the role of a contractor in construction is to ensure that the structure is built as per drawings. Specifically as per Architectual drawing because it is this drawing which best represents the final...
It depends on if the construction to be performed was by written contract or by verbal agreement.
Written contract can be disputed in a court of law(small claims most likely), provided that you have...
the role of the contractor is quite obvious because the project can not be accomplished without a contractor.it is the only contractor who can execute the operation of the project and bring it to end.