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. What is a construction proposal?What to include in a construction proposal. Requests for interpretation of the Bidding Documents shall be made in writing not later than six (6) business days prior to the date set for receipt of bids. Use a construction proposal template to automate the creation of contracts and make sure you never put the wrong name or figure in a proposal again. Time allotted for construction is 120 days for substantial completion and 150 days for final completion. Your construction bid should be formatted formally. All bids must be signed. Unsigned bid forms or bid proposals will not be considered.