Accord and satisfaction is a contract law concept about the purchase of the release from a debt obligation.
The release is completed by the transfer of valuable consideration that must not be the actual performance of the obligation itself.
At completion, the homeowner complained about inferior work quality and refused to make the final payment.
It must therefore have the essential terms of a contract, (parties, subject matter, time for performance, and consideration).
In this instance the non-offending party has the right to sue under either the original contract or the accord agreement.