Core Event: A Washington court case (referenced as McClure and Sons) established that promissory estoppel can bind subcontractors to their bids even without a formal signed contract.[1][2] In the case, an electrical subcontractor submitted a low bid to a general contractor, who relied on it to submit a winning bid to the city. When the subcontractor later attempted to withdraw its bid and refuse performance, the courts ruled the subcontractor was legally bound to honor the original price commitment, ultimately requiring it to pay over $300,000 in damages—the difference between its bid and the replacement contractor's higher cost.[1][2]

Legal Principle: The doctrine of promissory estoppel enforces promises based on fairness when three conditions are met: a clear promise (the bid itself), reasonable reliance on that promise (incorporating it into the prime bid), and detriment from reliance (the financial loss when the subcontractor walks away).[3] Under this doctrine, a subcontractor's bid is considered an irrevocable offer until the prime contract is awarded; once the general contractor wins based on that bid, acceptance creates a binding bilateral contract.[1][2]

Why It's Newsworthy: The ruling is significant because it clarifies that subcontractors cannot simply withdraw bids after general contractors have relied on them to win projects, even without signed subcontracts. This protects general contractors in volatile construction markets where material costs fluctuate rapidly.[3] The doctrine creates an asymmetry: general contractors can typically enforce subcontractor bids through promissory estoppel, but subcontractors have fewer grounds to hold general contractors to oral commitments.[3]