1) $0.75 to $1 per sq. ft of building footprint depending on the overall size, number of floors, construction materials;
2) estimate construction cost per sq ft (typically $100/sq ft for most commercial projects, $125/sq ft for health care, $85/sq ft for classrooms, $200/sq ft for fine arts centers); 10% to 15% of const. cost for structural; 4% to 6% of structural costs for fee; I will use a preliminary cost estimate if one is provided;
3) 1.25 multiplier for design build or project involving a construction manager;
4) fees include meetings during design effort, construction admin effort (site visits and shop drawing review);
5) I don't base fee on number of sheets, although architects known for intricate designs that require alot of detailing on my part will be charged a higher fee than normal.