Designing a chicken house that can accommodate 500 chickens requires careful planning to ensure that the birds are healthy, safe, and productive. Here are some general guidelines and considerations for chicken house plans for 500 chickens:

1. Space requirements: The chicken house should provide enough space for the birds to move around comfortably, with a minimum of 2-3 square feet of floor space per chicken. For 500 chickens, this translates to a minimum of 1,000-1,500 square feet of floor space.
2. Orientation: The chicken house should be oriented in a way that maximizes natural ventilation and sunlight exposure, while minimizing exposure to prevailing winds and direct sunlight.
3. Flooring: The flooring should be smooth, non-slip, and easy to clean and disinfect. Concrete or hard-packed dirt are good options.
4. Nesting boxes: Nesting boxes should be provided to encourage egg-laying and should be placed in a dark and quiet area of the chicken house. One nesting box is needed for every 4-5 hens.
5. Roosting bars: Roosting bars should be provided for the chickens to perch on at night. These should be made of wood and spaced 6-8 inches apart, with a minimum height of 18 inches from the ground.
6. Ventilation: Adequate ventilation is critical to maintaining good air quality in the chicken house and preventing the buildup of harmful gases such as ammonia. The house should have openings for natural ventilation or a mechanical ventilation system.
7. Lighting: Lighting is important for egg production, with a minimum of 14-16 hours of light per day. Artificial lighting can be used to supplement natural light.
8. Water and feed systems: The chicken house should have a reliable source of clean water and a feeder system that is easy to access and refill.
9. Biosecurity measures: To prevent the spread of diseases, the chicken house should be designed with biosecurity measures such as foot baths, hand washing stations, and separate areas for quarantining sick birds.
10. Local regulations: Be sure to check local regulations and zoning requirements before designing and building a chicken house.

These are some general considerations when designing a chicken house for 500 chickens. You can consult with a poultry expert or an architect to create a more detailed plan that meets your specific needs and budget.