Okay this could be a stupid question, but I am going to ask anyways,

I looked at that coop once...I don't know the answer to your question, but the roosts looked kind of close together. You could always adjust that, I know.

Pretty coop!

 

I think they can just fine, but I'm probably not the best person to answer that question.
Pretty little house, though.

 

That looks really nice, but instead of adding a glass window, why don't you cut small area just like a window and use hardware wire and the piece you cut, you can add hinges and make it like a window/vent. That does look bigger then pawhut coop. Mine only has 2 nest boxes. How much is that coop ?

 

I don't think it's a stupid question at all; I think it's a good question.

I'm certainly no carpentry expert myself, far from it. But my sense would be that if you're handy enough with woodworking tools to retrofit that coop to add a window and proper ventilation, you're probably handy enough to build a better coop than that one from scratch.

I think it's a very risky proposition to buy a coop online without having the ability to actually see what you're buying in person somewhere. There's no good way to assess the quality of the materials and of the construction, or even just to see how easy or hard it might be to retrofit. For example, the coop pictured may or may not be tongue and groove construction in the first place. It looks like it might be, or it just might be boards abutting each other.

 

Build the window frame inside the coop first, just use some 1"x4" and choose the correct size screws so you don't go through the outside wood, fast from the inside. Make sure you attach the window framing to every horizontal siding board, drill holes at the corners of your new window framing from the inside, then cut out the window. By attaching all of the T&G siding boards to a common frame, you'll maintain rigidity. Tie the left and right sides of your window frame to the next T&G board above and below where your window cut out is to be.