A run 4m by 4m is plenty, but the size curious chickee suggested will make all of them very happy, and will help give the older girls places to go sulk when (not if- chicken math is contagious enough to spread through the internet! Beware of Easter!) you get baby chicks, and are integrating...
Well, 3m =9ft and 9x9=81, and 81devided by 4 is 20.25, so you can have twenty and a fourth a chicken! No, I'm just kidding. If all the floorspace is available, you can probably fit 20-24 chickens in there, easily. Just remember to give them plenty of roosting space, about 8-12 inches per bird...
The concrete slab will help cool down the chicken's feet, so you could make bedding in the summer thinner. Are there any trees around the shed to provide shade? Does the shed have open able windows, or do you have the tools to cut some holes into the shed so you can install ones you find/get for...
Well, yes, if it is secure and predators can't get to them. (Which means you need hardware cloth across these 'gaps' in the coop.) Here is a thread about hot weather coops: https://www.backyardchickens.com/t/163417/please-show-me-your-hot-weather-coops
The problem with these is that they are...
The coop (or hen house) is where they sleep. They do not have access to the outdoors if the pop door is closed. The run is like a fenced in yard- its where they play all day, eat, dust bathe, etc.
A meter is a little over 3ft., so about a square meter per bird, for you. A coop for six hens should have 22-24 sq.ft. (7.3 - 8sq.m.) of space for them to walk around in, with no nesting boxes or feeders in the way. The coop should, then, be 4'x 6', (1.3x 2m) or 3'x 8' (1 x 2.6m). Each...