[John Rogers]

If it were me, I would take pictures and plans and see an electrical contractor. If it costs some $$$$$ you'll be ahead when it has to be inspected. Your city may also provide that service but locations vary.

When we had solar installed we needed a new breaker panel since ours was 1960 vintage and not legal any longer. The electrical contractor knew exactly what to do and how to install the new panel so when the city inspector came around, he barely glanced at it.