Step 1: grab a cute li'l helper and start on the porch. Here's the frame & the floor.
Step 2: Select your location. Pay special attention---it matters!
Step 4: Add siding & rafters
Step 5: Take a break and wonder why you aren't building an art studio for all this effort.
Step 6: Paint, build exterior nestboxes and doors
Step 7: Enlist husband to shingle the roof. Do not attempt to tickle his leg while he's up on the ladder--he won't think it's funny.
still not funny...
Step 8: Add trim & shutters. Frankly, the chickens won't care but you'll get points from the neighbors
Step 9: Add hardware cloth, chicken door & ramp. Watch the pitch on the ramp--you want the chooks to elegantly saunter out of their house not tumble together in a feathery pile.
Step 10: Paint rooster to watch over the hens. Only 2-D rooster allowed (see step 8 about keeping neighbors happy)
Step 11: Install chickens and let the happiness begin!
We loosely used the "All in One" pattern in the book Building Chicken Coops for Dummies.