A request for proposal (RFP) is meant to give direction to a contractor or vendor regarding the scope of service for a project. The Public Building Commission of Chicago ("Commission" or "PBC") has enhanced education, safety, and recreation across.PROPOSAL TRANSMITTAL FORM for DESIGNBUILD PROJECTS (DBPTF). 2. DESIGN-BUILD PRICING SCHEDULE (DBPS). 3. The project is the Washington Park National Bank Building which is located at 6300 S. Cottage Grove, Chicago Illinois.