Specify the size and grade of water line from street to house, size and grade of lines to fixtures, brand, make and color of toilets, etc. This reduces the need for change orders and prevents disagreements. Any subcontractor can make modifications in his bid but only at the bottom of the form. Yes, each contract requires the customer to execute a change order if he makes a change, or if the builder encounters abnormal soil conditions, rock or other unforeseen conditions. There are different contracts because sometimes the customer owns the property, other times the builder owns the property.
Some jobs are new construction, others remodeling.
Some customers want a fixed priced , others want a cost plus agreement. Most contracts print out 6 or 7 pages. They are very comprehensive and we have tried to cover everything to prevent disagreements. Make changes as you see fit. Yes, these are the latest approved FHA, VA, and FmHA forms.