20×20 Walk-in Chicken Run Plans With Nesting Boxes

Our comprehensive DIY chicken coop plans provide step-by-step instructions for building a spacious and secure 20×20 walk-in coop, complete with a well-designed enclosed run and a comfortable hutch area. With a massive 400 square foot enclosure, this coop is perfect for housing a large flock of up to 80-100 birds while promoting excellent health and welfare.

The plans detail how to construct a sturdy timber frame with a classic “pavilion” or “small barn” aesthetic, featuring a premium metal gable roof for excellent, long-lasting protection from the elements. The high central peak creates an airy, spacious interior feeling, while the inclusion of a solid lower wall on one side provides a thoughtful windbreak for your flock.

Inside, the coop is well-equipped for a large flock, with appropriately scaled roosting structures and a large bank of nesting boxes designed for easy egg collection without disturbing your hens. The plans also include specific instructions for integrating practical features like designated areas for feeders and waterers, minimizing mess and reducing daily maintenance time.

To ensure the safety and security of your flock, our plans provide detailed guidance on properly enclosing the run with heavy-gauge welded wire mesh, as well as connecting the run to a suitably large, insulated, and draft-free henhouse for year-round use in any climate. The plans also cover the importance of constructing a robust, level foundation to ensure the long-term stability and integrity of this sizeable structure.