Here's my chicken coop I made for my 9 free range 'black rock' hens and cockerel.
In fairness I spent quite a while planning the design and its worked out really well and there is nothing I would change.
Removable side panel; Allows easy and full access inside of coop.
Really easy to clean; Being an ideal height with no bending.
Removable internal perch rack; Lifts out to clean and remove bedding.
Removable floor; Simply lifts out for cleaning.
Top and side ventilation; Providing ample ventilation throughout the coop
Moveable around the garden; Liftable using the 'slide in / out handles.
Easy access nest boxes; Easy to clean and access, no bending.
Space under coop; Proves ample shelter for hens in bad weather and dust bath area.
Removable ladder; Fastened on 'hook and eye' fixing makes it adjustable to different ground gradients.
Houses; Would comfortably house 12 free ranging hens.
Design; Helps it sympathetically blend into the surrounding landscape.
Externally treated with clear timber preservative before being painted with three coats of Cuprinol 'shades' coloured timber preserver.
Internally treated with clear timber preservative before being painted with two coats of white external matt paint, reflecting additional light into the house.
Once installed in position I added a battery operated 'dawn till dusk' automatic door opener.
It took me about a week to make and a further few days to paint.
Total cost of materials was approximately £250 with an additional £95 for the automatic door opener.