Roost for new coop

I’m currently building a coop for the first time. I’m a complete novice with this but we’re excited to start caring for chickens.

I’m concerned if this is enough roost space for 4 maybe 5 chickens. It’s 24 inches off the coop floor. The coop is 6 ft tall in front and 5 in the back and is 4 x 4 interior.

I guess my question is, is this enough room? Could I maybe put a second one higher?

Any advice is much appreciated