Yes, this chicken coop is easily expandable. There are many ways to use this coop to expand your flock. For example, you could add a chicken wire “run” between the two coops by leaving a side open on each coop. It would be easy to attach a permanent 2x4 frame (as long as you want it to be) to 2 of the green roof chicken coops. Another option is to place the chicken coops side by side as shown below: