The formulas US building departments use: valuation tables, per-$1,000 and per-square-foot rates, minimums, plan review and state surcharges.
What a remodel, an addition and a new home cost in permit fees, compared across US cities using each official fee schedule.
How building departments decide what your project is worth for permit fees: contract price, the ICC Building Valuation Data table, or a local table.
State surcharges, technology fees, impact and utility fees, re-inspections and more: what else turns up beside the building permit fee, from official schedules.
What the plan review fee pays for, how cities price it, and how much of a permit bill it is, from official fee schedules.