How To Write A Rebuild Estimate Proposal . Some of the reasons you might use this form include: Estimate proposal template in pdf. 31 Construction Proposal Template & Construction Bid Forms from templatelab.com The contents of the mockup have been placed in sections. It’s a document that identifies a single price the contractor will charge after calculating the potential costs they will incur as a result of completing the customer's project. Write an introductory section, called the executive summary, to summarize your project.