Bidding Opportunities. Records Building – 500 Elm Street, Suite 5500, Dallas, TX 75202.How do I bid on a City of Dallas contract? For information on the bidding process, please contact the City of Dallas Procurement Services at: (214) 670-3326. City of Dallas, TX , TX is looking to buy goods and services. Discover all bid opportunities, RFPs, and government contracts with City of Dallas, TX. Dallas County's Open and Closed Solicitations are posted below. Please register or login to see details of all open opportunities. Download and complete the subcontractor form to get on our bid list. Ask Us a Question. Subcontractors.