How much space do English Orpingtons require?

[EnglishOrps31]

I'm planning to build breeding pens
for my English Orpingtons soon and was wondering what the space requirements are. I wil be keeping them in their breeding pens full time.

 

[Pork Pie]

Broad rule of thumb is 4sqft per bird coop space and 10sqft run space per bird as minimums. The more space, the better.