How big does my coop need to be?

[Sisters chickens]

So I don’t have chickens yet but I would like to have around 10-15 Plymouth Rocks to start with but I don’t know how big the coop needs to be. I want to sell all the eggs. Any suggestions please

 

[SueT]

It is rule of thumb to have at least 4 sq ft per chicken inside coop, and 10 sq ft of run.

 

[ChickNanny13]

2x Just remember BIGGER the BETTER ... More room less flock squabbles & allows for Chicken Math

 

[cmom]

I don't worry so much about the coop size as much as their run/pen size. My birds are out of the coops and in their pens most of the day and only go in to eat, because the feeders are in the coops, lay eggs in the nest boxes and to roost at night so my thoughts are, which many people won't agree with, is as long as you have enough roost space. There are many different types of roosts.