East Los Angeles is unincorporated, so permits here come from LA County Public Works, not a city hall. The county's list of work that generally needs a permit names new buildings, additions, patios, remodels and grading, and it doesn't name concrete floors. If your floor is part of an addition or remodel, that's on the list. Either way, we check with the county for your address before we set a date, and when a permit is needed, we take care of it.
The county only issues a permit to a properly licensed contractor, to the owner in certain cases, or to an agent of either one. Work done without a required permit counts as illegal construction there, which can hurt resale and get insurance claims denied. The state's small-job exemption for unlicensed work went from $500 to $1,000, but it only covers work that needs no permit, done by someone with no employees on the job.
Most floors we pour around here go into houses getting a room added, a garage converted or a worn-out slab replaced. We're based in East Los Angeles and do the same work in the cities around it, like Montebello and Downey, plus plenty of others nearby.