How To Write A Construction Contract Proposal . Let’s dive right into the steps for writing effective construction bids. Details in this proposal include specific materials, payment schedule and costs. 13+ Sample Contractor Proposals Sample Templates from www.sampletemplates.com Suppose you are the person responsible for the project’s financial management. There are several elements to a contract proposal, which include: For instance, a bid proposal for data entry or a google docs bid proposal template for any other bid is written in response to a bid posted by any company.