What is a construction proposal? What to include in a construction proposal.Discover what a bid proposal is, the elements of a bid proposal, how to create one and a template and example that can guide you. Learn how to write a bid proposal for construction projects step-by-step. Elevate your bidding game and start winning projects more today. All proposals, plans, Project Bids (EBSX) files and addenda are also available on the Office of Contracts web site. All bids submitted must be typed or written legibly on this form and must be submitted to the.