Yep, they're breaking the law. I think it's just enforced on a complaint basis though. Our place is unplatted, so no subdivision rules, just the city code. Problem is all the places around us are worth scary high amounts of money. We live in an underground house in an area full of mcmansions.It seems that you have 5 acres that the codes would have some variances than a city lot. Do you live in a addition or rural area.
There sure are a lot peeps out there that are breaking the law on the outer edges of the OKC city limits if that is the law.