Clean out drain in garage against code?

[James Wilcox]

Was looking at a place that has had a garage built into the home. It appears the sewer clean out that is normally located outside the home is in the middle of the floor in the garage. The garage is a concrete slab. Is building a sewer clean out in your garage against code or illegal? Also there should be a permit for the garage correct? What are the issues if there is no permit and the trap is not up to code?

Maybe a contractor will know the answer to this.