me and my friends want to buidl a very simple universal coop

Hell

Here in Ontario Canada it gets really cold~! So far we have built a deck that is about 1 feet high and is 12 by 12 by 12 feet

We want to construct a a shed coop on top of that that will be 10 by 10 by 8 feet high

The thing about this shed coop i want it to be universal it will be so humans can walk in and needs to be good for both chickens and pigeons

So it needs to be tall also

I really just want something really simple and nothing fancy that will be good in the winter

none of us have much experience in building but it will require a tiny trap door for the pigeons

We are not sure exactly what species of bird we are going to put in it which is why i want it to be universal because it will save us issues in the future

Any help would be so great! I would love to print it out and show it to my friends thanks so much *hugs*