I do Plan Review here in NJ, solar, and everything else electrically. Sure would be nice to have an hourly rate! (LOL)
Plan review is part of the permit application & approval process, and there are no 'Plan Review Fees'. The only exception involves projects that are submitted without prior approvals (Zoning/Planing Board, etc) which are subject to a charge, based on 20% of the electrical permit fees.
Again, interesting information learned via ECN