Below is a list of forms and information that may be required to complete a Request for Proposal Response. The complete bid or proposal must be submitted to the Department of Procurement Services before the date and time specified.Need a construction proposal template for your business? Here is a free sample construction proposal that you can use right away. The Public Building Commission of Chicago ("Commission" or "PBC") has enhanced education, safety, and recreation across. Map out a realistic timeline for the project, breaking it down into phases of work. 1. Gather all necessary information before beginning.