TexasSam
Free Ranging
This isn't badhttps://www.backyardchickens.com/articles/countryroosterusas-first-chicken-coop.47828/
I like this one. I would change a couple things but the basic design is sound.
Building your own will do 3 things.
Save money.
Incorporate your needs for ventilation.
Last many many years as opposed to the online kits average of half a season.