NOPE.
That's three seperate things shoved together as one. Not as good as one thing designed to work as a complete system. You want and need overhangs on the hen house - its where you will hide predator-protected, weather-sheltered 24/7/365 free ventilation, so you aren't dependent on windows (and because its nice when you are opening the door to be out of the rain). The ridge line of the roof and the attached run should be continuous. Trust me, when you build this thing, you aren't moving it later.
Unsure if you've given thought to your flooring, but with chickens, there's a lot of very good reason to use bare earth and "deep litter" - meaning no floor. No floor means your design can go up more like a pole barn - its a different building method. You may also want to give thought to externally accessible nesting boxes, for your convenience. But the height of those affects the height of your roosting bars. So its not a decision made lightly, or later.
Additionally, its a a hen house, not a people house. Windows you can't rely on are needed only for satisfying human sense of aesthetics and to provide ambient light. You can cut some costs there, if you aren't interested in the aesthetics with a more functional, top open window higher up on the walls. Likely south facing, for passive solar. Its also framed more heavily than need be, increasing construction costs. No need for 16" oc, 24" oc is perfectly adequate.
There are doors on both sides? That will tend to limit how you can use the internal space - your roosting bars, for instance, will need to run from door wall to door wall. Which is fine, but with double doors as pictured, your mounting space is limited. Go to a single door at each side, instead. Or locate the doors close to a single corner, so the rest of the space is useful for roosts, shelving, etc w/o impeding your traffic thru the room.
Finally, have you given thought to which way you are going to orient this thing?
Those are my initial thoughts, based ona quick glance.
