There is no dispute that a surety's obligations are limited to those it undertakes in its bond and that the bond attaches to the principal contract and must be construed in conjunction therewith ( Carrols Equities Corp. v Villnave, 57 AD2d 1044, 1045, lv denied 42 NY2d 810).
In the matter at bar, the IAS Court erred when it held that the utility work constituted "additional work" which Sette-Juliano was required to perform to satisfy its obligations under the contract. In fact, Sette-Juliano was neither required nor authorized to perform the work without first being hired to do so by the utility companies. Moreover, the utility companies had the option, at the time in question, to do the work themselves, bring in an outside contractor to do the work, or hire Sette-Juliano, which was already at the job site. The utility companies chose the latter. In addition, there is no reason to conclude, as the IAS Court did, that the bond was issued by Aetna with the intention of covering the separate contracts, especially since, under the court's determination, the bonds became insufficient, by approximately $1,000,000, to cover the cost of the construction project.