How do I confirm I am not paying twice on a Change Work Order? The original contract included refurbishment of the porch which included; Siding & architectural details Installing porch railings & columns Exterior framing of porch Painting We determine there was more damage to the porch then originally thought and my contractor provided a Change Work Order. In review it looks like he wants to charge for the same items in the original contract which he has already been paid without giving credit. Siding Installing porch railings & columns Exterior framing of porch Painting Is it proper to have a separate contractor estimate the porch rebuild?