The Bid shall contain an acknowledgement of receipt of all Addenda (the numbers of which must be filled in the Bid Form). 10.8. Construction Bid Forms are a way to communicate interest on a construction project and provide a contractor's estimate on costs, timelines, terms and details.Form S3B-3 (Business Self-Certification). This section includes an example construction bid and contract with certifications and forms. How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document. This Invitation to Bid can be used for construction procurement. In this article, we're sharing insight into bidding on construction projects, giving you the tools you need to win construction bids and grow your business.