How should I extend this run?

[newchikngal]

I purchased this coop and being a chicken novice, now know I want to give my 3 birds more room. How would you recommending adding to this run? The slant roof is making things tricky.... I have an open area to the right of the coop so the extended run would need to begin near the lowest point of the roof. If anyone has done this before I'd love to see pics. Thanks.

 

[junebuggena]

That coop is way too small for 3 full grown hens. Generally you need about 4 sq ft of coop space (not including nesting boxes), and 10 sq ft of run space per adult bird.

 

[newchikngal]

Oh man.... I really wish I would've done more research before getting that coop... We just got it... :/

 

[junebuggena]

It's a fine grow-out coop, but you're going to need something with a bit more elbow room for long term. Overcrowding stress is no joke. It can cause all sorts of aggression problems, ranging from mild feather picking (which can develop into a life-long bad habit) to cannibalism.
That little coop would be fine for 3 bantams, but you've got 3 large breed chicks. Those girls are going to get a lot bigger. The average large breed hen will weigh about 5.5 to 6 pounds and has a wing-span of about 3.5 to 4 feet. They can take up a square foot, just standing still. They need room to run around, scratch, dust-bathe, and stretch their wings. All of that requires plenty of room.

 

[newchikngal]

Thanks for your help. We are now completely redoing our plans. We're moving the coop and will be building a covered run that will be approximately 8x4 so give roughly 32 square feet in the run. They're currently about 6-8 weeks old. How long do you think we have to redo the coop? My husband isn't going to be that happy because I have a feeling we're not going to be able to use that coop at all for king and it's a pricey investment for a month or so. I digress... I'm hoping to build the run this weekend so at least they can have roaming space.

 

[junebuggena]

While they are getting to the point where their growth rate is slowing, they will be out growing that coop by about 10 to 12 weeks old. By then, they will be about half-way to their adult size.
You will probably be able to build a simple coop for less than you spent on that prefab one.
There are lots of coop plans and ideas in the coop section. Most of them give really good instructions with measurements and materials lists. All you really have to do is choose one, print it out, and take it to you local hardware store. They'll help you purchase all the materials and even do all the major cuts for you. If you can use a drill, you can build a coop.
https://www.backyardchickens.com/a/small-chicken-coop-designs-pictures-of-chicken-coops