How to use this result
Treat a mezzanine as a building project. Adjust each allowance only after discussing use, loads, slab, fire protection, exits and permitting.
Platform cost
Area × structure and deck allowance.
Non-structural scope
Stairs, guards, building services and professional work can be a large share of total cost.
Important: This does not design a structure or determine allowable use, foundations, stairs, egress, accessibility or fire protection.