Have qualified architect or designer prepare the required sets of preliminary site plans. A business proposal is a document you send to potential customers to persuade them to do business with you.Vendors should submit written proposals in the manner described in the specific documents for open requests posted on this page, below. For plan submittal requirements, please refer to the Electronic Plan Submittal Guide. Alternative options for plan submissions are available. Page for all Building Section Forms. The City's current and past bids, including all bid documents, questions and answers, addenda, and final results, are available on Biddingo.