The National Kitchen & Bath Association (NKBA) breaks down kitchen remodeling costs like this:
Design fees: 4%
Appliances and ventilation: 14%
Cabinetry and hardware: 29%
Doors and windows: 4%
Walls and ceilings: 5%
Faucets and plumbing: 4%
ALWAYS be sure that your General Contractor is Currently Licensed and Bonded!