I'm not that far from you geographically (Washoe County NV). I have 6 Rhode Island red hens in an A-frame. The whole thing sits on a raised bed planter that is made from 2 x 12's. The bottom of the frame is 4 x 8 and the peak of the A is about 5 feet tall. The coop is on top of the run underneath. The run is about 2 feet tall. That leaves about 3 feet in the upper A-frame part of the coop. And the floor up there is about 2 x 8. Honestly, in the winter I wish I had a few more big birds. They can't keep the temps up in the coop on cold nights and they are way spread out instead of being inclined (or forced due to space) to huddle.
I let the girls out to free range if the weather is nice and someone is home. And there has never been a day when they were totally confined to the upper coop.
But honestly, I think I could easily put 10 birds in there and they would be happy as long as they could get out a bit and the roosts are strategically spaced. This spring I'm looking at getting rid of the indoor feeders and water bucket in the coop Instead I am going to build a system to fill from the outside from PVC so that just a small pipe sticks into the coop, talking up less floor space. During the winter I will still have to revert to a heated dog water bowl. The idea for the outside feeder and waterer is here on the forum if you do a search.
Good luck!
Here's some pictures...
I let the girls out to free range if the weather is nice and someone is home. And there has never been a day when they were totally confined to the upper coop.
But honestly, I think I could easily put 10 birds in there and they would be happy as long as they could get out a bit and the roosts are strategically spaced. This spring I'm looking at getting rid of the indoor feeders and water bucket in the coop Instead I am going to build a system to fill from the outside from PVC so that just a small pipe sticks into the coop, talking up less floor space. During the winter I will still have to revert to a heated dog water bowl. The idea for the outside feeder and waterer is here on the forum if you do a search.
Good luck!
Here's some pictures...

