Shares strategies and insider's tips to help you build solid, fundable proposals with planning tools, worksheets, roadmaps, and fillable templates. Easily customize proposals in the format that the owner requires through the construction proposal software feature menu within HeavyBid.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. What is a construction proposal? What to include in a construction proposal. Download North Carolina Request for Proposal template, modify and send for signing using BoloForms Signature.