaking process.

By carefully considering these factors, you can create a living space that meets all the needs of your chickens, leading to a happy, productive flock. Remember, these are guidelines, and the specific needs can vary based on the breed and individual behaviors of your chickens.

Chicken Coop Size Calculator

Creating a simple Chicken Coop Size Calculator involves a few straightforward calculations based on the number of chickens you have or plan to have. Here’s how you can calculate the required coop size:

  • Interior Space in the Coop:
    • If chickens have access to an outdoor run: 2-3 square feet per chicken.
    • If chickens are fully confined: 10 square feet per chicken.
  • Outdoor Run Space (if applicable):
    • 8-10 square feet per chicken.

Chicken Coop Size Calculation

  • Number of Chickens: [Your number of chickens]
  • Will they have access to an outdoor run? [Yes/No]

If Yes:

  • Interior Space Needed: Number of Chickens × 3 sq ft
  • Outdoor Run Space Needed: Number of Chickens × 10 sq ft

If No:

  • Interior Space Needed: Number of Chickens × 10 sq ft

Example Calculation:

  • Number of Chickens: 5
  • Access to Outdoor Run: Yes


  • Interior Space Needed: 5 chickens × 3 sq ft/chicken = 15 sq ft
  • Outdoor Run Space Needed: 5 chickens × 10 sq ft/chicken = 50 sq ft

So, for 5 chickens with access to an outdoor run, you would need a coop with at least 15 square feet of interior space and a 50 square feet outdoor run.

Coop Size for 10 Chickens

For a flock of 10 chickens with access to an outdoor run, a coop of about 30 square feet (2-3 square feet per chicken) is recommended. This allows enough space for the chickens to move around comfortably without overcrowding. 

If they will not have access to an outdoor run, you should aim for at least 100 square feet (10 square feet per chicken) to ensure they have ample space for healthy living. Additionally, ensure adequate space for nesting boxes and roosting bars.

Coop Size for 8 Chickens

For 8 chickens, a coop with around 24 square feet of interior space (assuming 2-3 square feet per chicken) is ideal if they have access to an outdoor run. This size ensures each chicken has enough room to live comfortably and engage in natural behaviors. 

If they are fully confined, aim for a coop size of 80 square feet (10 square feet per chicken). This larger space is crucial to maintain healthy conditions and reduce stress among the chickens.

Coop Size for 4 Chickens

A small flock of 4 chickens requires a coop of about 12 square feet (2-3 square feet per chicken) if they have access to an outdoor run. This size provides enough space for them to roost and move around comfortably. 

For chickens that are completely confined to their coop, a space of 40 square feet (10 square feet per chicken) is recommended to ensure they have enough room to exhibit natural behaviors and maintain good health.

Coop Size for 12 Chickens

For a slightly larger flock of 12 chickens, you should consider a coop of approximately 36 square feet (2-3 square feet per chicken) if they have access to an outdoor run. This size allows for sufficient space to accommodate all the chickens comfortably.

 In the absence of an outdoor run, a coop size of 120 square feet (10 square feet per chicken) is advisable to prevent overcrowding and to promote a healthy living environment. Remember to include space for essential features like nesting boxes and roosting areas.


Choosing the right size coop for your chickens is a balance between available space, the number of chickens, and their lifestyle (whether they have access to an outdoor run or not). Ensuring each chicken has enough space is vital for their health, happiness, and productivity. A coop that’s too small can lead to stress, disease, and behavioral problems, while a coop that’s too large may be challenging to keep warm and clean. Remember, the coop is not just a shelter; it’s a home for your chickens, where they feel secure and comfortable. By following these guidelines, you can create a thriving environment for your feathered friends, ensuring they are healthy, happy, and productive.


What is a good size chicken coop?

A good size chicken coop typically offers 2-3 square feet per chicken inside the coop if they have access to an outdoor run, and at least 10 square feet per chicken if they don’t.

What size plan for chicken coop?

Plan a chicken coop size based on the number of chickens you intend to keep. Aim for at least 2-3 square feet of interior space per chicken, plus an outdoor run.

How many chickens can fit in a 12×12 coop?

In a 12×12 coop, you can comfortably fit 24-36 chickens if they have access to an outdoor run, and about 14-15 chickens if they are fully confined.

How many chickens can fit in a 4×8 coop?

In a 4×8 coop, you can fit about 8-12 chickens with access to an outdoor run, and around 4-5 chickens if they are fully confined.

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