62 Pa. C.S. § 906
Before a contract for construction is effective, the head or a deputy of the purchasing agency may issue binding letters of intent to contract. A bidder or offeror receiving a letter of intent may rely on the letter to prepare to start work to the extent authorized by the letter and incur costs in preparation for performance of the contract. No work on the construction site shall be commenced and no payment shall be made to the bidder or offeror until the contract is fully executed. If the contract is not fully executed, the bidder or offeror shall be entitled to reimbursement for its actual expenses reasonably incurred pursuant to the letter prior to notification from the purchasing agency not to proceed. Reimbursement shall not include any loss of anticipated profit, loss of use of money or administrative or overhead costs.
62 Pa.C.S. § 906