You started a $1.2 million brownstone gut renovation in Cobble Hill last spring. Four months in, your contractor hands you a $340,000 invoice for " extra work" — added structural beams, rerouted plumbing, premium tile you never picked. You ask where the change orders are. He shrugs and says you verbally approved everything over coffee on the job site. Welcome to a change order dispute — the single most common fight in New York residential and commercial